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Chelan September Weather

Averages and records for weather in Chelan, Washington in the month of September.

Typical Chelan September Weather 1991–2020
Average daily high	76.1 °F
Average daily low	51.5 °F
Average monthly precipitation	0.3 inches
Average monthly snow	none
Daily chance of precipitation	7.6%
Daily chance of snow	0%

Chelan September Weather Records 1890–2024
Highest temperature	97 °F	September 2, 2022
Lowest temperature	26 °F	September 29, 1983
Highest daily low	68 °F	September 1, 2001
Lowest daily high	46 °F	September 30, 2019
Hottest average high temperature	82.6 °F	1998
Coldest average high temperature	69.4 °F	1959
Most daily precipitation	1.2 inches	September 23, 1973
Most monthly precipitation	2.5 inches	1959
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	81.3	56.1	97	44
September 2	81.0	55.7	97	43
September 3	80.5	55.4	95	42
September 4	80.2	55.1	92	43
September 5	79.7	54.8	92	42
September 6	79.4	54.6	97	39
September 7	79.0	54.3	92	42
September 8	78.7	54.0	94	38
September 9	78.4	53.7	89	39
September 10	78.1	53.4	88	40
September 11	77.8	53.1	91	39
September 12	77.5	52.8	91	35
September 13	77.1	52.5	94	35
September 14	76.8	52.2	93	39
September 15	76.5	51.9	91	39
September 16	76.1	51.5	90	39
September 17	75.8	51.2	90	37
September 18	75.4	50.9	87	38
September 19	75.0	50.6	92	36
September 20	74.5	50.3	91	27
September 21	74.1	50.0	85	31
September 22	73.7	49.6	87	33
September 23	73.3	49.3	87	34
September 24	73.0	49.0	86	35
September 25	72.5	48.6	89	34
September 26	72.0	48.3	90	39
September 27	71.4	47.9	89	29
September 28	70.7	47.6	85	27
September 29	70.2	47.3	86	26
September 30	69.7	47.0	82	33

Weather Station Details

Years	Station	Coordinates
1890–2024	Chelan	location