Swartz Lake Weather Forecast
- 44
- 65
Increasing Clouds
- 46
- 71
Mostly Sunny
- 51
- 82
Partly Sunny
- 49
- 70
Chance Rain
- 46
- 67
Chance Rain
- 42
- 60
Rain Likely
- 42
- 59
Chance Rain
Today 10 May Foothills and Valleys of the North Cascades
Mostly cloudy until late afternoon then becoming mostly sunny. Highs in the 60s. North wind to 10 Mph becoming west in the Afternoon, Gusts to 25 Mph in the afternoon.
Tonight 10 May Foothills and Valleys of the North Cascades
Partly cloudy. Lows in the mid to upper 40s. South wind 10 to 15 Mph in the evening becoming light.
Swartz Lake Temperature Statistics
May Temperature
Arlington Municipal Airport (11.8 miles)
Lowest 1 May, 2026
46 °FAverage May
59 °FHighest 4 May, 2026
79 °F
Climate (2021–Present)
Arlington Municipal Airport (11.8 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
50.9 °FAverage High 2021–2026
59.9 °F