Average annual temperature is 8.0 °C
Absolute maximum temperature: 33.0 °C
Absolute minimum temperature: -32.0 °C
Number of sunny days: 99 days
Number of rainy days: 223 days
Number of snow days: 43 days
Look at detailed online map of Herkimer County
* Weather data for Herkimer 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) | 7.7 | 13.4 | 10.1 | 26.2 | 30.0 | 33.0 | 29.2 | 24.7 | 29.1 | 27.1 | 14.0 | 8.6 |
| Average daytime temperature (°C) | 1.3 | 1.9 | 3.0 | 14.2 | 18.7 | 21.8 | 24.8 | 21.8 | 20.7 | 14.9 | 5.0 | 3.7 |
| Average temperature (°C) | -1.9 | -3.9 | -1.4 | 7.7 | 12.0 | 16.8 | 20.2 | 17.4 | 15.9 | 10.6 | 0.9 | 0.6 |
| Average night temperature (°C) | -5.1 | -8.8 | -5.5 | 2.7 | 6.1 | 12.6 | 16.2 | 14.0 | 12.2 | 7.2 | -2.3 | -1.9 |
| Absolute minimum temperature (°C) | -12.6 | -32.0 | -11.9 | -8.7 | -1.1 | 6.5 | 11.8 | 8.7 | 7.0 | -1.5 | -9.4 | -11.7 |
| 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 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.9 | 5.5 | 5.7 | 8.0 | 11.5 | 10.2 | 11.1 | 9.4 | 8.9 | 6.1 | 5.1 | 2.6 |
| Precipitation (mm) | 128 | 91 | 133 | 151 | 65 | 156 | 171 | 165 | 50 | 95 | 94 | 155 |
| Sunny days | 5 | 7 | 6 | 10 | 17 | 6 | 3 | 5 | 17 | 7 | 7 | 9 |
| Rainy days | 17 | 11 | 14 | 19 | 14 | 24 | 28 | 26 | 13 | 24 | 16 | 17 |
| Snow days | 9 | 10 | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 5 |
The best time to visit Herkimer County during the most sunny months:
Months with the longest average daylight duration in Herkimer County:
The largest precipitation sum in Herkimer County is at