Average annual temperature is 13.0 °C
Absolute maximum temperature: 37.0 °C
Absolute minimum temperature: -15.0 °C
Number of sunny days: 209 days
Number of rainy days: 145 days
Number of snow days: 11 days
Look at detailed online map of Lewistown
* Weather data for Lewistown 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) | 17.6 | 14.5 | 21.5 | 27.3 | 32.2 | 33.8 | 36.7 | 37.0 | 32.0 | 30.1 | 23.6 | 15.8 |
| Average daytime temperature (°C) | 5.2 | 8.2 | 10.3 | 18.5 | 25.5 | 30.2 | 30.4 | 28.4 | 26.1 | 19.0 | 11.6 | 8.1 |
| Average temperature (°C) | 0.6 | 2.1 | 4.6 | 11.5 | 19.0 | 23.7 | 24.7 | 23.5 | 20.6 | 14.0 | 6.3 | 4.1 |
| Average night temperature (°C) | -2.3 | -2.3 | 0.4 | 5.6 | 13.0 | 17.5 | 19.5 | 19.2 | 16.0 | 10.0 | 1.9 | 1.3 |
| Absolute minimum temperature (°C) | -14.7 | -15.0 | -10.8 | -1.3 | 3.9 | 10.6 | 14.7 | 12.5 | 11.0 | -1.7 | -9.4 | -7.0 |
| 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) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 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 | 7.4 | 6.6 | 9.8 | 11.1 | 12.7 | 12.5 | 10.5 | 9.9 | 7.4 | 7.6 | 4.5 |
| Precipitation (mm) | 44 | 85 | 98 | 69 | 24 | 33 | 80 | 144 | 35 | 60 | 23 | 72 |
| Sunny days | 14 | 18 | 17 | 17 | 21 | 23 | 13 | 13 | 17 | 16 | 22 | 18 |
| Rainy days | 8 | 8 | 14 | 13 | 10 | 7 | 18 | 18 | 13 | 15 | 8 | 13 |
| Snow days | 9 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Lewistown during the most sunny months:
The largest precipitation sum in Lewistown is at