Average annual temperature is 13.3 °C
Absolute maximum temperature: 42.4 °C
Absolute minimum temperature: -9.7 °C
Number of sunny days: 245 days
Number of rainy days: 107 days
Number of snow days: 13 days
Look at detailed online map of City of Mattawa
* Weather data for City of Mattawa 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) | 10.4 | 13.3 | 15.6 | 30.9 | 37.1 | 36.9 | 39.2 | 42.4 | 33.3 | 26.4 | 14.9 | 11.1 |
| Average daytime temperature (°C) | 4.6 | 7.3 | 11.3 | 16.9 | 28.6 | 30.3 | 35.2 | 34.1 | 26.3 | 18.6 | 8.7 | 6.0 |
| Average temperature (°C) | 1.3 | 2.4 | 5.4 | 11.1 | 21.1 | 22.9 | 27.1 | 26.4 | 19.7 | 13.2 | 4.9 | 3.0 |
| Average night temperature (°C) | -1.1 | -1.1 | 1.1 | 5.9 | 15.1 | 16.8 | 19.7 | 20.0 | 14.4 | 8.7 | 2.0 | 0.9 |
| Absolute minimum temperature (°C) | -7.5 | -9.7 | -2.6 | -0.1 | 10.0 | 10.1 | 15.1 | 14.5 | 8.0 | -2.2 | -2.8 | -3.5 |
| 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 | 8.0 |
| Daylight mean duration (h) | 9.0 | 10.3 | 11.9 | 13.6 | 15.0 | 15.8 | 15.4 | 14.2 | 12.6 | 10.9 | 9.4 | 8.6 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 4.9 | 7.0 | 8.6 | 9.4 | 13.0 | 13.2 | 13.9 | 11.5 | 9.9 | 8.4 | 5.5 | 3.2 |
| Precipitation (mm) | 24 | 10 | 28 | 38 | 5 | 4 | 1 | 16 | 11 | 17 | 29 | 59 |
| Sunny days | 14 | 20 | 15 | 12 | 28 | 24 | 29 | 25 | 23 | 24 | 19 | 12 |
| Rainy days | 12 | 4 | 15 | 18 | 3 | 6 | 2 | 6 | 7 | 7 | 10 | 17 |
| Snow days | 5 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit City of Mattawa during the most sunny months:
Months with the longest average daylight duration in City of Mattawa:
The largest precipitation sum in City of Mattawa is at