Average annual temperature is 16.5 °C
Absolute maximum temperature: 40.9 °C
Absolute minimum temperature: -11.7 °C
Number of sunny days: 238 days
Number of rainy days: 126 days
Number of snow days: 1 day
Look at detailed online map of Jefferson
* Weather data for Jefferson 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) | 17.3 | 22.6 | 28.5 | 33.8 | 33.8 | 38.8 | 38.5 | 40.9 | 39.0 | 32.7 | 24.7 | 19.3 |
| Average daytime temperature (°C) | 10.5 | 12.7 | 17.0 | 24.3 | 26.7 | 31.0 | 33.9 | 35.1 | 31.6 | 23.4 | 15.7 | 12.1 |
| Average temperature (°C) | 4.2 | 5.1 | 9.9 | 16.1 | 20.6 | 25.0 | 28.0 | 28.9 | 25.3 | 17.4 | 9.6 | 6.6 |
| Average night temperature (°C) | -0.3 | -0.2 | 4.2 | 9.6 | 15.3 | 19.7 | 22.7 | 23.3 | 19.9 | 12.3 | 4.6 | 2.5 |
| Absolute minimum temperature (°C) | -11.7 | -8.8 | -7.0 | 1.7 | 5.0 | 15.9 | 17.6 | 16.3 | 14.9 | -1.8 | -7.9 | -4.0 |
| 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 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 7.0 | 7.9 | 9.1 | 9.8 | 10.1 | 11.3 | 12.0 | 12.1 | 10.2 | 8.5 | 7.4 | 6.7 |
| Precipitation (mm) | 57 | 28 | 14 | 61 | 73 | 96 | 102 | 42 | 57 | 53 | 54 | 56 |
| Sunny days | 23 | 20 | 20 | 19 | 14 | 14 | 18 | 22 | 20 | 22 | 24 | 22 |
| Rainy days | 8 | 8 | 11 | 11 | 17 | 16 | 13 | 9 | 10 | 9 | 6 | 8 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Jefferson during the most sunny months:
The largest precipitation sum in Jefferson is at