Grayslake, Illinois, United States of America: What to pack, what to wear, and when to go [2018]

Traveling to Grayslake, Illinois, United States of America? If you're planning to go to Grayslake, here is some important information about when to go, what to wear, and what to pack:

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

Based on the climate and weather in Grayslake, the best time to go is August. See below for details.

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

January

January in Grayslake 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 5-10 days this month.

It also snows about a third of the time. 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:

  • Very heavy socks
  • Waterproof coat
  • Waterproof boots
  • Multiple layer jacket shell
  • Thermal undergarments
  • Pajamas, such as sweats
  • Insulated boots
  • Gloves
  • Scarf
  • Fleeces
  • Sweaters
  • Umbrella

February

February in Grayslake is very cold and snowy. The snow can amount to several inches/centimeters.

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

What to wear/what to pack:

  • Waterproof boots
  • Waterproof coat
  • Heavy jacket
  • Cold weather footwear
  • Gloves or mittens
  • Warm pants or jeans
  • Sweaters
  • Heavy socks
  • Umbrella

March

March in Grayslake can be brisk, snowy and somewhat rainy. The average overnight temperatures in the area are in the high 20s F (single digits below 0 C). It tends to rain about half of the time.

It also snows sometimes. But the colder weather doesn't bring low humidity, which is in the 50% to 60% range on average.

What to wear/what to pack:

  • Sweaters
  • Cold weather footwear
  • Waterproof boots
  • Umbrella
  • Heavy jacket
  • Waterproof coat
  • Heavy socks
  • Warm pants or jeans
  • Gloves or mittens

April

If you visit Grayslake during April, you are likely to find that it is chilly and somewhat rainy. Temperatures tend to hover around the high 50s F (mid 10s C) during the day, while at night they can dip into the high 30s F (single digits C).

Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain about half of the time.

What to wear/what to pack:

  • Fleeces
  • Standard footwear
  • Warm pants or jeans
  • Light gloves or mittens
  • Umbrella
  • Jacket or coat
  • Waterproof footwear
  • Socks
  • Waterproof luggage
  • Rain coat

May

In May, Grayslake is mild and somewhat rainy. Temperatures routinely are in the low 70s F (low 20s C) and regularly jump into the low 80s F (high 20s C) range. At night, lows are in the high 40s F (single digits C).

This is also a rainy time for Grayslake, with several of the days of the month having rain. In May, humidity reaches as high as 60%.

What to wear/what to pack:

  • Pants or jeans
  • Umbrella
  • Dresses
  • Standard footwear
  • Waterproof luggage
  • Waterproof footwear
  • Long skirts
  • Long sleeve shirts or blouses
  • Rain coat
  • Light jacket or fleece
  • Socks

June

If you vacation in Grayslake during June, you are likely to find that it is a perfect temperature and somewhat rainy. Temperatures tend to hover around the low 70s 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 a bit less than half of the time.

What to wear/what to pack:

  • Dresses
  • Waterproof footwear
  • Sunscreen lotion
  • Sandals
  • Umbrella
  • Skirts
  • Rain coat
  • Shorts or short pants
  • Waterproof luggage
  • Long and short sleeve shirts
  • Light footwear

July

July for Grayslake is pretty consistently hot and somewhat rainy. Temperatures average in the 80s F (high 20s C) during the day. It rains a bit less than half of the time.

What to wear/what to pack:

  • Short sleeve shirts
  • Sandals
  • Skirts
  • Dresses
  • Rain coat
  • Sunglasses
  • Waterproof footwear
  • Umbrella
  • Waterproof luggage
  • Sunscreen lotion
  • Shorts

August

August in this region is extremely warm. Temperatures average in the low 80s F (high 20s C) during the day. It rains 5-10 days this month.

What to wear/what to pack:

  • Umbrella
  • Dresses
  • Waterproof footwear
  • Sandals
  • Skirts
  • Waterproof luggage
  • Long and short sleeve shirts
  • Light footwear
  • Rain coat
  • Sunscreen lotion
  • Shorts or short pants

September

In September, Grayslake is a perfect temperature and somewhat rainy. Temperatures routinely are in the 70s F (mid 20s C) and 5-10 days this month jump into the low 80s F (high 20s C) range. At night, lows are in the 50s F (low 10s C).

This is also a rainy time for Grayslake, with several of the days of the month having rain. In September, humidity reaches as high as 60%.

What to wear/what to pack:

  • Umbrella
  • Sunscreen lotion
  • Light footwear
  • Rain coat
  • Skirts
  • Waterproof luggage
  • Shorts or short pants
  • Long and short sleeve shirts
  • Dresses
  • Waterproof footwear
  • Sandals

October

October in Grayslake is chilly. The average overnight temperatures in the area are in the low 40s F (single digits C).

It tends to rain a bit less than half of the time. With the colder weather comes lower humidity, which is in the 50% to 60% range on average.

What to wear/what to pack:

  • Dresses
  • Waterproof footwear
  • Umbrella
  • Light jacket or fleece
  • Waterproof luggage
  • Pants or jeans
  • Long sleeve shirts or blouses
  • Long skirts
  • Socks
  • Standard footwear
  • Rain coat

November

November in Grayslake can be brisk and somewhat rainy. The average overnight temperatures in the area are in the low 30s F (single digits C).

It tends to rain 5-10 days this month. 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:

  • Light gloves or mittens
  • Fleeces
  • Umbrella
  • Standard footwear
  • Warm pants or jeans
  • Waterproof coat
  • Socks
  • Waterproof boots
  • Jacket or coat

December

In December, Grayslake is very cold, snowy and somewhat rainy. Temperatures routinely are in the 30s F (single digits C) and regularly jump into the low 40s F (single digits C) range. At night, lows are in the low 20s F (single digits below 0 C).

During your visit, you can expect extremely heavy snowfall. This is also a rainy time for Grayslake, with several of the days of the month having rain. In December, humidity reaches as high as 70%.

What to wear/what to pack:

  • Cold weather footwear
  • Sweaters
  • Waterproof boots
  • Gloves or mittens
  • Warm pants or jeans
  • Umbrella
  • Heavy socks
  • Waterproof coat
  • Heavy jacket

Year-round what to wear/what to pack for Grayslake, Illinois, United States of America

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

  • A plug adadpter that supports outlet types A and B
  • A SIM card that works in Grayslake

Check out our guides for these other locations: Burgas, Bulgaria, Słubice, Poland, Yoder, Kansas, United States of America, Union County, New Jersey, United States of America, Härjedalen, Sweden, Great Basin National Park, Nevada, United States of America, Kiunga, Papua New Guinea, Banteay Chhmar, Cambodia, Mount Gretna, Pennsylvania, United States of America, Saharanpur, India, and Csongrád County, Hungary.