Average temperature in May is 14.1 °C
Average daytime temperature is 20.7 °C
Average night temperature is 8.1 °C
Absolute maximum temperature: 27 °C
Absolute minimum temperature: 3 °C
Number of sunny days: 11
Number of rainy days: 20
Number of snow days:
Precipitation sum: 79 mm
* Weather data for Lewistown United States is based on climate observations for 2023 year
| May (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 21.1 | 25.7 | 24.9 | 25.6 | 24.7 | 16 | 15 | 14.7 | 17.9 | 17.6 | 16.2 | 15.9 | 15.1 | 16.9 | 23.5 | 23.3 | 23.3 | 16.8 | 23.6 | 25 | 27 | 25.8 | 23.1 | 22 | 19.7 | 18.2 | 17.5 | 18.6 | 22.5 | 23.3 | 22.3 |
| Apparent max temperature | 17.8 | 24.5 | 23.2 | 21 | 18.7 | 15.3 | 14.3 | 12.4 | 17.2 | 16.1 | 13.3 | 13 | 11.8 | 12.1 | 24 | 21.6 | 20.4 | 13.7 | 22.7 | 24.6 | 26.6 | 25 | 21.2 | 21.6 | 19.5 | 18.7 | 17 | 18.4 | 21.9 | 23 | 23.4 |
| Mean temperature | 13.2 | 15.2 | 17.7 | 17.6 | 15.6 | 10.8 | 9 | 10 | 9.9 | 9.6 | 11 | 10.2 | 9.6 | 11.1 | 14.5 | 17.5 | 14.9 | 12 | 12.9 | 18.6 | 18.7 | 19.8 | 16.9 | 17.1 | 14.6 | 13.8 | 13.6 | 13.3 | 15.2 | 17.2 | 17.1 |
| Apparent mean temperature | 0.1 | 0.9 | 7.5 | 6.6 | 5.9 | 3.8 | 0.3 | 0.7 | 0.2 | -0.3 | 6.5 | 1.8 | 3.9 | 4.6 | 5.4 | 7.3 | 7 | 3.1 | 0.3 | 8.2 | 7.1 | 10.9 | 9.2 | 10.7 | 8.5 | 9.7 | 10.4 | 5.9 | 6.1 | 8.1 | 8.4 |
| Minimum temperature | 3.8 | 5.4 | 10.9 | 9.9 | 10.6 | 5.9 | 3 | 4.6 | 3.2 | 3.4 | 8.7 | 4.5 | 5.7 | 7.5 | 7.4 | 10.4 | 9.6 | 5.7 | 3.1 | 11.8 | 9.1 | 13.4 | 11.6 | 12.5 | 10 | 10.4 | 11.1 | 7.3 | 8.6 | 11 | 10.6 |
| Apparent min temperature | 9.3 | 11.1 | 15.2 | 14.1 | 11.9 | 9 | 7.2 | 6.7 | 7.5 | 7.2 | 8.8 | 7.8 | 7.3 | 8 | 12.7 | 15.2 | 12.5 | 9.3 | 10.5 | 16.4 | 17.1 | 18.2 | 15 | 15.8 | 13.7 | 13 | 12.7 | 12.3 | 13.6 | 15.9 | 15.5 |
| May | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 14.4 | 14.5 | 14.5 | 14.6 | 14.6 | 14.7 | 14.7 | 14.8 | 14.8 | 14.8 | 14.9 | 14.9 | 15 | 15 | 15.1 | 15.1 | 15.1 | 15.2 | 15.2 | 15.3 | 15.3 | 15.3 | 15.4 | 15.4 | 15.4 | 15.5 | 15.5 | 15.5 | 15.6 | 15.6 | 15.6 |
| Sunshine duration (h) | 13.4 | 13.4 | 12.6 | 12.5 | 10.2 | 10 | 13.6 | 13.3 | 12 | 13.6 | 1.2 | 13.3 | 3 | 5.5 | 12.8 | 13.4 | 12.1 | 13.8 | 13.9 | 14 | 14 | 13.9 | 12.9 | 13.6 | 10.5 | 5.4 | 9.5 | 12.6 | 14.4 | 14.2 | 13.5 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 5.6 | 16.6 | 1.2 | 0.1 | 3 | 0 | 3 | 2 | 1.8 | 0.1 | 0 | 1.4 | 0.9 | 0 | 0 | 0.1 | 0.9 | 0.1 | 0 | 4.2 | 4.2 | 14.7 | 14.8 | 4.4 | 0 | 0 | 0.1 |
| Precipitation hours | 0 | 0 | 0 | 0 | 6 | 17 | 2 | 1 | 2 | 0 | 11 | 8 | 7 | 1 | 0 | 3 | 4 | 0 | 0 | 1 | 1 | 1 | 0 | 4 | 8 | 7 | 15 | 3 | 0 | 0 | 1 |
| Wind speed (m/s) | 26.3 | 25.8 | 18.2 | 26 | 24.5 | 19.4 | 11.4 | 13.2 | 15.2 | 12.6 | 13 | 17.7 | 17 | 29.2 | 27.4 | 19.2 | 19.9 | 20.2 | 14.6 | 15.8 | 27.6 | 12.5 | 21 | 16.1 | 12 | 13.6 | 13.5 | 16.6 | 18.7 | 13 | 19.5 |
In May 2023, the highest daytime temperature in Lewistown was 27°C.
While the minimum temperature at night dropped to 3°C.
The average nighttime and daytime temperatures during May in Lewistown are 8.1°C and 20.7°C respectively.
The precipitation sum in May is about 79 mm.