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Monthly climate in Jefferson, Ohio, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Jefferson features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 23 °C (73 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1322 mm (52.0 inches) and receives 171 rainy days on the 1 mm (0.04 inches) threshold annually.Jefferson enjoys an average of 2863 hours of sunshine throughout the year, and daylight varies from 9 hours 10 minutes to 15 hours 9 minutes per day.

Monthly average temperatures in Jefferson, Ohio, United States §

The warmest months in Jefferson are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (68 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (29 - 35 °F) throughout the day. On average each year, Jefferson experiences 63 days above 25 °C (77.0 °F) and 91 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jefferson, 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 19°C
(67°F)		 22°C
(73°F)		 23°C
(73°F)		 27°C
(81°F)		 30°C
(87°F)		 32°C
(90°F)		 34°C
(93°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(86°F)		 25°C
(77°F)		 17°C
(63°F)
Mean maximum 14°C
(57°F)		 17°C
(62°F)		 20°C
(69°F)		 25°C
(77°F)		 30°C
(86°F)		 31°C
(88°F)		 32°C
(90°F)		 31°C
(88°F)		 30°C
(87°F)		 28°C
(82°F)		 19°C
(67°F)		 15°C
(59°F)
Average high 2°C
(35°F)		 3°C
(38°F)		 7°C
(46°F)		 13°C
(55°F)		 19°C
(67°F)		 24°C
(76°F)		 27°C
(80°F)		 26°C
(79°F)		 23°C
(74°F)		 17°C
(63°F)		 8°C
(48°F)		 4°C
(40°F)
Daily mean -2°C
(29°F)		 -1°C
(31°F)		 3°C
(38°F)		 8°C
(47°F)		 15°C
(59°F)		 20°C
(68°F)		 23°C
(73°F)		 22°C
(71°F)		 19°C
(66°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(35°F)
Average low -5°C
(23°F)		 -4°C
(24°F)		 -1°C
(30°F)		 4°C
(40°F)		 10°C
(51°F)		 16°C
(61°F)		 19°C
(66°F)		 18°C
(65°F)		 15°C
(59°F)		 10°C
(50°F)		 2°C
(36°F)		 -1°C
(30°F)
Mean minimum -15°C
(5°F)		 -15°C
(5°F)		 -11°C
(13°F)		 -3°C
(28°F)		 2°C
(36°F)		 10°C
(51°F)		 14°C
(58°F)		 13°C
(55°F)		 8°C
(48°F)		 3°C
(38°F)		 -5°C
(23°F)		 -11°C
(12°F)
Minimum -20°C
(-4°F)		 -19°C
(-3°F)		 -14°C
(7°F)		 -5°C
(24°F)		 -1°C
(31°F)		 6°C
(44°F)		 13°C
(55°F)		 11°C
(53°F)		 6°C
(42°F)		 2°C
(36°F)		 -8°C
(17°F)		 -17°C
(2°F)

Compare climate in Jefferson with other places

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

Monthly average precipitation in Jefferson, Ohio, United States §

Jefferson usually has the most precipitation in May, July and October, with an average of 14 rainy days and 133 mm (5.3 inches) of precipitation per month.The driest months in Jefferson are January, February and September. On average, 92 mm (3.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jefferson, 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) 91 (3.6) 94 (3.7) 97 (3.8) 114 (4.5) 128 (5.0) 123 (4.8) 145 (5.7) 101 (4.0) 92 (3.6) 127 (5.0) 108 (4.2) 103 (4.1)
Average precipitation days (≥ 1 mm) 14 16 14 16 15 13 14 13 10 15 15 16

Monthly sunshine hours in Jefferson, Ohio, United States §

The sunniest months in Jefferson are June, July and August, when the sun shines an average of 11 hours 7 minutes a day.Least sunny months in Jefferson: January, February and December receive an average of 4 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jefferson, 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 99 145 234 258 293 339 347 336 294 224 164 124
Mean daily daylight hours 9h 30m 10h 35m 11h 58m 13h 22m 14h 33m 15h 9m 14h 50m 13h 46m 12h 25m 11h 1m 9h 47m 9h 10m

Solar UV radiation in Jefferson, Ohio, United States §

Jefferson experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, February 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 Jefferson UV Index data.

Average daily maximum UV levels by month for Jefferson, 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 4 6 8 9 10 10 9 8 6 4 2