Northern Illinois, Illinois, United States of America: What to pack, what to wear, and when to go [2021]

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Traveling to Northern Illinois, Illinois, United States of America? If you're planning to go to Northern Illinois, this is 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, the best time to go is August. See below for details.

Important esssentials for Northern Illinois, Illinois, United States of America

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 very cold and snowy. The snow can amount to several inches/centimeters.

During this time, temperatures average in the low 20s F (single digits below 0 C) to low 30s F (single digits below 0 C), although night temperatures can dip into the single digits F (10+ below zero C).

What to wear/what to pack:

February

February in Northern Illinois is freezing 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 once in a while. 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:

March

March for Northern Illinois is pretty cool, snowy and somewhat rainy. Temperatures average in the 40s F (single digits C) during the day. It rains about a third of the time and snows occasionally.

What to wear/what to pack:

April

April in Northern Illinois is cool and somewhat rainy. Temperatures average in the low 50s F (mid 10s C) during the day. It rains 5-10 days this month.

What to wear/what to pack:

May

May is mild and somewhat rainy. Temperatures average in the low 70s F (low 20s C) during the day. It rains a bit less than half of the time.

What to wear/what to pack:

June

If you vacation in Northern Illinois during June, you might find that it is pretty consistently 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 about a third of the time.

What to wear/what to pack:

July

July in Northern Illinois is consistently hot and somewhat rainy. The rain can amount to several inches/centimeters.

During this time, temperatures average in the high 80s F (low 30s C), although night temperatures can dip into the low 60s F (mid 10s C).

What to wear/what to pack:

August

Traveling to Northern Illinois in August, you will notice that it is hot. Expect it to rain regularly. Daytime temperatures are in the 80s F (high 20s C).

What to wear/what to pack:

September

September for Northern Illinois is a perfect temperature. Temperatures average in the high 70s F (mid 20s C) during the day. It rains 5-10 days this month.

What to wear/what to pack:

October

October in Northern Illinois is relatively cool. 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:

November

November in Northern Illinois can be very chilly. The rain/snow can amount to several inches/centimeters.

During this time, temperatures average in the high 30s F (single digits C) to 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:

December

December here is very cold, snowy and somewhat rainy. Temperatures average in the 30s F (single digits C) during the day. It rains regularly and snows 5-10 days this month.

What to wear/what to pack:

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