Average temperature in Crystal Lake (IL)
The mean minimum and maximum temperatures over the year in Crystal Lake (Illinois), the United States of America.
- The months of May, June, July, August and September have nice average temperatures.
- Cold season / winter is in the months January and February.
- On average, the warmest month is July with 28°C.
- On average, the coolest month is January with -1°C.
- The average annual maximum temperature is 14°C.
- The average annual minimum temperature is 3°C.
Forecast for Crystal Lake (IL)
broken clouds and thunder
partly cloudy and no rain
overcast and rain