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Monthly climate in West Portsmouth, Ohio, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification West Portsmouth features a humid subtropical climate (Cfa).Temperatures typically range between 2 °C (35 °F) and 25 °C (78 °F) through the year, but rarely can drop to -19 °C (-2 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1368 mm (53.9 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually.West Portsmouth enjoys an average of 2864 hours of sunshine throughout the year, and daylight varies from 9 hours 29 minutes to 14 hours 49 minutes per day.

Monthly average temperatures in West Portsmouth, Ohio, United States §

The warmest months in West Portsmouth are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (73 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 4 °C (35 - 40 °F) throughout the day. On average each year, West Portsmouth experiences 114 days above 25 °C (77.0 °F) and 67 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in West Portsmouth, Ohio, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 22°C
(71°F)		 27°C
(80°F)		 28°C
(83°F)		 30°C
(87°F)		 32°C
(90°F)		 34°C
(94°F)		 36°C
(97°F)		 35°C
(95°F)		 37°C
(99°F)		 35°C
(95°F)		 27°C
(81°F)		 20°C
(69°F)
Mean maximum 18°C
(64°F)		 22°C
(71°F)		 25°C
(78°F)		 29°C
(84°F)		 31°C
(88°F)		 33°C
(92°F)		 35°C
(95°F)		 33°C
(92°F)		 33°C
(92°F)		 30°C
(86°F)		 23°C
(74°F)		 19°C
(66°F)
Average high 6°C
(42°F)		 9°C
(48°F)		 13°C
(56°F)		 18°C
(65°F)		 24°C
(75°F)		 28°C
(82°F)		 30°C
(87°F)		 29°C
(85°F)		 27°C
(81°F)		 21°C
(70°F)		 12°C
(54°F)		 9°C
(48°F)
Daily mean 2°C
(35°F)		 4°C
(39°F)		 8°C
(47°F)		 13°C
(55°F)		 19°C
(66°F)		 23°C
(73°F)		 25°C
(78°F)		 24°C
(75°F)		 21°C
(71°F)		 15°C
(60°F)		 7°C
(45°F)		 4°C
(40°F)
Average low -2°C
(29°F)		 -0°C
(32°F)		 3°C
(38°F)		 8°C
(46°F)		 14°C
(58°F)		 18°C
(65°F)		 21°C
(70°F)		 20°C
(67°F)		 17°C
(62°F)		 11°C
(51°F)		 2°C
(37°F)		 0°C
(33°F)
Mean minimum -13°C
(8°F)		 -11°C
(12°F)		 -7°C
(20°F)		 -2°C
(29°F)		 5°C
(41°F)		 13°C
(55°F)		 16°C
(61°F)		 14°C
(58°F)		 9°C
(49°F)		 2°C
(36°F)		 -5°C
(23°F)		 -9°C
(17°F)
Minimum -19°C
(-2°F)		 -17°C
(2°F)		 -11°C
(12°F)		 -3°C
(26°F)		 1°C
(34°F)		 9°C
(49°F)		 14°C
(58°F)		 13°C
(56°F)		 7°C
(44°F)		 1°C
(33°F)		 -10°C
(14°F)		 -13°C
(9°F)

Compare climate in West Portsmouth with other places

Compare temperature, precipitation, sunshine, UV index in West Portsmouth, Ohio, United States with other places around the world.

Monthly average precipitation in West Portsmouth, Ohio, United States §

West Portsmouth usually has the most precipitation in April, May and June, with an average of 13 rainy days and 137 mm (5.4 inches) of precipitation per month.The driest months in West Portsmouth are January, March and November. On average, 89 mm (3.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in West Portsmouth, Ohio, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 85 (3.3) 124 (4.9) 106 (4.2) 128 (5.0) 128 (5.0) 157 (6.2) 107 (4.2) 120 (4.7) 109 (4.3) 116 (4.5) 77 (3.0) 112 (4.4)
Average precipitation days (≥ 1 mm) 9 14 13 13 14 14 14 14 8 12 8 11

Monthly sunshine hours in West Portsmouth, Ohio, United States §

The sunniest months in West Portsmouth are June, July and August, when the sun shines an average of 10 hours 30 minutes a day.Least sunny months in West Portsmouth: January, February and December receive an average of 4 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in West Portsmouth, Ohio, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 120 144 231 239 283 305 345 316 284 244 195 152
Mean daily daylight hours 9h 47m 10h 45m 11h 58m 13h 14m 14h 17m 14h 49m 14h 32m 13h 35m 12h 23m 11h 8m 10h 2m 9h 29m

Solar UV radiation in West Portsmouth, Ohio, United States §

West Portsmouth experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure.January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly West Portsmouth UV Index data.

Average daily maximum UV levels by month for West Portsmouth, Ohio, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 7 9 10 10 10 9 8 6 5 3