Average annual temperature is 9.5 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: -14.0 °C
Number of sunny days: 222 days
Number of rainy days: 118 days
Number of snow days: 25 days
Look at detailed online map of City of Rock Island
* Weather data for City of Rock Island United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 7.1 | 9.2 | 11.7 | 24.9 | 31.4 | 31.7 | 34.5 | 37.9 | 29.6 | 22.8 | 10.6 | 6.5 |
| Average daytime temperature (°C) | 0.9 | 2.5 | 6.6 | 11.8 | 23.5 | 25.3 | 30.5 | 30.1 | 22.9 | 14.9 | 5.1 | 2.0 |
| Average temperature (°C) | -1.4 | -1.2 | 1.6 | 6.2 | 16.3 | 18.3 | 22.9 | 22.8 | 16.3 | 9.8 | 2.0 | -0.2 |
| Average night temperature (°C) | -3.6 | -4.0 | -2.1 | 1.3 | 10.7 | 12.6 | 16.1 | 17.0 | 11.4 | 6.0 | -0.6 | -2.3 |
| Absolute minimum temperature (°C) | -14.0 | -12.9 | -7.1 | -4.1 | 4.9 | 6.3 | 12.0 | 11.9 | 4.7 | -4.3 | -5.3 | -5.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.1 | 15.9 | 15.5 | 14.2 | 12.6 | 10.9 | 9.4 | 8.5 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 4.5 | 5.9 | 7.4 | 9.2 | 13.0 | 13.4 | 13.7 | 11.8 | 9.8 | 7.9 | 4.7 | 2.6 |
| Precipitation (mm) | 67 | 31 | 49 | 56 | 3 | 11 | 6 | 4 | 25 | 34 | 66 | 97 |
| Sunny days | 12 | 18 | 12 | 12 | 24 | 26 | 29 | 23 | 21 | 19 | 16 | 10 |
| Rainy days | 11 | 6 | 13 | 17 | 7 | 4 | 2 | 8 | 9 | 12 | 13 | 16 |
| Snow days | 8 | 4 | 6 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 5 |
The best time to visit City of Rock Island during the most sunny months:
Months with the longest average daylight duration in City of Rock Island:
The largest precipitation sum in City of Rock Island is at