nomadseason

Monthly climate in South Williamsport, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification South Williamsport 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 -25 °C (-13 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1326 mm (52.2 inches) and receives 142 rainy days on the 1 mm (0.04 inches) threshold annually.South Williamsport enjoys an average of 2723 hours of sunshine throughout the year, and daylight varies from 9 hours 14 minutes to 15 hours 5 minutes per day.

Monthly average temperatures in South Williamsport, Pennsylvania, United States §

The warmest months in South Williamsport are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (68 - 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 - 34 °F) throughout the day. On average each year, South Williamsport experiences 72 days above 25 °C (77.0 °F) and 103 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in South Williamsport, 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 17°C
(63°F)		 22°C
(71°F)		 22°C
(71°F)		 26°C
(80°F)		 32°C
(89°F)		 35°C
(95°F)		 35°C
(95°F)		 34°C
(94°F)		 32°C
(90°F)		 29°C
(85°F)		 22°C
(73°F)		 16°C
(61°F)
Mean maximum 12°C
(54°F)		 16°C
(60°F)		 19°C
(66°F)		 24°C
(76°F)		 30°C
(87°F)		 32°C
(89°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(87°F)		 27°C
(80°F)		 19°C
(67°F)		 13°C
(55°F)
Average high 2°C
(35°F)		 4°C
(39°F)		 8°C
(47°F)		 14°C
(58°F)		 21°C
(69°F)		 25°C
(78°F)		 28°C
(83°F)		 27°C
(82°F)		 24°C
(75°F)		 17°C
(64°F)		 9°C
(48°F)		 4°C
(40°F)
Daily mean -2°C
(29°F)		 -1°C
(31°F)		 3°C
(38°F)		 9°C
(49°F)		 15°C
(60°F)		 20°C
(68°F)		 23°C
(74°F)		 22°C
(72°F)		 18°C
(65°F)		 13°C
(55°F)		 5°C
(40°F)		 1°C
(34°F)
Average low -6°C
(22°F)		 -5°C
(24°F)		 -1°C
(30°F)		 5°C
(40°F)		 10°C
(51°F)		 15°C
(59°F)		 18°C
(65°F)		 18°C
(64°F)		 14°C
(57°F)		 8°C
(47°F)		 0°C
(33°F)		 -2°C
(28°F)
Mean minimum -18°C
(0°F)		 -17°C
(2°F)		 -10°C
(14°F)		 -3°C
(27°F)		 2°C
(36°F)		 9°C
(48°F)		 13°C
(55°F)		 11°C
(52°F)		 6°C
(44°F)		 0°C
(33°F)		 -8°C
(17°F)		 -12°C
(11°F)
Minimum -25°C
(-12°F)		 -25°C
(-13°F)		 -18°C
(-0°F)		 -4°C
(25°F)		 -2°C
(29°F)		 6°C
(43°F)		 11°C
(52°F)		 11°C
(52°F)		 2°C
(35°F)		 -1°C
(30°F)		 -17°C
(2°F)		 -16°C
(3°F)

Compare climate in South Williamsport with other places

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

Monthly average precipitation in South Williamsport, Pennsylvania, United States §

South Williamsport usually has the most precipitation in May, July and October, with an average of 13 rainy days and 140 mm (5.5 inches) of precipitation per month.The driest months in South Williamsport are January, March and December. On average, 86 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Williamsport, 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) 74 (2.9) 99 (3.9) 89 (3.5) 115 (4.5) 137 (5.4) 105 (4.1) 146 (5.8) 113 (4.4) 121 (4.8) 135 (5.3) 97 (3.8) 94 (3.7)
Average precipitation days (≥ 1 mm) 9 12 12 13 15 13 14 12 10 12 9 11

Monthly sunshine hours in South Williamsport, Pennsylvania, United States §

The sunniest months in South Williamsport are June, July and August, when the sun shines an average of 10 hours 16 minutes a day.Least sunny months in South Williamsport: January, February and December receive an average of 4 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in South Williamsport, 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 118 152 221 228 257 309 327 307 269 211 178 142
Mean daily daylight hours 9h 34m 10h 37m 11h 58m 13h 20m 14h 30m 15h 5m 14h 46m 13h 44m 12h 24m 11h 2m 9h 50m 9h 14m

Solar UV radiation in South Williamsport, Pennsylvania, United States §

South Williamsport 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 South Williamsport UV Index data.

Average daily maximum UV levels by month for South Williamsport, 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