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Monthly climate in Johnstown, Ohio, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Johnstown features a humid continental climate (Dfa).Temperatures typically range between -1 °C (30 °F) and 24 °C (75 °F) through the year, but rarely can drop to -23 °C (-10 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1293 mm (50.9 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually.Johnstown enjoys an average of 2835 hours of sunshine throughout the year, and daylight varies from 9 hours 20 minutes to 14 hours 59 minutes per day.

Monthly average temperatures in Johnstown, Ohio, United States §

The warmest months in Johnstown are June, July and August, with daily mean temperatures ranging from 22 to 24 °C (71 - 75 °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, Johnstown experiences 92 days above 25 °C (77.0 °F) and 94 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Johnstown, 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
(69°F)		 23°C
(75°F)		 23°C
(74°F)		 28°C
(83°F)		 32°C
(90°F)		 33°C
(92°F)		 33°C
(91°F)		 32°C
(90°F)		 34°C
(93°F)		 33°C
(91°F)		 25°C
(77°F)		 18°C
(65°F)
Mean maximum 15°C
(60°F)		 18°C
(65°F)		 21°C
(71°F)		 26°C
(79°F)		 30°C
(87°F)		 32°C
(90°F)		 32°C
(90°F)		 31°C
(89°F)		 32°C
(89°F)		 28°C
(83°F)		 20°C
(68°F)		 16°C
(62°F)
Average high 3°C
(37°F)		 5°C
(42°F)		 10°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 26°C
(80°F)		 29°C
(84°F)		 27°C
(81°F)		 25°C
(78°F)		 19°C
(66°F)		 9°C
(49°F)		 6°C
(43°F)
Daily mean -1°C
(30°F)		 1°C
(34°F)		 5°C
(42°F)		 11°C
(51°F)		 17°C
(63°F)		 22°C
(71°F)		 24°C
(75°F)		 23°C
(73°F)		 20°C
(68°F)		 14°C
(57°F)		 5°C
(41°F)		 2°C
(36°F)
Average low -5°C
(24°F)		 -3°C
(26°F)		 1°C
(33°F)		 6°C
(42°F)		 12°C
(55°F)		 17°C
(63°F)		 19°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
(5°F)		 -9°C
(16°F)		 -4°C
(26°F)		 3°C
(37°F)		 11°C
(52°F)		 14°C
(58°F)		 13°C
(55°F)		 8°C
(46°F)		 1°C
(34°F)		 -7°C
(19°F)		 -11°C
(12°F)
Minimum -23°C
(-10°F)		 -22°C
(-8°F)		 -14°C
(7°F)		 -6°C
(22°F)		 -2°C
(29°F)		 7°C
(45°F)		 13°C
(55°F)		 11°C
(51°F)		 5°C
(41°F)		 -2°C
(29°F)		 -15°C
(5°F)		 -17°C
(2°F)

Compare climate in Johnstown with other places

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

Monthly average precipitation in Johnstown, Ohio, United States §

Johnstown usually has the most precipitation in April, May and June, with an average of 14 rainy days and 135 mm (5.3 inches) of precipitation per month.The driest months in Johnstown are January, August and September. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Johnstown, 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) 86 (3.4) 110 (4.3) 111 (4.4) 125 (4.9) 129 (5.1) 151 (5.9) 114 (4.5) 76 (3.0) 88 (3.4) 102 (4.0) 100 (3.9) 104 (4.1)
Average precipitation days (≥ 1 mm) 10 13 13 13 15 14 12 12 8 13 10 12

Monthly sunshine hours in Johnstown, Ohio, United States §

The sunniest months in Johnstown are June, July and August, when the sun shines an average of 10 hours 47 minutes a day.Least sunny months in Johnstown: January, February and December receive an average of 4 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Johnstown, 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 112 151 225 238 277 317 351 323 282 228 179 146
Mean daily daylight hours 9h 39m 10h 40m 11h 58m 13h 18m 14h 25m 14h 59m 14h 40m 13h 40m 12h 24m 11h 4m 9h 55m 9h 20m

Solar UV radiation in Johnstown, Ohio, United States §

Johnstown 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 Johnstown UV Index data.

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