Average annual temperature is 12.5 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -16.1 °C
Number of sunny days: 168 days
Number of rainy days: 191 days
Number of snow days: 6 days
Look at detailed online map of Mendham
* Weather data for Mendham 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) | 18.4 | 19.3 | 15.6 | 32.2 | 29.5 | 35.1 | 33.7 | 31.3 | 33.5 | 27.7 | 19.5 | 15.8 |
| Average daytime temperature (°C) | 8.1 | 8.3 | 10.2 | 18.8 | 22.4 | 26.3 | 29.8 | 27.3 | 23.8 | 19.1 | 10.8 | 8.6 |
| Average temperature (°C) | 4.3 | 3.1 | 4.7 | 12.4 | 15.8 | 19.9 | 24.0 | 22.2 | 19.0 | 14.1 | 5.8 | 4.5 |
| Average night temperature (°C) | 1.0 | -1.2 | 0.3 | 7.3 | 9.6 | 15.0 | 19.4 | 18.0 | 15.4 | 10.2 | 1.7 | 1.4 |
| Absolute minimum temperature (°C) | -4.3 | -16.1 | -5.0 | -0.5 | 3.7 | 9.4 | 15.6 | 14.6 | 9.4 | 4.5 | -5.0 | -5.2 |
| 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 | 10.7 | 11.9 | 13.3 | 14.5 | 15.0 | 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) | 4.8 | 6.8 | 7.3 | 8.9 | 11.8 | 10.6 | 11.6 | 10.1 | 8.0 | 7.8 | 7.5 | 4.7 |
| Precipitation (mm) | 130 | 40 | 105 | 116 | 34 | 97 | 153 | 109 | 205 | 78 | 82 | 212 |
| Sunny days | 12 | 17 | 12 | 14 | 18 | 9 | 9 | 12 | 14 | 18 | 18 | 15 |
| Rainy days | 17 | 10 | 18 | 16 | 13 | 21 | 22 | 19 | 16 | 13 | 12 | 14 |
| Snow days | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Mendham during the most sunny months:
The largest precipitation sum in Mendham is at