Average annual temperature is 14.1 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: 0.1 °C
Number of sunny days: 257 days
Number of rainy days: 108 days
Look at detailed online map of Napa Junction
* Weather data for Napa Junction 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 | 19.1 | 18.3 | 26.9 | 27.8 | 29.3 | 36.0 | 36.7 | 30.4 | 34.0 | 25.2 | 19.1 |
| Average daytime temperature (°C) | 14.0 | 13.7 | 13.7 | 19.1 | 20.5 | 23.3 | 29.4 | 29.9 | 25.6 | 25.6 | 19.0 | 15.5 |
| Average temperature (°C) | 9.3 | 7.9 | 9.0 | 12.3 | 14.3 | 16.5 | 19.5 | 20.6 | 18.3 | 17.6 | 12.7 | 10.5 |
| Average night temperature (°C) | 6.2 | 3.8 | 5.4 | 7.3 | 10.6 | 12.2 | 13.6 | 15.3 | 14.1 | 12.2 | 8.1 | 7.1 |
| Absolute minimum temperature (°C) | 0.1 | 0.9 | 1.0 | 2.4 | 6.6 | 9.7 | 11.4 | 12.8 | 11.8 | 5.4 | 2.5 | 2.2 |
| 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 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.6 |
| 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) | 5.7 | 7.7 | 7.7 | 11.3 | 11.5 | 12.8 | 13.0 | 12.0 | 10.6 | 9.3 | 7.9 | 5.9 |
| Precipitation (mm) | 344 | 84 | 286 | 6 | 19 | 2 | 0 | 1 | 5 | 10 | 53 | 136 |
| Sunny days | 12 | 16 | 10 | 27 | 21 | 28 | 30 | 28 | 24 | 24 | 21 | 16 |
| Rainy days | 19 | 12 | 21 | 3 | 10 | 2 | 1 | 3 | 6 | 7 | 9 | 15 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Napa Junction during the most sunny months:
The largest precipitation sum in Napa Junction is at