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Monthly climate in Winterstown, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Winterstown features a humid subtropical climate (Cfa).Temperatures typically range between 1 °C (35 °F) and 26 °C (78 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1326 mm (52.2 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually.Winterstown enjoys an average of 3014 hours of sunshine throughout the year, and daylight varies from 9 hours 23 minutes to 14 hours 56 minutes per day.

Monthly average temperatures in Winterstown, Pennsylvania, United States §

The warmest months in Winterstown are June, July and August, with daily mean temperatures ranging from 23 to 26 °C (73 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (35 - 39 °F) throughout the day. On average each year, Winterstown experiences 98 days above 25 °C (77.0 °F) and 71 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Winterstown, 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 19°C
(67°F)		 26°C
(79°F)		 27°C
(80°F)		 30°C
(87°F)		 33°C
(92°F)		 35°C
(95°F)		 37°C
(99°F)		 35°C
(95°F)		 33°C
(92°F)		 34°C
(93°F)		 24°C
(75°F)		 18°C
(65°F)
Mean maximum 16°C
(61°F)		 20°C
(68°F)		 24°C
(75°F)		 28°C
(82°F)		 32°C
(90°F)		 33°C
(92°F)		 35°C
(96°F)		 34°C
(93°F)		 32°C
(89°F)		 29°C
(84°F)		 22°C
(73°F)		 16°C
(61°F)
Average high 5°C
(41°F)		 8°C
(46°F)		 11°C
(52°F)		 17°C
(63°F)		 22°C
(73°F)		 27°C
(82°F)		 30°C
(87°F)		 29°C
(84°F)		 25°C
(78°F)		 20°C
(68°F)		 12°C
(54°F)		 7°C
(45°F)
Daily mean 1°C
(35°F)		 3°C
(38°F)		 6°C
(44°F)		 12°C
(54°F)		 18°C
(64°F)		 23°C
(73°F)		 26°C
(78°F)		 24°C
(75°F)		 21°C
(70°F)		 15°C
(60°F)		 7°C
(45°F)		 3°C
(39°F)
Average low -2°C
(28°F)		 -1°C
(31°F)		 2°C
(36°F)		 7°C
(46°F)		 13°C
(56°F)		 18°C
(64°F)		 21°C
(70°F)		 20°C
(68°F)		 17°C
(62°F)		 11°C
(52°F)		 3°C
(37°F)		 -0°C
(32°F)
Mean minimum -11°C
(12°F)		 -10°C
(14°F)		 -7°C
(20°F)		 -0°C
(32°F)		 4°C
(40°F)		 11°C
(53°F)		 16°C
(62°F)		 15°C
(59°F)		 9°C
(49°F)		 3°C
(37°F)		 -5°C
(23°F)		 -8°C
(17°F)
Minimum -15°C
(5°F)		 -16°C
(3°F)		 -13°C
(9°F)		 -2°C
(28°F)		 1°C
(34°F)		 9°C
(48°F)		 14°C
(58°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(34°F)		 -6°C
(21°F)		 -12°C
(11°F)

Compare climate in Winterstown with other places

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

Monthly average precipitation in Winterstown, Pennsylvania, United States §

Winterstown usually has the most precipitation in May, July and August, with an average of 14 rainy days and 148 mm (5.8 inches) of precipitation per month.The driest months in Winterstown are January, November and December. On average, 82 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Winterstown, 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) 60 (2.4) 97 (3.8) 99 (3.9) 101 (4.0) 140 (5.5) 116 (4.6) 153 (6.0) 150 (5.9) 120 (4.7) 103 (4.1) 91 (3.6) 95 (3.8)
Average precipitation days (≥ 1 mm) 8 11 10 11 14 13 13 16 10 10 7 9

Monthly sunshine hours in Winterstown, Pennsylvania, United States §

The sunniest months in Winterstown are June, July and August, when the sun shines an average of 10 hours 50 minutes a day.Least sunny months in Winterstown: January, February and December receive an average of 5 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Winterstown, 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 142 177 250 252 278 326 353 317 273 237 220 184
Mean daily daylight hours 9h 41m 10h 42m 11h 58m 13h 17m 14h 23m 14h 56m 14h 38m 13h 39m 12h 23m 11h 5m 9h 57m 9h 23m

Solar UV radiation in Winterstown, Pennsylvania, United States §

Winterstown 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 Winterstown UV Index data.

Average daily maximum UV levels by month for Winterstown, 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 7 9 10 10 10 9 8 7 4 3