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Monthly climate in Jamestown, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Jamestown features a humid continental climate (Dfb).Temperatures typically range between -2 °C (28 °F) and 23 °C (73 °F) through the year, but rarely can drop to -23 °C (-9 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1387 mm (54.6 inches) and receives 169 rainy days on the 1 mm (0.04 inches) threshold annually.Jamestown enjoys an average of 2795 hours of sunshine throughout the year, and daylight varies from 9 hours 12 minutes to 15 hours 6 minutes per day.

Monthly average temperatures in Jamestown, Pennsylvania, United States §

The warmest months in Jamestown 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 (28 - 34 °F) throughout the day. On average each year, Jamestown experiences 72 days above 25 °C (77.0 °F) and 100 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jamestown, 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)		 23°C
(74°F)		 24°C
(75°F)		 28°C
(83°F)		 32°C
(89°F)		 32°C
(91°F)		 34°C
(93°F)		 33°C
(91°F)		 33°C
(91°F)		 30°C
(87°F)		 25°C
(77°F)		 17°C
(63°F)
Mean maximum 14°C
(57°F)		 17°C
(63°F)		 21°C
(71°F)		 26°C
(78°F)		 31°C
(87°F)		 31°C
(89°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)		 4°C
(39°F)		 8°C
(47°F)		 14°C
(57°F)		 20°C
(69°F)		 25°C
(77°F)		 27°C
(81°F)		 26°C
(80°F)		 24°C
(75°F)		 17°C
(64°F)		 8°C
(47°F)		 4°C
(40°F)
Daily mean -2°C
(28°F)		 -1°C
(31°F)		 3°C
(38°F)		 9°C
(48°F)		 15°C
(60°F)		 20°C
(68°F)		 23°C
(73°F)		 21°C
(71°F)		 19°C
(66°F)		 13°C
(55°F)		 4°C
(40°F)		 1°C
(34°F)
Average low -6°C
(22°F)		 -5°C
(24°F)		 -1°C
(30°F)		 4°C
(40°F)		 10°C
(51°F)		 15°C
(60°F)		 18°C
(65°F)		 17°C
(63°F)		 14°C
(58°F)		 9°C
(48°F)		 1°C
(34°F)		 -2°C
(28°F)
Mean minimum -18°C
(0°F)		 -18°C
(0°F)		 -12°C
(10°F)		 -3°C
(26°F)		 2°C
(35°F)		 9°C
(49°F)		 13°C
(56°F)		 11°C
(52°F)		 7°C
(45°F)		 1°C
(35°F)		 -6°C
(21°F)		 -12°C
(11°F)
Minimum -23°C
(-9°F)		 -22°C
(-8°F)		 -15°C
(4°F)		 -5°C
(23°F)		 -2°C
(29°F)		 5°C
(42°F)		 12°C
(54°F)		 9°C
(49°F)		 3°C
(39°F)		 0°C
(32°F)		 -11°C
(12°F)		 -17°C
(1°F)

Compare climate in Jamestown with other places

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

Monthly average precipitation in Jamestown, Pennsylvania, United States §

Jamestown usually has the most precipitation in May, June and July, with an average of 15 rainy days and 139 mm (5.5 inches) of precipitation per month.The driest months in Jamestown are January, February and September. On average, 99 mm (3.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jamestown, 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) 96 (3.8) 102 (4.0) 111 (4.4) 130 (5.1) 140 (5.5) 138 (5.4) 138 (5.4) 102 (4.0) 100 (3.9) 124 (4.9) 105 (4.1) 102 (4.0)
Average precipitation days (≥ 1 mm) 14 16 14 16 16 14 15 13 10 15 13 13

Monthly sunshine hours in Jamestown, Pennsylvania, United States §

The sunniest months in Jamestown are June, July and August, when the sun shines an average of 10 hours 56 minutes a day.Least sunny months in Jamestown: January, February and December receive an average of 3 hours 55 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jamestown, 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 95 140 228 251 283 333 340 331 290 220 158 120
Mean daily daylight hours 9h 33m 10h 37m 11h 58m 13h 21m 14h 31m 15h 6m 14h 47m 13h 44m 12h 25m 11h 2m 9h 50m 9h 12m

Solar UV radiation in Jamestown, Pennsylvania, United States §

Jamestown 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, 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 Jamestown UV Index data.

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