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Ephrata December Weather

Averages and records for weather in Ephrata, Washington in the month of December.

Typical Ephrata December Weather 1991–2020
Average daily high	35.8 °F
Average daily low	24.0 °F
Average monthly precipitation	1.2 inches
Daily chance of precipitation	33.0%

Ephrata December Weather Records 1903–2024
Highest temperature	69 °F	December 1, 2021
Lowest temperature	-21 °F	December 23, 1983
Highest daily low	50 °F	December 3, 1943
Lowest daily high	-8 °F	December 29, 1968
Hottest average high temperature	44.0 °F	1939
Coldest average high temperature	23.3 °F	1984
Most daily precipitation	0.8 inches	December 9, 1909
Most monthly precipitation	3.8 inches	1931

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
December 1	39.2	25.7	69	1
December 2	38.8	25.5	64	2
December 3	38.4	25.3	59	3
December 4	38.1	25.0	60	2
December 5	37.7	24.9	54	5
December 6	37.4	24.8	62	3
December 7	37.3	24.7	55	-1
December 8	37.2	24.6	54	-2
December 9	37.0	24.5	54	0
December 10	36.8	24.4	62	-5
December 11	36.6	24.3	59	-3
December 12	36.4	24.2	64	-5
December 13	36.2	24.2	63	-4
December 14	36.1	24.1	58	-5
December 15	35.9	24.1	59	-12
December 16	35.8	23.9	59	-10
December 17	35.6	23.8	55	-11
December 18	35.4	23.8	58	-3
December 19	35.3	23.6	53	-7
December 20	35.2	23.5	56	-2
December 21	35.2	23.5	62	-9
December 22	35.1	23.4	57	-11
December 23	35.1	23.4	52	-21
December 24	35.1	23.4	53	-3
December 25	35.2	23.5	53	-3
December 26	35.2	23.5	60	-2
December 27	35.2	23.5	56	-2
December 28	35.2	23.4	55	-10
December 29	35.2	23.3	55	-14
December 30	35.1	23.3	54	-16
December 31	35.1	23.3	52	-9

Weather Station Details

Years	Station	Coordinates
1949–2024	Ephrata Municipal Airport	location
1903–1948	Ephrata	location