Diablo Lake Weather Forecast
- 39
- 44
Rain/Snow
- 38
- 42
Rain/Snow
- 41
- 43
Rain/Snow
- 40
- 46
Rain
- 39
- 44
Rain/Snow
- 38
- 45
Rain/Snow
- 38
- 43
Rain/Snow
Today 5 Dec Foothills and Valleys of the North Cascades
Rain likely in the Morning, then rain in the late morning and early afternoon. Rain likely late in the afternoon. Rainfall Amounts a half inch to one inch possible. Highs near 50. Southeast wind to 10 Mph with Gusts to 20 Mph becoming south with Gusts to 30 Mph in the afternoon.
Tonight 5 Dec Foothills and Valleys of the North Cascades
Mostly cloudy with a chance of rain in the Evening, then rain after midnight. Rainfall Amounts one to three Inches possible. Lows in the lower to mid 40s. Southwest wind 10 to 20 Mph with Gusts to 40 Mph.
Diablo Lake Temperature Statistics
December Temperature
Arlington Municipal Airport (60.9 miles)
Lowest 1 December, 2025
30 °FAverage December
39.8 °FHighest 1 December, 2025
44.1 °F
Climate (2020–Present)
Arlington Municipal Airport (60.9 miles)
Average Low 2020–2025
42.5 °FAverage 2020–2025
50.7 °FAverage High 2020–2025
59.8 °F