Average annual temperature is 12.5 °C
Absolute maximum temperature: 35.0 °C
Absolute minimum temperature: -16.9 °C
Number of sunny days: 166 days
Number of rainy days: 194 days
Number of snow days: 5 days
Look at detailed online map of Borough of Morris Plains
* Weather data for Borough of Morris Plains 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) | 18.2 | 19.0 | 15.5 | 32.5 | 29.4 | 35.0 | 33.3 | 31.2 | 33.9 | 27.6 | 19.2 | 15.7 |
| Average daytime temperature (°C) | 7.9 | 8.1 | 9.8 | 18.7 | 22.2 | 25.9 | 29.5 | 27.1 | 23.6 | 18.9 | 10.5 | 8.4 |
| Average temperature (°C) | 4.2 | 2.9 | 4.5 | 12.4 | 15.7 | 19.8 | 23.9 | 22.1 | 19.0 | 14.1 | 5.8 | 4.5 |
| Average night temperature (°C) | 1.1 | -1.2 | 0.2 | 7.4 | 9.8 | 15.0 | 19.6 | 18.1 | 15.4 | 10.4 | 1.9 | 1.4 |
| Absolute minimum temperature (°C) | -4.3 | -16.9 | -5.0 | -0.8 | 4.0 | 9.8 | 16.0 | 14.7 | 9.4 | 4.5 | -4.9 | -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 | 10.6 | 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) | 4.6 | 6.6 | 7.3 | 8.8 | 11.8 | 10.6 | 11.5 | 9.9 | 7.9 | 7.7 | 7.5 | 4.7 |
| Precipitation (mm) | 133 | 41 | 103 | 120 | 41 | 100 | 127 | 93 | 217 | 85 | 82 | 216 |
| Sunny days | 13 | 17 | 12 | 14 | 20 | 8 | 7 | 11 | 16 | 16 | 18 | 14 |
| Rainy days | 17 | 9 | 18 | 16 | 11 | 22 | 24 | 20 | 14 | 15 | 12 | 16 |
| Snow days | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Borough of Morris Plains during the most sunny months:
The largest precipitation sum in Borough of Morris Plains is at