Grayslake, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Grayslake now
Loading the National Weather Service forecast…
Grayslake weather by the hour
Grayslake weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Grayslake.
This week in Grayslake
Sunrise, sunset and moon in Grayslake
What is the weather usually like in Grayslake?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 82°F average high
- Januarycoldest month · 13°F average low
- 38.4 inprecipitation per year · 977 mm
- 43.1 insnowfall per year · 109 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Grayslake: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MUNDELEIN 4 WSW, IL US (USC00115961), adjusted for the elevation of Grayslake.
Grayslake weather month by month
Sunrise and sunset in Grayslake through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:16 AM | 4:46 PM | 9 h 29 min |
| February | 6:46 AM | 5:25 PM | 10 h 39 min |
| March | 7:02 AM | 6:59 PM | 11 h 57 min |
| April | 6:09 AM | 7:35 PM | 13 h 25 min |
| May | 5:28 AM | 8:08 PM | 14 h 39 min |
| June | 5:13 AM | 8:32 PM | 15 h 19 min |
| July | 5:27 AM | 8:28 PM | 15 h 1 min |
| August | 5:58 AM | 7:54 PM | 13 h 56 min |
| September | 6:31 AM | 7:03 PM | 12 h 32 min |
| October | 7:03 AM | 6:11 PM | 11 h 7 min |
| November | 6:41 AM | 4:31 PM | 9 h 50 min |
| December | 7:12 AM | 4:22 PM | 9 h 9 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Grayslake?
Grayslake has a hot-summer humid continental climate. The warmest month is July, with an average high of 82°F (28°C), and the coldest is January, with average lows of 13°F (-10°C).
It gets about 38.4 inches (977 mm) of precipitation a year. The wettest month is May and the driest is January. Snow is common: about 43 inches fall in an average year.
The best time to visit Grayslake is June to September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Grayslake
Weather in towns near Grayslake
Questions about the weather in Grayslake
What is the hottest month in Grayslake?
July, with an average high of 82°F (28°C).
What is the coldest month in Grayslake?
January, with an average low of 13°F (-10°C).
How much does it rain in Grayslake?
About 38.4 inches (977 mm) a year; the wettest month is May.
Does it snow in Grayslake?
Yes, about 43 inches of snow fall in an average year.
When is the best time to visit Grayslake?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Grayslake have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Grayslake in November?
Highs average 47°F and lows 30°F, with about 2.5 inches of precipitation.
What time is sunrise in Grayslake?
Around 6:41 AM in mid-November, and sunset around 4:31 PM. Today’s exact times are shown above.
Where does this Grayslake weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Grayslake.
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