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Ellensburg September Weather

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

Typical Ellensburg September Weather 1991–2020
Average daily high	76.3 °F
Average daily low	44.6 °F
Average monthly precipitation	0.3 inches
Average monthly snow	none
Daily chance of precipitation	10.0%
Daily chance of snow	0%

Ellensburg September Weather Records 1893–2024
Highest temperature	98 °F	September 6, 2020
Lowest temperature	16 °F	September 24, 1926
Highest daily low	68 °F	September 17, 1898
Lowest daily high	42 °F	September 24, 2014
Hottest average high temperature	82.6 °F	1967
Coldest average high temperature	64.7 °F	1895
Most daily precipitation	1.2 inches	September 23, 1984
Most monthly precipitation	2.8 inches	1911
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	80.6	48.3	97	29
September 2	80.2	48.0	95	25
September 3	79.8	47.7	97	25
September 4	79.4	47.5	96	22
September 5	79.0	47.2	96	24
September 6	78.7	46.9	98	20
September 7	78.3	46.6	95	31
September 8	78.0	46.3	91	28
September 9	77.7	46.0	94	22
September 10	77.5	45.7	94	25
September 11	77.3	45.5	94	26
September 12	77.0	45.2	94	21
September 13	76.7	44.9	95	20
September 14	76.4	44.5	94	20
September 15	76.3	44.1	92	21
September 16	76.1	43.9	92	23
September 17	75.8	43.6	94	30
September 18	75.4	43.3	90	30
September 19	75.0	43.0	92	29
September 20	74.6	42.7	89	28
September 21	74.2	42.3	93	24
September 22	73.8	41.9	87	24
September 23	73.4	41.7	88	19
September 24	73.0	41.4	91	16
September 25	72.5	41.2	89	20
September 26	72.0	40.9	88	24
September 27	71.3	40.6	87	25
September 28	70.7	40.3	88	23
September 29	70.1	40.0	89	21
September 30	69.6	39.7	86	23

Weather Station Details

Years	Station	Coordinates
1893–2024	Ellensburg	location