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Monthly climate in Westerville, Ohio, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Westerville features a humid continental climate (Dfa).Temperatures typically range between -1 °C (30 °F) and 24 °C (76 °F) through the year, but rarely can drop to -24 °C (-10 °F) or can rise to as high as 34 °C (94 °F).The average annual precipitation amounts to about 1233 mm (48.5 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually.Westerville enjoys an average of 2862 hours of sunshine throughout the year, and daylight varies from 9 hours 21 minutes to 14 hours 57 minutes per day.

Monthly average temperatures in Westerville, Ohio, United States §

The warmest months in Westerville are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 2 °C (30 - 36 °F) throughout the day. On average each year, Westerville experiences 95 days above 25 °C (77.0 °F) and 93 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Westerville, 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 21°C
(70°F)		 24°C
(75°F)		 24°C
(75°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(93°F)		 33°C
(92°F)		 33°C
(91°F)		 34°C
(94°F)		 33°C
(92°F)		 25°C
(77°F)		 18°C
(65°F)
Mean maximum 16°C
(60°F)		 18°C
(65°F)		 21°C
(71°F)		 26°C
(80°F)		 31°C
(87°F)		 32°C
(90°F)		 32°C
(90°F)		 32°C
(89°F)		 32°C
(90°F)		 29°C
(84°F)		 20°C
(68°F)		 17°C
(62°F)
Average high 3°C
(37°F)		 5°C
(41°F)		 10°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 27°C
(80°F)		 29°C
(84°F)		 27°C
(82°F)		 26°C
(78°F)		 19°C
(67°F)		 10°C
(50°F)		 6°C
(43°F)
Daily mean -1°C
(30°F)		 1°C
(34°F)		 5°C
(42°F)		 11°C
(52°F)		 17°C
(63°F)		 22°C
(72°F)		 24°C
(76°F)		 23°C
(73°F)		 20°C
(69°F)		 14°C
(58°F)		 5°C
(42°F)		 2°C
(36°F)
Average low -4°C
(24°F)		 -3°C
(26°F)		 1°C
(33°F)		 6°C
(42°F)		 12°C
(55°F)		 17°C
(63°F)		 20°C
(67°F)		 18°C
(65°F)		 15°C
(60°F)		 9°C
(49°F)		 1°C
(34°F)		 -2°C
(29°F)
Mean minimum -17°C
(2°F)		 -15°C
(6°F)		 -9°C
(16°F)		 -4°C
(25°F)		 2°C
(37°F)		 11°C
(52°F)		 14°C
(58°F)		 12°C
(55°F)		 8°C
(47°F)		 1°C
(34°F)		 -8°C
(19°F)		 -11°C
(12°F)
Minimum -24°C
(-10°F)		 -21°C
(-5°F)		 -14°C
(7°F)		 -6°C
(22°F)		 -2°C
(29°F)		 7°C
(46°F)		 13°C
(56°F)		 10°C
(51°F)		 5°C
(41°F)		 -2°C
(29°F)		 -15°C
(5°F)		 -17°C
(2°F)

Compare climate in Westerville with other places

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

Monthly average precipitation in Westerville, Ohio, United States §

Westerville usually has the most precipitation in April, May and June, with an average of 14 rainy days and 128 mm (5.1 inches) of precipitation per month.The driest months in Westerville are January, August and September. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Westerville, 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) 78 (3.1) 104 (4.1) 105 (4.1) 116 (4.6) 124 (4.9) 144 (5.7) 111 (4.4) 74 (2.9) 86 (3.4) 99 (3.9) 96 (3.8) 97 (3.8)
Average precipitation days (≥ 1 mm) 10 13 12 13 15 14 13 12 8 13 9 12

Monthly sunshine hours in Westerville, Ohio, United States §

The sunniest months in Westerville are June, July and August, when the sun shines an average of 10 hours 51 minutes a day.Least sunny months in Westerville: January, February and December receive an average of 4 hours 36 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Westerville, 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 114 155 227 236 281 319 354 325 283 231 181 150
Mean daily daylight hours 9h 40m 10h 41m 11h 58m 13h 17m 14h 24m 14h 57m 14h 39m 13h 40m 12h 24m 11h 5m 9h 56m 9h 21m

Solar UV radiation in Westerville, Ohio, United States §

Westerville 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, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Westerville UV Index data.

Average daily maximum UV levels by month for Westerville, 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 6 9 10 10 10 9 8 6 4 3