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Corvallis September Weather

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

Typical Corvallis September Weather 1991–2020
Average daily high	77.6 °F
Average daily low	48.3 °F
Average monthly precipitation	1.5 inches
Average monthly snow	none
Daily chance of precipitation	23.4%
Daily chance of snow	0%

Corvallis September Weather Records 1893–2024
Highest temperature	103 °F	September 3, 1988
Lowest temperature	27 °F	September 24, 2000
Highest daily low	73 °F	September 2, 1915
Lowest daily high	49 °F	September 30, 1971
Hottest average high temperature	85.0 °F	1918
Coldest average high temperature	64.4 °F	1911
Most daily precipitation	2.9 inches	September 6, 2013
Most monthly precipitation	7.1 inches	2013
Most daily snow	none	-
Most monthly snow	none	-

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	81.2	50.3	101	37
September 2	80.9	50.2	99	37
September 3	80.5	50.1	103	38
September 4	80.2	50.0	96	39
September 5	79.9	49.9	103	37
September 6	79.6	49.8	98	37
September 7	79.4	49.6	97	37
September 8	79.3	49.5	98	36
September 9	79.0	49.4	97	34
September 10	78.8	49.2	101	36
September 11	78.6	49.0	96	36
September 12	78.3	48.9	94	34
September 13	78.0	48.7	95	33
September 14	77.9	48.5	98	33
September 15	77.8	48.4	94	34
September 16	77.6	48.3	98	35
September 17	77.3	48.1	92	33
September 18	76.9	47.9	93	34
September 19	76.4	47.8	91	34
September 20	76.0	47.6	94	36
September 21	75.6	47.5	95	30
September 22	75.3	47.3	95	31
September 23	74.9	47.1	95	35
September 24	74.6	46.8	93	27
September 25	74.2	46.6	97	30
September 26	73.7	46.3	93	32
September 27	73.2	46.1	94	32
September 28	72.7	45.8	98	32
September 29	72.2	45.5	89	34
September 30	71.8	45.3	88	32

Weather Station Details

Years	Station	Coordinates
1893–2024	Corvallis State University	location