Collier Memorial State Park Weather Forecast
- 32
- 60
Chance Rain
- 35
- 66
Chance Rain
- 33
- 63
Chance Rain
- 34
- 68
Slight Chance Rain
- 38
- 75
Mostly Sunny
- 40
- 78
Mostly Sunny
Today 4 Sep Klamath Basin
Partly cloudy with a slight chance of Thunderstorms in the Morning, then mostly cloudy with a chance of rain Showers and slight chance of Thunderstorms in the afternoon. Snow level 7000 feet in the afternoon. Highs in the mid 50s to lower 60s. South Winds around 5 Mph shifting to the southwest in the afternoon. Chance of precipitation 30 percent.
Tonight 4 Sep Klamath Basin
Mostly cloudy with a slight chance of Thunderstorms in the Evening, then partly cloudy with a slight chance of rain Showers after midnight. Lows in the lower 30s to lower 40s. West Winds 5 to 10 Mph shifting to the southeast well after midnight. Chance of precipitation 20 percent.
Collier Memorial State Park Temperature Statistics
September Temperature
Klamath Falls International Airport (34.8 miles)
Lowest 1 September, 2026
39.9 °FAverage September
56.5 °FHighest 1 September, 2026
71.1 °F
Climate (2021–2026)
Klamath Falls International Airport (34.8 miles)
Average Low 2021–2026
33.9 °FAverage 2021–2026
48.6 °FAverage High 2021–2026
63.4 °F