Average annual temperature is 11.7 °C
Absolute maximum temperature: 33.8 °C
Absolute minimum temperature: -19.1 °C
Number of sunny days: 161 days
Number of rainy days: 194 days
Number of snow days: 10 days
Look at detailed online map of Passaic County
* Weather data for Passaic 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) | 17.4 | 18.0 | 14.5 | 31.4 | 28.3 | 33.8 | 32.0 | 29.5 | 33.2 | 26.7 | 18.5 | 15.0 |
| Average daytime temperature (°C) | 7.1 | 7.1 | 8.8 | 17.7 | 21.2 | 24.9 | 28.4 | 26.0 | 23.0 | 18.2 | 9.8 | 7.8 |
| Average temperature (°C) | 3.5 | 2.0 | 3.8 | 11.6 | 14.9 | 19.1 | 23.2 | 21.3 | 18.4 | 13.4 | 5.1 | 3.9 |
| Average night temperature (°C) | 0.5 | -2.1 | -0.2 | 6.7 | 9.3 | 14.6 | 19.1 | 17.4 | 14.9 | 9.8 | 1.2 | 0.8 |
| Absolute minimum temperature (°C) | -4.5 | -19.1 | -5.0 | -1.8 | 3.9 | 9.4 | 15.7 | 14.7 | 8.8 | 3.7 | -5.2 | -6.1 |
| 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) | 4.9 | 6.3 | 7.6 | 8.8 | 11.8 | 10.4 | 11.6 | 9.8 | 7.8 | 7.5 | 7.5 | 4.7 |
| Precipitation (mm) | 132 | 46 | 110 | 144 | 47 | 90 | 142 | 104 | 192 | 98 | 93 | 255 |
| Sunny days | 12 | 16 | 12 | 15 | 20 | 12 | 6 | 8 | 12 | 16 | 17 | 15 |
| Rainy days | 17 | 9 | 17 | 15 | 11 | 18 | 25 | 23 | 18 | 15 | 12 | 14 |
| Snow days | 2 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Passaic County during the most sunny months:
The largest precipitation sum in Passaic County is at