Northern Illinois, Illinois, United States of America: What to pack, what to wear, and when to go [2023]

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Traveling to Northern Illinois, Illinois, United States of America? If you're planning to go to Northern Illinois, this article contains some important information about when to go, what to wear, and what to pack.

Contents

When to go to Northern Illinois, Illinois, United States of America

Based on the climate and weather in Northern Illinois, Illinois, United States of America, the best time to go is August. See below for details.

What to wear/what to pack for Northern Illinois, Illinois, United States of America

Already know when you're traveling?

Here are some general tips on what to wear in Northern Illinois, as well as several items to remember to pack when traveling there.

What to wear/what to pack for Northern Illinois, Illinois, United States of America by month

January

January in Northern Illinois is freezing and snowy. The average overnight temperatures in the area are in the 10s F (10+ below zero C), with a few days below 0 F (10+ below zero C). It tends to rain 5-10 days this month. It also snows regularly. But the colder weather doesn't bring low humidity, which is in the 60% to 70% range on average.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your things.

Comfort + Essentials

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck support pillow

    What we like is this one

  • Voltage step down adapter

    A plug adapter that supports outlet types A and B. Be sure to find the right kind. The majority of adapters available are simply plugs and require your electronics to adjust the voltage themselves. If yours can't do that they could get fried. This one works in most areas.

  • Easy folding travel stroller

    This stroller is only 10 lbs and folds to the size of a big book.

February

February in Northern Illinois is very cold and snowy. The average overnight temperatures in the area are in the high 10s F (single digits below 0 C), with a few days below 0 F (10+ below zero C). It tends to rain about a third of the time. It also snows sometimes. But the colder weather doesn't bring low humidity, which is in the 60% to 70% range on average.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your stuff.

Comfort + Essentials

  • Power bank for devices

    A portable power bank, like this one

  • Plug adapter

    A plug adapter that supports outlet types A and B. Be sure to find the necessary kind. The majority of adapters available online are simply plugs and require your devices to convert the voltage themselves. If yours can't do that they could get fried. This one should be sufficient for most countries.

  • Ultraportable travel stroller

    This stroller weighs almost 10 pounds and folds to the size of a big book.

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Travel pillow

    Our fave is this one

March

If you are traveling to Northern Illinois in March, you will notice that it is pretty cool, snowy and somewhat rainy. Expect it to rain about a third of the time and snow once in a while. Daytime temperatures are in the 40s F (single digits C).

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your belongings.

Comfort + Essentials

  • Ultraportable travel stroller

    This stroller is only 10 pounds and folds to the size of a big book.

  • Travel voltage adapter

    A plug adapter that supports outlet types A and B. Take care to find the necessary kind. The vast majority of adapters that you can buy are just plugs and expect your devices to change the voltage themselves. If your electronics can't do that they could get destroyed. This one should be sufficient for most areas.

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck support pillow

    A versatile choice is this one

April

If you go to Northern Illinois in April, you will notice that it is relatively cool and somewhat rainy. Expect it to rain regularly. Daytime temperatures are in the low 50s F (mid 10s C).

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Anti-theft backpack

    For a bit of peace of mind, an anti-theft backpack protects your belongings.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

Comfort + Essentials

  • Power bank for devices

    A portable power bank, like this one

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Ultraportable travel stroller

    This stroller weighs just 10 lbs and folds to the size of a big book.

  • Plug adapter

    A plug adapter that supports outlet types A and B. Be sure to get the right type. The vast majority of adapters on sale are just plug changers and require your electronics to change the voltage themselves. If your devices can't do that they could get fried. This one should be appropriate for most places.

  • Travel neck support pillow

    A great choice is this one

May

If you vacation in Northern Illinois during May, you might see that it is mild and somewhat rainy. Temperatures tend to hover around the low 70s F (low 20s C) during the day, while at night they can dip into the high 40s F (single digits C). Humidity is generally around 50 during the day. In terms of precipitation, you can expect it to rain a bit less than half of the time.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Anti-theft backpack

    For a little peace of mind, an anti-theft backpack protects your stuff.

Comfort + Essentials

  • Ultralightweight travel stroller

    This stroller weighs almost 10 pounds and folds to the size of a big book.

  • Power bank for devices

    A portable power bank, like this one

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Travel neck support pillow

    An excellent option is this one

  • Plug adapter

    A plug adapter that supports outlet types A and B. Make sure to get the right kind. Most adapters available online are simply plug changers and expect your electronics to adjust the voltage themselves. If your electronics can't do that they could burn up. This one should be appropriate for most areas.

June

If you visit Northern Illinois during June, you may see that it is hot and somewhat rainy. Temperatures tend to hover around the low 80s F (high 20s C) during the day, while at night they can dip into the high 50s F (mid 10s C). Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain regularly.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your things.

Comfort + Essentials

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Power bank for devices

    A portable power bank, like this one

  • Super portable foldable travel stroller

    This stroller weighs only 10 lbs and folds to the size of a big book.

  • Travel pillow

    A great choice is this one

  • Travel voltage adapter

    A plug adapter that supports outlet types A and B. Ensure that you choose the correct type. The majority of adapters for sale now are just plugs and require your devices to convert the voltage themselves. If yours can't do that they could burn up. This one should be appropriate for most areas.

