Average temperature in Jacksonville (IL)
The mean minimum and maximum temperatures over the year in Jacksonville (Illinois), the United States of America.
- The months of May, June, August and September have nice average temperatures.
- On average, the warmest month(s) are June, July and August.
- On average, the warmest month is July with 30°C.
- On average, the coolest month is January with 2°C.
- The average annual maximum temperature is 18°C.
- The average annual minimum temperature is 6°C.
Forecast for Jacksonville (IL)
almost clear and small chance of rain
almost clear and no rain
partly cloudy and small chance of slight rain