Clear Lake National Wildlife Refuge Weather Forecast
- 45
- 69
Slight Chance Thunderstorms
- 45
- 66
Chance Rain Showers
- 45
- 70
Mostly Sunny
- 47
- 74
Mostly Sunny
- 48
- 77
Partly Sunny
- 47
- 76
Mostly Sunny
Today 16 Sep Northeast Siskiyou and Northwest Modoc Counties
Mostly cloudy with a chance of Showers and slight chance of Thunderstorms early this Morning, then partly cloudy with a slight chance of Thunderstorms in the late morning and afternoon. Highs around 70. Northeast Winds 5 to 10 Mph shifting to the east this afternoon. Chance of precipitation 40 percent.
Tonight 16 Sep Northeast Siskiyou and Northwest Modoc Counties
Partly cloudy. Slight chance of Thunderstorms in the Evening, then slight chance of Showers after midnight. Lows in the lower to mid 40s. Northeast Winds 5 to 10 Mph shifting to the northwest late in the evening and overnight. Chance of precipitation 20 percent.
Clear Lake National Wildlife Refuge Temperature Statistics
September Temperature
Klamath Falls International Airport (36 miles)
Lowest 7 September, 2026
31.6 °FAverage September
54.1 °FHighest 10 September, 2026
86.6 °F
Climate (2021–2026)
Klamath Falls International Airport (36 miles)
Average Low 2021–2026
33.9 °FAverage 2021–2026
48.6 °FAverage High 2021–2026
63.3 °F