Mattawa Weather Forecast
- 39
- 65
Chance Rain
- 41
- 57
Rain
- 35
- 51
Rain Likely
- 34
- 44
Rain
- 30
- 45
Slight Chance Rain/Snow
- 30
- 44
Chance Rain/Snow
Today 15 Dec Moses Lake Area
Rain in the Morning, then partly sunny with a chance of rain in the afternoon. Highs in the mid 50s to lower 60s. Windy. South wind 15 to 25 Mph. Gusts up to 30 Mph increasing to 40 Mph in the afternoon. Chance of precipitation near 100 percent. Rainfall Amounts less than a quarter of an inch.
Tonight 15 Dec Moses Lake Area
Partly cloudy. A chance of rain in the evening. Lows in the mid 30s to lower 40s. Windy. Southwest wind 15 to 25 Mph with Gusts up to 35 Mph. Chance of precipitation 20 percent.
Mattawa Temperature Statistics
December Temperature
Sunnyside Municipal Airport (28.6 miles)
Lowest 12 December, 2025
37.9 °FAverage December
54.1 °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