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Portsmouth May Weather

Averages and records for weather in Portsmouth, Ohio in the month of May.

Typical Portsmouth May Weather 1991–2020
Average daily high	75.7 °F
Average daily low	52.5 °F
Average monthly precipitation	4.6 inches
Average monthly snow	none
Daily chance of precipitation	42.7%
Daily chance of snow	0%

Portsmouth May Weather Records 1893–2024
Highest temperature	99 °F	May 29, 1914
Lowest temperature	28 °F	May 4, 1986
Highest daily low	76 °F	May 14, 1956
Lowest daily high	40 °F	May 9, 1923
Hottest average high temperature	86.5 °F	1896
Coldest average high temperature	68.8 °F	1910
Most daily precipitation	3.1 inches	May 3, 2010
Most monthly precipitation	10.7 inches	2001
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	71.7	47.4	91	30
May 2	71.9	47.7	92	31
May 3	72.1	48.0	93	30
May 4	72.1	48.3	94	28
May 5	72.3	48.5	95	31
May 6	72.5	48.7	93	33
May 7	72.8	48.9	93	33
May 8	73.0	49.3	94	32
May 9	73.4	49.6	97	30
May 10	73.7	49.9	98	29
May 11	74.0	50.3	97	32
May 12	74.4	50.8	93	31
May 13	74.7	51.3	93	33
May 14	75.0	51.7	98	33
May 15	75.4	52.1	94	32
May 16	75.6	52.4	97	32
May 17	75.9	52.8	94	32
May 18	76.1	53.1	95	36
May 19	76.5	53.4	95	35
May 20	76.8	53.7	95	32
May 21	77.0	53.9	95	36
May 22	77.2	54.3	97	31
May 23	77.4	54.5	93	37
May 24	77.6	54.7	98	38
May 25	77.8	54.9	95	33
May 26	78.0	55.2	96	32
May 27	78.3	55.4	95	34
May 28	78.6	55.8	96	36
May 29	78.9	56.3	99	41
May 30	79.2	56.8	98	38
May 31	79.5	57.1	98	40

Weather Station Details

Years	Station	Coordinates
1893–2024	Portsmouth-Sciotoville	location