July

In July, Northern Illinois can be very hot and somewhat rainy. Temperatures routinely are in the high 80s F (low 30s C) and 5-10 days this month jump into the low 90s F (low 30s C) range. At night, lows are in the low 60s F (high 10s C). This is also a rainy time for Northern Illinois, with several of the days of the month having rain. In July, humidity reaches as high as 60%.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your stuff.

Comfort + Essentials

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Travel voltage adapter

    A plug adapter that supports outlet types A and B. Take care to find the correct type. Many adapters currently available are simply plug changers and require your devices to change the voltage themselves. If yours can't do that they could burn up. This one should be appropriate for most locations.

  • Folding travel stroller

    This stroller weighs almost 10 lbs and folds to the size of a big book.

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck support pillow

    A top rated pillow is this one

August

August in Northern Illinois is hot. The rain can amount to several inches/centimeters. During this time, temperatures average in the low 70s F (low 20s C) to 80s F (high 20s C), although night temperatures can dip into the low 60s F (mid 10s C).

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Anti-theft backpack

    For a little protection, an anti-theft backpack protects your things.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

Comfort + Essentials

  • Easy folding travel stroller

    This stroller weighs only 10 pounds and folds to the size of a big book.

  • Voltage adapter

    A plug adapter that supports outlet types A and B. It's important that you get the correct kind. A lot of adapters available are just plugs and expect your devices to convert the voltage themselves. If your electronics can't do that they could burn up. This one is sufficent for most areas.

  • Power bank for devices

    A portable power bank, like this one

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Travel pillow

    An excellent option is this one

September

If you go to Northern Illinois in September, you will notice that it is a perfect temperature. Expect it to rain 5-10 days this month. Daytime temperatures are in the high 70s F (mid 20s C).

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Anti-theft backpack

    For a bit of protection, an anti-theft backpack protects your things.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

Comfort + Essentials

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Super portable foldable travel stroller

    This stroller weighs almost 10 pounds and folds to the size of a big book.

  • Travel voltage adapter

    A plug adapter that supports outlet types A and B. Ensure that you choose the right kind. Many adapters available are just plugs and expect your electronics to adjust the voltage themselves. If yours can't do that they could burn up. This one should be appropriate for most countries.

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck pillow

    A top rated pillow is this one

October

October in Northern Illinois can be chilly. Temperatures average in the 60s F (high 10s C) during the day. It rains 5-10 days this month.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Anti-theft backpack

    For a little protection, an anti-theft backpack protects your things.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

Comfort + Essentials

  • Voltage step down adapter

    A plug adapter that supports outlet types A and B. It's important that you choose the right kind. The majority of adapters available online are simply plugs and require your devices to adjust the voltage themselves. If yours can't do that they could get fried. This one is sufficent for most places.

  • Easy folding travel stroller

    This stroller weighs only 10 lbs and folds to the size of a big book.

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck pillow

    Our favorite is this one

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

November

November in Northern Illinois is pretty cool. The rain/snow can amount to several inches/centimeters. During this time, temperatures average in the high 40s F (single digits C), although night temperatures can dip into the low 20s F (single digits below 0 C).

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Anti-theft backpack

    For a little protection, an anti-theft backpack protects your belongings.

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

Comfort + Essentials

  • Travel neck pillow

    A good option is this one

  • Power bank for devices

    A portable power bank, like this one

  • Travel adapter

    A plug adapter that supports outlet types A and B. Be careful to find the right kind. A lot of adapters currently being sold are simply plug changers and require your devices to convert the voltage themselves. If yours can't do that they could get destroyed. This one should work in most areas.

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Easy folding travel stroller

    This stroller weighs just 10 lbs and folds to the size of a big book.

December

December in Northern Illinois is frosty, snowy and somewhat rainy. The average overnight temperatures in the area are in the high 10s F (single digits below 0 C), with a few days below 0 F (10+ below zero C). It tends to rain a bit less than half of the time. It also snows a bit less than half of the time. But the colder weather doesn't bring low humidity, which is in the 70% to 70% range on average.

What to wear/what to pack:

Clothes + Footwear
Health
Safety + Security

  • Money/passport pouch

    A money pouch is vital for protecting your passport and credit cards.

  • Voice and data SIM card

    A SIM card that works in Northern Illinois. A good global SIM card works in most countries, but check the country list before buying.

  • Anti-theft backpack

    For a little protection, an anti-theft backpack protects your stuff.

Comfort + Essentials

  • Ultralightweight travel stroller

    This stroller is only 10 pounds and folds to the size of a big book.

  • Airplane phone mount

    Make your flight more comfortable with an airplane phone mount

  • Travel voltage adapter

    A plug adapter that supports outlet types A and B. Make sure to get the correct type. Many adapters currently sold are just plugs and expect your devices to convert the voltage themselves. If yours can't do that they could burn up. This one is sufficent for most places.

  • Power bank for devices

    A portable power bank, like this one

  • Travel neck pillow

    A top rated pillow is this one

About your travel guide

Hi! I'm Dev. I've traveled all over the world and in my travels, I have made many packing lists. In this series, my team and I have compiled the most useful information, as well as things we couldn't live without, to help you plan your trip.

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