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Winthrop May Weather

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

Typical Winthrop May Weather 1991–2020
Average daily high	71.6 °F
Average daily low	40.3 °F
Average monthly precipitation	1.1 inches
Average monthly snow	none
Daily chance of precipitation	24.7%
Daily chance of snow	0%

Winthrop May Weather Records 1906–2024
Highest temperature	100 °F	May 31, 1986
Lowest temperature	20 °F	May 1, 1954
Highest daily low	63 °F	May 26, 1992
Lowest daily high	47 °F	May 13, 1943
Hottest average high temperature	79.5 °F	1958
Coldest average high temperature	64.5 °F	2022
Most daily precipitation	1.6 inches	May 13, 1911
Most monthly precipitation	4.3 inches	1948
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
May 1	67.6	36.1	84	20
May 2	67.9	36.4	87	23
May 3	68.3	36.8	87	24
May 4	68.5	37.1	87	22
May 5	68.7	37.4	91	22
May 6	68.9	37.6	92	22
May 7	69.1	37.8	91	24
May 8	69.3	38.1	91	22
May 9	69.6	38.4	91	24
May 10	69.9	38.6	91	23
May 11	70.2	39.0	93	22
May 12	70.4	39.2	96	21
May 13	70.7	39.5	96	27
May 14	71.0	39.7	91	27
May 15	71.3	40.0	91	24
May 16	71.6	40.3	90	24
May 17	71.9	40.7	95	25
May 18	72.2	41.0	94	27
May 19	72.4	41.3	94	28
May 20	72.7	41.5	89	29
May 21	72.9	41.8	90	29
May 22	73.1	42.1	92	25
May 23	73.2	42.4	91	28
May 24	73.4	42.6	92	31
May 25	73.6	42.9	94	26
May 26	73.7	43.0	94	25
May 27	73.7	43.3	94	29
May 28	73.7	43.4	95	28
May 29	73.8	43.6	96	28
May 30	73.9	43.8	99	28
May 31	73.9	43.9	100	27

Weather Station Details

Years	Station	Coordinates
1906–2024	Winthrop 1 WSW	location