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Blaine September Weather

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

Typical Blaine September Weather 1991–2020
Average daily high	66.5 °F
Average daily low	50.0 °F
Average monthly precipitation	2.1 inches
Average monthly snow	none
Daily chance of precipitation	30.1%
Daily chance of snow	0%

Blaine September Weather Records 1893–2024
Highest temperature	87 °F	September 4, 2017
Lowest temperature	25 °F	September 25, 1908
Highest daily low	69 °F	September 5, 2017
Lowest daily high	47 °F	September 29, 1898
Hottest average high temperature	72.6 °F	1974
Coldest average high temperature	61.6 °F	1903
Most daily precipitation	2.2 inches	September 1, 1983
Most monthly precipitation	7.3 inches	1920
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	69.7	52.6	82	37
September 2	69.6	52.4	86	36
September 3	69.3	52.3	85	38
September 4	69.1	52.1	87	38
September 5	68.9	52.0	84	35
September 6	68.6	51.9	84	33
September 7	68.4	51.7	85	35
September 8	68.2	51.6	83	30
September 9	68.0	51.4	82	33
September 10	67.8	51.2	79	34
September 11	67.5	51.0	79	34
September 12	67.2	50.8	81	31
September 13	67.0	50.6	85	30
September 14	66.8	50.3	85	37
September 15	66.6	50.1	80	36
September 16	66.4	49.9	80	34
September 17	66.1	49.8	83	34
September 18	65.8	49.6	79	29
September 19	65.5	49.4	78	32
September 20	65.2	49.1	84	26
September 21	64.9	48.9	80	25
September 22	64.6	48.7	78	33
September 23	64.3	48.4	79	29
September 24	64.0	48.3	78	26
September 25	63.7	48.1	76	25
September 26	63.4	47.9	73	28
September 27	63.0	47.6	76	26
September 28	62.7	47.4	76	30
September 29	62.3	47.2	75	32
September 30	62.0	47.0	74	30

Weather Station Details

Years	Station	Coordinates
1893–2024	Blaine	location