Grayslake is a city of approximately 20,900 people in Illinois, United States. Located in the Central Time Zone at 42.3°N latitude.
Expect a humid continental climate in Grayslake: average highs of 81°F in midsummer, lows near 16°F in midwinter, and an annual mean of 48°F. Precipitation totals roughly 35 inches per year, concentrated around June, with January typically the driest month.
View historical weather for Grayslake · More cities in Illinois