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Monthly climate in Slippery Rock, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Slippery Rock features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 23 °C (74 °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 1459 mm (57.4 inches) and receives 168 rainy days on the 1 mm (0.04 inches) threshold annually.Slippery Rock enjoys an average of 2684 hours of sunshine throughout the year, and daylight varies from 9 hours 16 minutes to 15 hours 3 minutes per day.

Monthly average temperatures in Slippery Rock, Pennsylvania, United States §

The warmest months in Slippery Rock are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °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, Slippery Rock experiences 75 days above 25 °C (77.0 °F) and 97 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Slippery Rock, Pennsylvania, 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 20°C
(68°F)		 23°C
(74°F)		 24°C
(75°F)		 28°C
(82°F)		 31°C
(88°F)		 33°C
(92°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(87°F)		 25°C
(76°F)		 17°C
(62°F)
Mean maximum 15°C
(59°F)		 18°C
(65°F)		 21°C
(71°F)		 26°C
(79°F)		 30°C
(86°F)		 31°C
(88°F)		 32°C
(90°F)		 31°C
(89°F)		 30°C
(87°F)		 27°C
(82°F)		 19°C
(67°F)		 15°C
(59°F)
Average high 2°C
(36°F)		 5°C
(41°F)		 9°C
(49°F)		 15°C
(59°F)		 21°C
(70°F)		 25°C
(77°F)		 28°C
(82°F)		 27°C
(80°F)		 24°C
(75°F)		 18°C
(64°F)		 9°C
(48°F)		 5°C
(41°F)
Daily mean -2°C
(29°F)		 0°C
(33°F)		 4°C
(39°F)		 10°C
(49°F)		 16°C
(61°F)		 20°C
(69°F)		 23°C
(74°F)		 22°C
(71°F)		 19°C
(66°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(35°F)
Average low -6°C
(22°F)		 -4°C
(25°F)		 -1°C
(31°F)		 5°C
(41°F)		 11°C
(52°F)		 15°C
(60°F)		 18°C
(65°F)		 17°C
(63°F)		 14°C
(58°F)		 9°C
(48°F)		 1°C
(33°F)		 -2°C
(28°F)
Mean minimum -19°C
(-1°F)		 -16°C
(3°F)		 -12°C
(11°F)		 -3°C
(27°F)		 1°C
(35°F)		 9°C
(48°F)		 13°C
(56°F)		 11°C
(52°F)		 7°C
(45°F)		 1°C
(34°F)		 -7°C
(19°F)		 -11°C
(13°F)
Minimum -24°C
(-10°F)		 -23°C
(-9°F)		 -16°C
(4°F)		 -5°C
(24°F)		 -2°C
(29°F)		 5°C
(41°F)		 12°C
(54°F)		 9°C
(48°F)		 3°C
(38°F)		 -1°C
(31°F)		 -14°C
(8°F)		 -15°C
(5°F)

Compare climate in Slippery Rock with other places

Compare temperature, precipitation, sunshine, UV index in Slippery Rock, Pennsylvania, United States with other places around the world.

Monthly average precipitation in Slippery Rock, Pennsylvania, United States §

Slippery Rock usually has the most precipitation in April, May and July, with an average of 16 rainy days and 146 mm (5.7 inches) of precipitation per month.The driest months in Slippery Rock are January, August and November. On average, 102 mm (4.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Slippery Rock, Pennsylvania, 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) 102 (4.0) 117 (4.6) 106 (4.2) 141 (5.6) 150 (5.9) 139 (5.5) 145 (5.7) 101 (4.0) 119 (4.7) 129 (5.1) 104 (4.1) 104 (4.1)
Average precipitation days (≥ 1 mm) 13 15 14 16 17 16 16 14 10 13 12 12

Monthly sunshine hours in Slippery Rock, Pennsylvania, United States §

The sunniest months in Slippery Rock are June, July and August, when the sun shines an average of 10 hours 26 minutes a day.Least sunny months in Slippery Rock: January, February and December receive an average of 3 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Slippery Rock, Pennsylvania, 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 96 135 217 238 265 312 330 318 279 213 155 122
Mean daily daylight hours 9h 36m 10h 38m 11h 58m 13h 19m 14h 28m 15h 3m 14h 44m 13h 42m 12h 24m 11h 3m 9h 52m 9h 16m

Solar UV radiation in Slippery Rock, Pennsylvania, United States §

Slippery Rock 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 Slippery Rock UV Index data.

Average daily maximum UV levels by month for Slippery Rock, Pennsylvania, 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