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Monthly climate in Ottawa, Ohio, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ottawa features a humid continental climate (Dfa).Temperatures typically range between -2 °C (29 °F) and 24 °C (76 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 35 °C (94 °F).The average annual precipitation amounts to about 1111 mm (43.8 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually.Ottawa enjoys an average of 2841 hours of sunshine throughout the year, and daylight varies from 9 hours 15 minutes to 15 hours 4 minutes per day.

Monthly average temperatures in Ottawa, Ohio, United States §

The warmest months in Ottawa 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 -2 to 2 °C (29 - 35 °F) throughout the day. On average each year, Ottawa experiences 94 days above 25 °C (77.0 °F) and 96 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ottawa, 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 18°C
(64°F)		 23°C
(73°F)		 25°C
(77°F)		 29°C
(85°F)		 34°C
(94°F)		 35°C
(94°F)		 35°C
(94°F)		 34°C
(93°F)		 33°C
(93°F)		 33°C
(92°F)		 26°C
(79°F)		 17°C
(63°F)
Mean maximum 14°C
(58°F)		 17°C
(63°F)		 21°C
(70°F)		 27°C
(80°F)		 31°C
(89°F)		 33°C
(92°F)		 33°C
(93°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(85°F)		 19°C
(67°F)		 16°C
(61°F)
Average high 2°C
(36°F)		 4°C
(39°F)		 10°C
(50°F)		 16°C
(60°F)		 22°C
(72°F)		 27°C
(81°F)		 29°C
(84°F)		 28°C
(82°F)		 26°C
(78°F)		 19°C
(66°F)		 9°C
(49°F)		 6°C
(42°F)
Daily mean -2°C
(29°F)		 -0°C
(32°F)		 5°C
(41°F)		 10°C
(50°F)		 17°C
(63°F)		 22°C
(72°F)		 24°C
(76°F)		 23°C
(73°F)		 20°C
(68°F)		 14°C
(57°F)		 5°C
(42°F)		 2°C
(35°F)
Average low -5°C
(23°F)		 -5°C
(24°F)		 -0°C
(32°F)		 5°C
(41°F)		 12°C
(54°F)		 17°C
(63°F)		 20°C
(68°F)		 18°C
(65°F)		 15°C
(59°F)		 9°C
(48°F)		 1°C
(34°F)		 -2°C
(28°F)
Mean minimum -18°C
(0°F)		 -16°C
(3°F)		 -9°C
(15°F)		 -5°C
(23°F)		 2°C
(36°F)		 11°C
(52°F)		 14°C
(58°F)		 12°C
(54°F)		 8°C
(46°F)		 0°C
(33°F)		 -9°C
(17°F)		 -12°C
(10°F)
Minimum -25°C
(-13°F)		 -22°C
(-8°F)		 -13°C
(9°F)		 -8°C
(18°F)		 -1°C
(30°F)		 7°C
(45°F)		 13°C
(56°F)		 9°C
(48°F)		 4°C
(40°F)		 -2°C
(28°F)		 -17°C
(2°F)		 -23°C
(-9°F)

Compare climate in Ottawa with other places

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

Monthly average precipitation in Ottawa, Ohio, United States §

Ottawa usually has the most precipitation in May, June and July, with an average of 13 rainy days and 122 mm (4.8 inches) of precipitation per month.The driest months in Ottawa are January, September and December. On average, 68 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ottawa, 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) 73 (2.9) 83 (3.3) 95 (3.8) 99 (3.9) 134 (5.3) 122 (4.8) 110 (4.3) 88 (3.4) 70 (2.8) 91 (3.6) 85 (3.3) 62 (2.5)
Average precipitation days (≥ 1 mm) 8 12 12 14 15 13 13 11 9 13 9 11

Monthly sunshine hours in Ottawa, Ohio, United States §

The sunniest months in Ottawa are June, July and August, when the sun shines an average of 10 hours 53 minutes a day.Least sunny months in Ottawa: January, February and December receive an average of 4 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ottawa, 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 110 163 228 229 275 321 356 324 282 224 174 150
Mean daily daylight hours 9h 35m 10h 38m 11h 58m 13h 20m 14h 29m 15h 4m 14h 45m 13h 43m 12h 24m 11h 3m 9h 51m 9h 15m

Solar UV radiation in Ottawa, Ohio, United States §

Ottawa 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 Low / 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 Ottawa UV Index data.

Average daily maximum UV levels by month for Ottawa, 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 2