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Sedro-Woolley September Weather

Averages and records for weather in Sedro-Woolley, Washington in the month of September.

Typical Sedro-Woolley September Weather 1991–2020
Average daily high	69.9 °F
Average daily low	49.3 °F
Average monthly precipitation	2.9 inches
Average monthly snow	none
Daily chance of precipitation	40.6%
Daily chance of snow	0%

Sedro-Woolley September Weather Records 1896–2024
Highest temperature	91 °F	September 5, 1944
Lowest temperature	28 °F	September 26, 1912
Highest daily low	65 °F	September 10, 1899
Lowest daily high	51 °F	September 23, 1908
Hottest average high temperature	75.5 °F	1974
Coldest average high temperature	62.7 °F	1914
Most daily precipitation	3.3 inches	September 1, 2016
Most monthly precipitation	8.3 inches	1903
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	73.3	51.6	90	39
September 2	73.0	51.5	87	38
September 3	72.8	51.4	87	37
September 4	72.5	51.2	89	39
September 5	72.2	51.1	91	37
September 6	71.9	51.0	89	38
September 7	71.7	50.8	89	36
September 8	71.4	50.7	88	35
September 9	71.2	50.6	85	34
September 10	71.0	50.4	88	33
September 11	70.8	50.2	85	35
September 12	70.5	50.1	90	34
September 13	70.3	49.8	85	32
September 14	70.1	49.6	89	34
September 15	69.9	49.4	89	34
September 16	69.8	49.3	86	32
September 17	69.6	49.1	88	32
September 18	69.3	48.9	84	31
September 19	68.9	48.7	89	35
September 20	68.6	48.5	83	34
September 21	68.4	48.3	89	35
September 22	68.1	48.1	84	34
September 23	67.8	47.9	84	30
September 24	67.5	47.7	89	31
September 25	67.1	47.5	84	28
September 26	66.8	47.4	80	28
September 27	66.3	47.1	83	30
September 28	66.0	46.9	86	29
September 29	65.6	46.7	87	29
September 30	65.4	46.5	82	32

Weather Station Details

Years	Station	Coordinates
1896–2024	Sedro-Woolley	location