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Monthly climate in Fairfield, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fairfield features a humid subtropical climate (Cfa).Temperatures typically range between 1 °C (34 °F) and 25 °C (78 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1234 mm (48.6 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Fairfield enjoys an average of 2979 hours of sunshine throughout the year, and daylight varies from 9 hours 23 minutes to 14 hours 55 minutes per day.

Monthly average temperatures in Fairfield, Pennsylvania, United States §

The warmest months in Fairfield are June, July and August, with daily mean temperatures ranging from 22 to 25 °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 (34 - 38 °F) throughout the day. On average each year, Fairfield experiences 100 days above 25 °C (77.0 °F) and 76 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fairfield, 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)		 27°C
(80°F)		 25°C
(78°F)		 30°C
(86°F)		 32°C
(91°F)		 34°C
(94°F)		 36°C
(97°F)		 36°C
(97°F)		 34°C
(93°F)		 34°C
(93°F)		 24°C
(76°F)		 18°C
(64°F)
Mean maximum 16°C
(61°F)		 20°C
(69°F)		 24°C
(75°F)		 28°C
(82°F)		 32°C
(89°F)		 33°C
(92°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)
Average high 5°C
(41°F)		 8°C
(46°F)		 11°C
(53°F)		 17°C
(63°F)		 23°C
(73°F)		 27°C
(82°F)		 31°C
(87°F)		 29°C
(85°F)		 26°C
(79°F)		 20°C
(68°F)		 12°C
(53°F)		 7°C
(45°F)
Daily mean 1°C
(34°F)		 3°C
(38°F)		 6°C
(44°F)		 12°C
(54°F)		 18°C
(64°F)		 22°C
(73°F)		 25°C
(78°F)		 24°C
(76°F)		 21°C
(70°F)		 15°C
(60°F)		 7°C
(45°F)		 3°C
(38°F)
Average low -2°C
(28°F)		 -1°C
(30°F)		 1°C
(35°F)		 7°C
(45°F)		 13°C
(55°F)		 17°C
(63°F)		 21°C
(69°F)		 20°C
(68°F)		 16°C
(62°F)		 11°C
(52°F)		 2°C
(36°F)		 -1°C
(31°F)
Mean minimum -12°C
(11°F)		 -11°C
(12°F)		 -8°C
(17°F)		 -1°C
(30°F)		 3°C
(38°F)		 11°C
(52°F)		 16°C
(61°F)		 14°C
(58°F)		 9°C
(48°F)		 2°C
(36°F)		 -5°C
(24°F)		 -9°C
(17°F)
Minimum -17°C
(2°F)		 -17°C
(2°F)		 -14°C
(7°F)		 -3°C
(28°F)		 0°C
(33°F)		 8°C
(47°F)		 14°C
(57°F)		 13°C
(56°F)		 4°C
(39°F)		 1°C
(33°F)		 -6°C
(21°F)		 -13°C
(10°F)

Compare climate in Fairfield with other places

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

Monthly average precipitation in Fairfield, Pennsylvania, United States §

Fairfield usually has the most precipitation in May, July and August, with an average of 13 rainy days and 128 mm (5.1 inches) of precipitation per month.The driest months in Fairfield are January, November and December. On average, 80 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fairfield, 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) 62 (2.4) 97 (3.8) 94 (3.7) 98 (3.9) 132 (5.2) 103 (4.1) 134 (5.3) 118 (4.7) 118 (4.6) 100 (3.9) 86 (3.4) 92 (3.6)
Average precipitation days (≥ 1 mm) 8 11 11 12 14 12 12 14 9 10 7 9

Monthly sunshine hours in Fairfield, Pennsylvania, United States §

The sunniest months in Fairfield are June, July and August, when the sun shines an average of 10 hours 41 minutes a day.Least sunny months in Fairfield: January, February and December receive an average of 5 hours 28 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fairfield, 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 139 174 252 248 269 321 349 312 272 236 219 183
Mean daily daylight hours 9h 42m 10h 42m 11h 58m 13h 16m 14h 22m 14h 55m 14h 37m 13h 38m 12h 23m 11h 6m 9h 58m 9h 23m

Solar UV radiation in Fairfield, Pennsylvania, United States §

Fairfield 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 Fairfield UV Index data.

Average daily maximum UV levels by month for Fairfield, 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