Average annual temperature is 11.7 °C
Absolute maximum temperature: 34.0 °C
Absolute minimum temperature: -18.6 °C
Number of sunny days: 165 days
Number of rainy days: 191 days
Number of snow days: 9 days
Look at detailed online map of Borough of Hopatcong
* Weather data for Borough of Hopatcong 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) | 17.3 | 17.6 | 15.4 | 31.3 | 28.3 | 34.0 | 31.8 | 29.5 | 32.6 | 26.9 | 18.1 | 14.6 |
| Average daytime temperature (°C) | 7.0 | 7.3 | 8.8 | 17.7 | 21.1 | 24.8 | 28.3 | 26.0 | 22.8 | 18.1 | 9.7 | 7.8 |
| Average temperature (°C) | 3.5 | 2.1 | 3.6 | 11.6 | 14.6 | 19.0 | 23.3 | 21.2 | 18.3 | 13.5 | 5.2 | 3.9 |
| Average night temperature (°C) | 0.6 | -2.0 | -0.5 | 6.9 | 8.7 | 14.4 | 19.4 | 17.5 | 14.9 | 9.8 | 1.5 | 1.2 |
| Absolute minimum temperature (°C) | -4.9 | -18.6 | -5.7 | -1.1 | 3.4 | 9.0 | 15.3 | 14.1 | 8.7 | 3.7 | -5.2 | -5.9 |
| 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 | 15.1 | 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 | 6.5 | 7.3 | 8.9 | 11.7 | 10.3 | 11.7 | 9.7 | 8.1 | 7.6 | 7.4 | 4.6 |
| Precipitation (mm) | 129 | 48 | 94 | 122 | 50 | 82 | 123 | 98 | 178 | 53 | 80 | 219 |
| Sunny days | 13 | 16 | 13 | 15 | 20 | 10 | 7 | 11 | 13 | 16 | 16 | 15 |
| Rainy days | 17 | 9 | 16 | 15 | 11 | 20 | 24 | 20 | 17 | 15 | 13 | 14 |
| Snow days | 1 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Borough of Hopatcong during the most sunny months:
The largest precipitation sum in Borough of Hopatcong is at