Speelyi Beach Park Weather Forecast
- 43
- 67
Decreasing Clouds
- 46
- 70
Increasing Clouds
- 47
- 66
Partly Sunny
- 50
- 76
Mostly Sunny
- 53
- 83
Mostly Sunny
- 51
- 78
Partly Sunny
- 49
- 73
Slight Chance Rain Showers
Today 5 Sep Lower Slopes of the Eastern Washington Cascades Crest
Mostly cloudy. A chance of rain Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Highs in the mid 50s to mid 60s, except in the mid 60s to lower 70s Valleys. Light wind. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.
Tonight 5 Sep Lower Slopes of the Eastern Washington Cascades Crest
Partly cloudy. Lows in the upper 30s to upper 40s. Light wind.
Speelyi Beach Park Temperature Statistics
September Temperature
Stampede Pass (12.4 miles)
Lowest 3 September, 2026
39.9 °FAverage September
47 °FHighest 1 September, 2026
61 °F
Climate (2021–2026)
Stampede Pass (12.4 miles)
Average Low 2021–2026
36.2 °FAverage 2021–2026
41.5 °FAverage High 2021–2026
48.3 °F