Average annual temperature is 12.2 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: -17.8 °C
Number of sunny days: 205 days
Number of rainy days: 148 days
Number of snow days: 12 days
Look at detailed online map of Galesburg
* Weather data for Galesburg 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) | 16.1 | 13.2 | 21.0 | 26.1 | 32.8 | 34.4 | 34.9 | 35.6 | 31.8 | 30.0 | 20.9 | 15.1 |
| Average daytime temperature (°C) | 3.7 | 6.6 | 9.1 | 17.8 | 25.6 | 30.0 | 29.0 | 27.8 | 25.5 | 17.9 | 10.7 | 7.3 |
| Average temperature (°C) | -0.7 | 1.0 | 3.6 | 10.8 | 19.1 | 23.6 | 23.6 | 22.9 | 20.0 | 13.3 | 5.6 | 3.4 |
| Average night temperature (°C) | -3.6 | -3.3 | -0.4 | 5.2 | 12.8 | 17.4 | 18.8 | 18.6 | 15.7 | 9.5 | 1.5 | 0.8 |
| Absolute minimum temperature (°C) | -17.8 | -17.2 | -12.0 | -1.5 | 3.4 | 9.3 | 14.2 | 11.4 | 10.8 | -2.7 | -11.1 | -7.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.0 | 7.4 | 7.0 | 9.6 | 11.5 | 12.4 | 12.4 | 10.9 | 9.7 | 7.6 | 7.6 | 4.1 |
| Precipitation (mm) | 54 | 80 | 83 | 60 | 31 | 25 | 87 | 114 | 62 | 134 | 21 | 69 |
| Sunny days | 12 | 18 | 16 | 17 | 22 | 20 | 14 | 15 | 18 | 16 | 22 | 15 |
| Rainy days | 12 | 8 | 15 | 12 | 9 | 10 | 17 | 16 | 12 | 15 | 7 | 15 |
| Snow days | 7 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
The best time to visit Galesburg during the most sunny months:
The largest precipitation sum in Galesburg is at