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Portage May Weather

Averages and records for weather in Portage, Wisconsin in the month of May.

Typical Portage May Weather 1991–2020
Average daily high	68.6 °F
Average daily low	47.9 °F
Average monthly precipitation	4.6 inches
Average monthly snow	none
Daily chance of precipitation	42.2%
Daily chance of snow	0%

Portage May Weather Records 1889–2024
Highest temperature	102 °F	May 31, 1934
Lowest temperature	20 °F	May 10, 1966
Highest daily low	72 °F	May 31, 2022
Lowest daily high	36 °F	May 1, 1909
Hottest average high temperature	81.4 °F	1934
Coldest average high temperature	62.1 °F	1996
Most daily precipitation	3.7 inches	May 18, 2000
Most monthly precipitation	10.1 inches	2004
Most daily snow	4.0 inches	May 10, 1902
Most monthly snow	4.0 inches	1902

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	62.6	42.3	95	21
May 2	63.0	42.7	89	22
May 3	63.5	43.0	88	23
May 4	63.8	43.2	93	23
May 5	64.1	43.5	91	24
May 6	64.5	43.8	94	23
May 7	64.9	44.2	89	25
May 8	65.3	44.6	88	23
May 9	65.8	45.1	95	23
May 10	66.1	45.4	89	20
May 11	66.4	45.8	90	26
May 12	66.7	46.2	87	24
May 13	67.2	46.7	94	28
May 14	67.7	47.1	92	30
May 15	68.1	47.5	88	28
May 16	68.6	47.9	88	26
May 17	69.1	48.2	88	28
May 18	69.5	48.6	88	30
May 19	69.9	48.9	93	29
May 20	70.1	49.1	93	29
May 21	70.4	49.5	91	29
May 22	70.6	49.7	92	27
May 23	70.9	49.9	92	30
May 24	71.2	50.2	92	33
May 25	71.5	50.6	93	31
May 26	71.8	50.9	91	29
May 27	72.2	51.3	91	28
May 28	72.7	51.8	94	31
May 29	73.1	52.2	95	26
May 30	73.5	52.5	93	31
May 31	73.9	52.8	102	30

Weather Station Details

Years	Station	Coordinates
1889–2024	Portage WWTP	location