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Klamath Falls September Weather

Averages and records for weather in Klamath Falls, Oregon in the month of September.

Typical Klamath Falls September Weather 1991–2020
Average daily high	77.6 °F
Average daily low	40.6 °F
Average monthly precipitation	0.3 inches
Daily chance of precipitation	6.8%

Klamath Falls September Weather Records 1887–2024
Highest temperature	103 °F	September 9, 1902
Lowest temperature	20 °F	September 24, 1973
Highest daily low	63 °F	September 15, 1981
Lowest daily high	43 °F	September 29, 1971
Hottest average high temperature	88.4 °F	1902
Coldest average high temperature	66.4 °F	1986
Most daily precipitation	2.3 inches	September 27, 1957
Most monthly precipitation	2.7 inches	1957

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	81.9	44.4	97	30
September 2	81.5	44.0	99	29
September 3	81.0	43.7	100	32
September 4	80.6	43.4	96	32
September 5	80.3	43.2	98	29
September 6	80.1	42.9	99	25
September 7	79.8	42.7	98	31
September 8	79.5	42.4	102	31
September 9	79.3	42.2	103	30
September 10	79.0	42.0	95	27
September 11	78.7	41.7	95	29
September 12	78.5	41.5	94	28
September 13	78.3	41.2	93	21
September 14	78.1	41.0	95	28
September 15	77.9	40.9	94	29
September 16	77.6	40.6	94	28
September 17	77.1	40.4	93	28
September 18	76.6	40.0	91	29
September 19	76.1	39.8	91	29
September 20	75.7	39.5	92	28
September 21	75.2	39.3	90	25
September 22	74.8	39.1	92	25
September 23	74.4	38.7	91	26
September 24	74.1	38.4	89	20
September 25	73.6	38.2	90	26
September 26	73.1	37.9	91	26
September 27	72.5	37.5	91	26
September 28	72.1	37.1	91	25
September 29	71.7	36.9	87	23
September 30	71.5	36.6	89	26

Weather Station Details

Years	Station	Coordinates
2001–2024	Klamath Falls International Airport	location
1887–2000	Klamath Falls 2 SSW	location