Mattawa Weather Forecast
- 40
- 59
Mostly Cloudy
- 39
- 53
Partly Sunny
- 42
- 53
Mostly Cloudy
- 43
- 59
Rain Likely
- 37
- 57
Rain Likely
- 35
- 50
Rain Likely
- 34
- 46
Rain Likely
Today 12 Dec Moses Lake Area
Mostly cloudy. Highs in the 50s. Southwest wind 5 to 15 Mph.
Tonight 12 Dec Moses Lake Area
Mostly cloudy. Lows in the upper 30s to lower 40s. Southwest wind 5 to 15 Mph.
Mattawa Temperature Statistics
December Temperature
Sunnyside Municipal Airport (28.6 miles)
Lowest 10 December, 2025
40.6 °FAverage December
56.4 °FHighest 10 December, 2025
68 °F
Climate (2020–Present)
Sunnyside Municipal Airport (28.6 miles)
Average Low 2020–2025
38.9 °FAverage 2020–2025
51.4 °FAverage High 2020–2025
63.5 °F