Average annual temperature is 9.0 °C
Absolute maximum temperature: 36.5 °C
Absolute minimum temperature: -25.7 °C
Number of sunny days: 188 days
Number of rainy days: 143 days
Number of snow days: 34 days
Look at detailed online map of Lewiston
* Weather data for Lewiston 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) | 4.0 | 8.2 | 12.2 | 25.5 | 30.3 | 30.1 | 33.8 | 36.5 | 33.2 | 28.8 | 16.8 | 11.1 |
| Average daytime temperature (°C) | -2.2 | 0.7 | 4.4 | 13.0 | 22.3 | 27.0 | 26.9 | 27.4 | 24.2 | 14.7 | 7.4 | 4.3 |
| Average temperature (°C) | -6.0 | -4.9 | -0.9 | 7.0 | 15.7 | 21.1 | 21.3 | 21.8 | 18.8 | 10.4 | 2.7 | 0.4 |
| Average night temperature (°C) | -9.1 | -9.2 | -5.1 | 2.4 | 9.9 | 15.5 | 16.0 | 17.2 | 14.7 | 7.1 | -1.0 | -2.1 |
| Absolute minimum temperature (°C) | -25.1 | -25.7 | -18.6 | -5.2 | -1.1 | 7.2 | 10.3 | 11.3 | 7.6 | -6.2 | -13.9 | -8.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.3 | 10.5 | 11.9 | 13.5 | 14.7 | 15.4 | 15.1 | 14.0 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 3.9 | 6.5 | 7.1 | 8.0 | 11.6 | 12.8 | 12.4 | 11.4 | 9.0 | 7.1 | 6.7 | 4.3 |
| Precipitation (mm) | 48 | 53 | 67 | 100 | 77 | 32 | 57 | 73 | 150 | 122 | 7 | 31 |
| Sunny days | 17 | 16 | 15 | 12 | 18 | 15 | 11 | 19 | 12 | 14 | 22 | 17 |
| Rainy days | 6 | 5 | 8 | 16 | 13 | 15 | 20 | 12 | 18 | 14 | 7 | 9 |
| Snow days | 8 | 7 | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 5 |
The best time to visit Lewiston during the most sunny months:
Months with the longest average daylight duration in Lewiston:
The largest precipitation sum in Lewiston is at