Lake Armstrong Weather Forecast
- 42
- 51
Rain
- 44
- 52
Rain
- 42
- 55
Rain
- 41
- 50
Rain
- 40
- 51
Rain
- 42
- 50
Rain Likely
- 43
- 54
Rain Likely
Today 6 Dec Lowlands of Western Skagit and Northwestern Snohomish Counties
Breezy. Rain likely. Rainfall Amounts a tenth to a quarter of an inch possible. Highs in the upper 40s to mid 50s. Southwest wind 15 to 25 Mph with Gusts to 45 Mph becoming south 10 to 20 Mph with Gusts to 30 Mph in the afternoon.
Tonight 6 Dec Lowlands of Western Skagit and Northwestern Snohomish Counties
Rain likely in the Evening, then rain at Times after midnight. Rain likely in the morning. Rainfall Amounts less than a tenth of an inch likely. Lows in the lower to mid 40s. South wind 10 to 15 Mph becoming southeast after midnight. Gusts to 25 Mph.
Lake Armstrong Temperature Statistics
December Temperature
Arlington Municipal Airport (4.3 miles)
Lowest 1 December, 2025
30 °FAverage December
40.4 °FHighest 1 December, 2025
44.1 °F
Climate (2020–Present)
Arlington Municipal Airport (4.3 miles)
Average Low 2020–2025
42.5 °FAverage 2020–2025
50.7 °FAverage High 2020–2025
59.7 °F