Rockford
The tables below display average monthly climate and weather indicators in Rockford Illinois.
Temperature by: Fahrenheit / Centigrade
| Rockford Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature | -7.7 | -5.1 | 1.7 | 8.7 | 15.1 | 20.4 | 22.9 | 21.6 | 17.3 | 10.8 | 3.3 | -4.4 | 8.7 |
| Avg. Max Temperature | -3.0 | -0.2 | 6.6 | 14.7 | 21.6 | 26.8 | 28.8 | 27.4 | 23.4 | 16.8 | 7.9 | -0.1 | 14.2 |
| Avg. Min Temperature | -12.3 | -9.9 | -3.3 | 2.7 | 8.6 | 14.1 | 16.9 | 15.7 | 11.1 | 4.8 | -1.4 | -8.8 | 3.2 |
| Days with Max Temp of 32 C or Higher | 0.0 | 0.0 | 0.0 | < 0.5 | 1.0 | 3.0 | 6.0 | 3.0 | 1.0 | < 0.5 | 0.0 | 0.0 | 14.0 |
| Days with Min Temp Below Freezing | 29.0 | 26.0 | 23.0 | 9.0 | 1.0 | 0.0 | 0.0 | 0.0 | 1.0 | 7.0 | 20.0 | 28.0 | 144 |
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| Rockford Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days | 1451 | 1179 | 930 | 519 | 239 | 24.0 | 5.0 | 15.0 | 99.0 | 427 | 810 | 1271 | 6969 |
| Cooling Degree Days | 0.0 | 0.0 | 0.0 | 0.0 | 56.0 | 138 | 259 | 198 | 42.0 | 9.0 | 0.0 | 0.0 | 702 |
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| Rockford Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) | 1.3 | 1.1 | 2.5 | 3.7 | 3.7 | 4.5 | 4.1 | 4.2 | 3.8 | 2.9 | 2.6 | 2.1 | 36.3 |
| Days with Precipitation 0.01 inch or More | 9.0 | 8.0 | 11.0 | 12.0 | 12.0 | 10.0 | 10.0 | 9.0 | 9.0 | 9.0 | 9.0 | 10.0 | 118 |
| Monthly Snowfall (inches) | 9.0 | 7.0 | 6.3 | 1.3 | 0.0 | < 0.05 | < 0.05 | < 0.05 | 0.0 | 0.1 | 2.7 | 9.1 | 35.5 |
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| Other Rockford Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed | 10.5 | 10.6 | 11.6 | 11.8 | 10.4 | 9.3 | 8.1 | 7.7 | 8.4 | 9.5 | 10.6 | 10.4 | 9.9 |
| Clear Days | 7.0 | 7.0 | 6.0 | 6.0 | 8.0 | 7.0 | 9.0 | 9.0 | 10.0 | 10.0 | 6.0 | 7.0 | 93.0 |
| Partly Cloudy Days | 7.0 | 6.0 | 8.0 | 8.0 | 9.0 | 11.0 | 12.0 | 11.0 | 9.0 | 7.0 | 6.0 | 6.0 | 98.0 |
| Cloudy Days | 17.0 | 15.0 | 17.0 | 16.0 | 14.0 | 12.0 | 10.0 | 11.0 | 12.0 | 13.0 | 18.0 | 19.0 | 174 |
| Percent of Possible Sunshine | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Avg. Relative Humidity | 57.5 | 76.5 | 74.0 | 71.5 | 68.5 | 68.0 | 71.5 | 75.0 | 75.5 | 73.0 | 71.5 | 75.5 | 78.5 |
Weather information for other cities in Illinois