Swartz Lake Weather Forecast
- 35
- 47
Chance Rain/Snow
- 33
- 50
Chance Rain/Snow
- 38
- 52
Rain
- 38
- 52
Rain
- 35
- 50
Rain
- 33
- 50
Chance Rain/Snow
Today 21 Mar Foothills and Valleys of the North Cascades
Mostly sunny. A chance of rain and snow in the Morning, then a slight chance of snow late in the morning. A slight chance of rain in the late morning and early afternoon. Snow level near 1500 feet. Highs in the mid 40s to lower 50s. Northwest wind to 10 Mph becoming west with Gusts to 20 Mph in the afternoon.
Tonight 21 Mar Foothills and Valleys of the North Cascades
Mostly clear in the Evening, then mostly cloudy with a slight chance of rain after midnight. Mostly cloudy with a chance of rain and snow in the morning. Snow level near 1500 feet. Lows in the mid to upper 30s. South wind to 10 Mph becoming southeast after midnight.
Swartz Lake Temperature Statistics
March Temperature
Arlington Municipal Airport (11.8 miles)
Lowest 2 March, 2026
27 °FAverage March
44.8 °FHighest 2 March, 2026
59 °F
Climate (2021–Present)
Arlington Municipal Airport (11.8 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
50.8 °FAverage High 2021–2026
59.9 °F