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Ephrata May Weather

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

Typical Ephrata May Weather 1991–2020
Average daily high	73.6 °F
Average daily low	47.8 °F
Average monthly precipitation	0.8 inches
Daily chance of precipitation	20.7%

Ephrata May Weather Records 1903–2024
Highest temperature	101 °F	May 31, 1986
Lowest temperature	28 °F	May 8, 2022
Highest daily low	76 °F	May 31, 1910
Lowest daily high	46 °F	May 11, 1967
Hottest average high temperature	83.1 °F	1910
Coldest average high temperature	66.2 °F	1984
Most daily precipitation	1.8 inches	May 20, 1912
Most monthly precipitation	3.6 inches	1948

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
May 1	69.2	43.1	90	28
May 2	69.5	43.5	88	30
May 3	69.8	43.8	89	31
May 4	70.1	44.2	90	29
May 5	70.4	44.5	96	30
May 6	70.5	44.7	92	30
May 7	70.7	45.0	96	30
May 8	71.0	45.3	96	28
May 9	71.3	45.6	94	31
May 10	71.7	45.9	96	32
May 11	72.0	46.3	95	31
May 12	72.3	46.6	96	34
May 13	72.6	46.9	96	30
May 14	72.9	47.2	96	32
May 15	73.3	47.5	96	35
May 16	73.6	47.8	96	29
May 17	74.0	48.2	96	31
May 18	74.3	48.6	96	32
May 19	74.6	49.0	93	34
May 20	75.0	49.3	93	36
May 21	75.2	49.6	96	32
May 22	75.4	49.9	96	31
May 23	75.6	50.1	98	32
May 24	75.9	50.4	95	33
May 25	76.0	50.6	98	34
May 26	76.1	50.7	101	38
May 27	76.2	50.9	97	35
May 28	76.4	51.1	101	35
May 29	76.5	51.3	97	36
May 30	76.7	51.5	100	38
May 31	76.8	51.6	101	35

Weather Station Details

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