Average annual temperature is 6.8 °C
Absolute maximum temperature: 35.7 °C
Absolute minimum temperature: -31.3 °C
Number of sunny days: 217 days
Number of rainy days: 103 days
Number of snow days: 45 days
Look at detailed online map of Mercer County
* Weather data for Mercer County 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) | 3.1 | 5.6 | 2.4 | 14.3 | 29.4 | 32.1 | 34.6 | 35.7 | 33.8 | 29.1 | 13.2 | 12.2 |
| Average daytime temperature (°C) | -4.2 | -2.1 | -4.5 | 7.2 | 22.7 | 27.0 | 28.1 | 28.1 | 23.9 | 12.4 | 5.7 | 3.4 |
| Average temperature (°C) | -8.4 | -7.4 | -9.0 | 1.8 | 15.9 | 21.3 | 21.3 | 21.7 | 17.6 | 7.1 | 0.6 | -1.4 |
| Average night temperature (°C) | -11.6 | -11.9 | -12.7 | -2.6 | 9.3 | 15.5 | 15.4 | 16.2 | 12.3 | 3.1 | -3.2 | -4.8 |
| Absolute minimum temperature (°C) | -27.3 | -31.3 | -21.7 | -17.0 | -2.1 | 9.8 | 9.0 | 11.3 | 7.5 | -15.3 | -13.1 | -10.9 |
| 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 | 8.6 |
| 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) | 3.9 | 7.1 | 7.6 | 9.4 | 11.5 | 12.8 | 13.3 | 10.7 | 10.1 | 7.1 | 6.8 | 5.7 |
| Precipitation (mm) | 9 | 14 | 34 | 19 | 60 | 64 | 28 | 47 | 68 | 49 | 2 | 18 |
| Sunny days | 23 | 18 | 15 | 18 | 17 | 9 | 20 | 20 | 18 | 14 | 24 | 21 |
| Rainy days | 2 | 3 | 2 | 6 | 14 | 21 | 11 | 11 | 12 | 14 | 4 | 3 |
| Snow days | 6 | 7 | 14 | 6 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 7 |
The best time to visit Mercer County during the most sunny months:
Months with the longest average daylight duration in Mercer County:
The largest precipitation sum in Mercer County is at