Average annual temperature is 8.0 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: -15.3 °C
Number of sunny days: 220 days
Number of rainy days: 105 days
Number of snow days: 40 days
Look at detailed online map of Portola
* Weather data for Portola 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) | 8.8 | 12.6 | 8.0 | 21.1 | 27.9 | 30.2 | 36.9 | 33.9 | 27.4 | 25.3 | 19.2 | 12.2 |
| Average daytime temperature (°C) | 1.6 | 3.9 | 3.6 | 11.6 | 18.1 | 22.5 | 31.6 | 29.0 | 22.5 | 17.9 | 10.2 | 7.3 |
| Average temperature (°C) | -2.6 | -1.8 | -0.9 | 4.1 | 10.4 | 14.5 | 21.9 | 19.9 | 14.2 | 10.0 | 3.7 | 1.7 |
| Average night temperature (°C) | -5.9 | -5.9 | -4.4 | -1.7 | 3.7 | 7.3 | 12.8 | 12.2 | 7.9 | 4.3 | -0.6 | -1.9 |
| Absolute minimum temperature (°C) | -15.3 | -12.5 | -9.9 | -9.7 | -1.9 | 2.7 | 7.3 | 8.6 | 2.9 | -2.5 | -5.8 | -7.6 |
| 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) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 14.9 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 5.3 | 7.6 | 7.6 | 11.3 | 12.1 | 12.9 | 13.7 | 12.0 | 10.6 | 9.5 | 7.9 | 6.2 |
| Precipitation (mm) | 220 | 116 | 199 | 26 | 54 | 55 | 0 | 17 | 49 | 16 | 45 | 51 |
| Sunny days | 12 | 14 | 7 | 24 | 11 | 14 | 30 | 25 | 20 | 24 | 22 | 17 |
| Rainy days | 9 | 2 | 9 | 4 | 20 | 16 | 1 | 6 | 10 | 7 | 8 | 13 |
| Snow days | 10 | 12 | 15 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Portola during the most sunny months:
The largest precipitation sum in Portola is at