Best year time to visit Grayslake

General weather information about Grayslake

Average annual temperature is 10.7 °C

Absolute maximum temperature: 37.0 °C

Absolute minimum temperature: -23.7 °C

Number of sunny days: 170 days

Number of rainy days: 176 days

Number of snow days: 19 days

Look at detailed online map of Grayslake

* Weather data for Grayslake United States is based on climate observations for 2026 year

Grayslake air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)9.615.820.326.731.433.033.937.034.128.219.213.0
Average daytime temperature (°C)2.54.66.815.521.426.928.026.923.616.59.15.8
Average temperature (°C)-1.3-0.71.99.114.820.322.622.019.112.44.62.6
Average night temperature (°C)-4.0-4.9-1.73.89.314.618.417.915.69.11.10.4
Absolute minimum temperature (°C)-23.7-22.5-11.7-2.51.27.514.212.79.6-2.2-10.6-7.6

Grayslake monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.510.611.913.414.615.214.913.912.511.19.89.1
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)3.47.66.58.610.711.811.610.58.16.56.93.6
Precipitation (mm)58998684414112310383983967
Sunny days11168122019101512112115
Rainy days12101917111121161819715
Snow days824100000121

Grayslake - weather forecast by months

Grayslake weather in januaryGrayslake weather in februaryGrayslake weather in marchGrayslake weather in aprilGrayslake weather in mayGrayslake weather in juneGrayslake weather in julyGrayslake weather in augustGrayslake weather in septemberGrayslake weather in octoberGrayslake weather in novemberGrayslake weather in december

Best time to visit Grayslake:

The best time to visit Grayslake during the most sunny months:

  • May — 10.7(h)
  • June — 11.8(h)
  • July — 11.6(h)
  • August — 10.5(h)

The largest precipitation sum in Grayslake is at

  • February — 99(mm)
  • July — 123(mm)
  • August — 103(mm)
  • October — 98(mm)

    • Weather forecast in the closest to Grayslake admin centers

    Weather forecast in the closest towns to Grayslake

    Explore Grayslake

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

    When is the best time to visit Grayslake?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Grayslake.
    What is the weather like in Grayslake?
    See average temperature, rainfall and daylight hours for Grayslake by month in the table above.
    How many sunny days does Grayslake have?
    The monthly weather statistics above show sunshine and rainfall patterns for Grayslake throughout the year.