Gem Lake Weather Forecast
- 39
- 45
Rain
- 37
- 45
Rain
- 35
- 41
Rain/Snow
- 34
- 39
Rain/Snow
- 34
- 43
Mostly Cloudy
- 37
- 47
Mostly Cloudy
- 38
- 50
Partly Sunny
Today 13 May Cascades of Southern King County
A slight chance of snow Showers in the morning. Rain Showers through the day. Snow Showers in the afternoon. Snow level near 6000 feet. Rainfall Amounts a half inch to one inch possible. No snow accumulation. Afternoon pass Temperatures in the mid 40s. West wind in the Passes to 10 Mph increasing to 10 to 15 Mph in the Afternoon, Gusts to 20 Mph increasing to 30 Mph in the afternoon.
Tonight 13 May Cascades of Southern King County
Mostly cloudy. Rain and snow likely in the Evening, then a chance of rain and snow after midnight. Snow level near 5500 feet. Rainfall Amounts a tenth to a quarter of an inch possible. No snow accumulation. West wind in the Passes 10 to 15 Mph with Gusts to 35 Mph.
Gem Lake Temperature Statistics
May Temperature
Stampede Pass (14.9 miles)
Lowest 7 May, 2026
37.9 °FAverage May
52.1 °FHighest 3 May, 2026
71.1 °F
Climate (2021–Present)
Stampede Pass (14.9 miles)
Average Low 2021–2026
36.3 °FAverage 2021–2026
41.6 °FAverage High 2021–2026
48.4 °F