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Monthly climate in Westfield, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Westfield features a humid continental climate (Dfb).Temperatures typically range between -4 °C (25 °F) and 21 °C (71 °F) through the year, but rarely can drop to -24 °C (-10 °F) or can rise to as high as 33 °C (92 °F).The average annual precipitation amounts to about 1114 mm (43.9 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually.Westfield enjoys an average of 2631 hours of sunshine throughout the year, and daylight varies from 9 hours 9 minutes to 15 hours 10 minutes per day.

Monthly average temperatures in Westfield, Pennsylvania, United States §

The warmest months in Westfield are June, July and August, with daily mean temperatures ranging from 19 to 21 °C (66 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 31 °F) throughout the day. On average each year, Westfield experiences 53 days above 25 °C (77.0 °F) and 120 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Westfield, 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
(62°F)		 20°C
(68°F)		 21°C
(71°F)		 27°C
(80°F)		 30°C
(87°F)		 33°C
(92°F)		 33°C
(92°F)		 32°C
(90°F)		 31°C
(88°F)		 27°C
(81°F)		 23°C
(74°F)		 16°C
(61°F)
Mean maximum 11°C
(53°F)		 15°C
(59°F)		 18°C
(65°F)		 23°C
(74°F)		 29°C
(85°F)		 31°C
(87°F)		 31°C
(89°F)		 30°C
(87°F)		 29°C
(84°F)		 25°C
(78°F)		 18°C
(65°F)		 12°C
(53°F)
Average high -0°C
(32°F)		 2°C
(36°F)		 6°C
(43°F)		 12°C
(55°F)		 19°C
(66°F)		 23°C
(74°F)		 26°C
(80°F)		 25°C
(78°F)		 22°C
(72°F)		 16°C
(61°F)		 7°C
(45°F)		 2°C
(37°F)
Daily mean -4°C
(25°F)		 -2°C
(28°F)		 1°C
(35°F)		 7°C
(46°F)		 14°C
(57°F)		 19°C
(66°F)		 21°C
(71°F)		 20°C
(69°F)		 17°C
(62°F)		 11°C
(52°F)		 3°C
(38°F)		 -1°C
(31°F)
Average low -8°C
(19°F)		 -7°C
(20°F)		 -3°C
(27°F)		 3°C
(37°F)		 9°C
(49°F)		 14°C
(57°F)		 17°C
(63°F)		 16°C
(61°F)		 12°C
(54°F)		 7°C
(45°F)		 -1°C
(31°F)		 -4°C
(25°F)
Mean minimum -19°C
(-2°F)		 -20°C
(-3°F)		 -14°C
(8°F)		 -4°C
(25°F)		 1°C
(33°F)		 7°C
(45°F)		 11°C
(53°F)		 9°C
(49°F)		 5°C
(41°F)		 -1°C
(30°F)		 -11°C
(12°F)		 -14°C
(6°F)
Minimum -24°C
(-10°F)		 -23°C
(-10°F)		 -19°C
(-2°F)		 -6°C
(21°F)		 -4°C
(25°F)		 3°C
(38°F)		 10°C
(50°F)		 8°C
(47°F)		 0°C
(33°F)		 -3°C
(28°F)		 -21°C
(-6°F)		 -21°C
(-6°F)

Compare climate in Westfield with other places

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

Monthly average precipitation in Westfield, Pennsylvania, United States §

Westfield usually has the most precipitation in May, July and October, with an average of 13 rainy days and 120 mm (4.7 inches) of precipitation per month.The driest months in Westfield are January, March and November. On average, 73 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Westfield, 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) 67 (2.6) 84 (3.3) 75 (2.9) 109 (4.3) 116 (4.6) 95 (3.7) 124 (4.9) 79 (3.1) 89 (3.5) 119 (4.7) 78 (3.1) 80 (3.2)
Average precipitation days (≥ 1 mm) 10 13 13 16 14 12 14 12 8 13 11 12

Monthly sunshine hours in Westfield, Pennsylvania, United States §

The sunniest months in Westfield are June, July and August, when the sun shines an average of 10 hours 19 minutes a day.Least sunny months in Westfield: January, February and December receive an average of 4 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Westfield, 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 104 148 213 218 259 311 327 310 268 195 155 117
Mean daily daylight hours 9h 30m 10h 35m 11h 58m 13h 22m 14h 34m 15h 10m 14h 50m 13h 46m 12h 25m 11h 1m 9h 47m 9h 9m

Solar UV radiation in Westfield, Pennsylvania, United States §

Westfield 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 Westfield UV Index data.

Average daily maximum UV levels by month for Westfield, 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