Average annual temperature is 12.3 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -16.8 °C
Number of sunny days: 172 days
Number of rainy days: 186 days
Number of snow days: 7 days
Look at detailed online map of Hackettstown
* Weather data for Hackettstown 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) | 18.0 | 18.5 | 15.9 | 31.9 | 29.0 | 34.9 | 32.7 | 30.5 | 32.8 | 27.7 | 18.7 | 15.0 |
| Average daytime temperature (°C) | 7.6 | 8.1 | 9.7 | 18.7 | 22.1 | 25.7 | 29.3 | 26.8 | 23.5 | 18.7 | 10.2 | 8.2 |
| Average temperature (°C) | 4.0 | 2.8 | 4.3 | 12.3 | 15.4 | 19.7 | 23.8 | 21.8 | 18.8 | 13.9 | 5.5 | 4.4 |
| Average night temperature (°C) | 0.9 | -1.4 | 0.0 | 7.3 | 9.3 | 14.8 | 19.4 | 17.8 | 15.1 | 10.0 | 1.6 | 1.4 |
| Absolute minimum temperature (°C) | -4.2 | -16.8 | -5.4 | -0.3 | 3.6 | 9.8 | 15.3 | 13.6 | 8.9 | 3.5 | -5.3 | -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) | 4.5 | 6.8 | 7.2 | 8.8 | 11.6 | 10.6 | 11.9 | 9.7 | 8.1 | 7.9 | 7.4 | 4.6 |
| Precipitation (mm) | 125 | 41 | 90 | 108 | 45 | 94 | 161 | 98 | 181 | 55 | 75 | 212 |
| Sunny days | 14 | 16 | 13 | 14 | 21 | 12 | 8 | 12 | 13 | 16 | 18 | 15 |
| Rainy days | 16 | 8 | 18 | 16 | 10 | 18 | 23 | 19 | 17 | 15 | 12 | 14 |
| Snow days | 1 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Hackettstown during the most sunny months:
The largest precipitation sum in Hackettstown is at