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Pullman September Weather

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

Typical Pullman September Weather 1991–2020
Average daily high	75.3 °F
Average daily low	44.7 °F
Average monthly precipitation	0.6 inches
Average monthly snow	none
Daily chance of precipitation	15.2%
Daily chance of snow	0%

Pullman September Weather Records 1940–2024
Highest temperature	103 °F	September 1, 2022
Lowest temperature	20 °F	September 29, 1983
Highest daily low	68 °F	September 13, 1959
Lowest daily high	40 °F	September 30, 2019
Hottest average high temperature	82.9 °F	1990
Coldest average high temperature	63.0 °F	1941
Most daily precipitation	1.6 inches	September 16, 1947
Most monthly precipitation	4.2 inches	1947
Most daily snow	1.0 inches	September 29, 2019
Most monthly snow	1.0 inches	2019

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	80.3	47.5	103	32
September 2	80.0	47.3	100	31
September 3	79.6	47.1	98	32
September 4	79.1	46.9	100	31
September 5	78.7	46.7	97	32
September 6	78.2	46.5	97	35
September 7	77.9	46.2	96	33
September 8	77.5	45.9	94	28
September 9	77.2	45.7	96	31
September 10	76.9	45.6	95	32
September 11	76.5	45.4	95	31
September 12	76.2	45.2	96	28
September 13	75.8	44.9	97	30
September 14	75.5	44.7	91	24
September 15	75.3	44.5	94	26
September 16	75.1	44.4	95	28
September 17	74.8	44.2	95	25
September 18	74.5	43.9	98	30
September 19	74.0	43.6	92	24
September 20	73.5	43.3	92	30
September 21	73.0	43.0	93	27
September 22	72.6	42.7	94	27
September 23	72.2	42.6	89	22
September 24	71.7	42.4	93	26
September 25	71.4	42.1	96	29
September 26	70.9	41.9	90	30
September 27	70.3	41.6	94	28
September 28	69.6	41.3	93	24
September 29	69.0	41.0	85	20
September 30	68.5	40.8	88	21

Weather Station Details

Years	Station	Coordinates
1940–2024	Pullman 2 Nw	location