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Monthly climate in Mount Joy, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Mount Joy features a humid subtropical climate (Cfa).Temperatures typically range between 1 °C (35 °F) and 26 °C (79 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1229 mm (48.4 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Mount Joy enjoys an average of 2899 hours of sunshine throughout the year, and daylight varies from 9 hours 21 minutes to 14 hours 57 minutes per day.

Monthly average temperatures in Mount Joy, Pennsylvania, United States §

The warmest months in Mount Joy are June, July and August, with daily mean temperatures ranging from 23 to 26 °C (73 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 4 °C (35 - 39 °F) throughout the day. On average each year, Mount Joy experiences 100 days above 25 °C (77.0 °F) and 69 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mount Joy, 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
(81°F)		 26°C
(79°F)		 30°C
(87°F)		 33°C
(93°F)		 35°C
(95°F)		 36°C
(97°F)		 35°C
(96°F)		 34°C
(93°F)		 34°C
(93°F)		 24°C
(76°F)		 18°C
(65°F)
Mean maximum 16°C
(61°F)		 20°C
(68°F)		 24°C
(75°F)		 27°C
(82°F)		 32°C
(90°F)		 33°C
(93°F)		 35°C
(96°F)		 34°C
(93°F)		 32°C
(90°F)		 29°C
(85°F)		 23°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)		 23°C
(73°F)		 28°C
(82°F)		 30°C
(87°F)		 29°C
(84°F)		 26°C
(79°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
(79°F)		 24°C
(76°F)		 21°C
(70°F)		 16°C
(60°F)		 7°C
(45°F)		 4°C
(39°F)
Average low -2°C
(29°F)		 -1°C
(31°F)		 2°C
(36°F)		 8°C
(46°F)		 13°C
(56°F)		 18°C
(65°F)		 21°C
(71°F)		 20°C
(69°F)		 17°C
(63°F)		 11°C
(53°F)		 3°C
(38°F)		 -0°C
(32°F)
Mean minimum -11°C
(13°F)		 -10°C
(14°F)		 -7°C
(19°F)		 -0°C
(32°F)		 5°C
(41°F)		 12°C
(53°F)		 17°C
(62°F)		 15°C
(59°F)		 10°C
(49°F)		 3°C
(38°F)		 -5°C
(24°F)		 -8°C
(18°F)
Minimum -15°C
(5°F)		 -16°C
(3°F)		 -16°C
(3°F)		 -2°C
(28°F)		 1°C
(34°F)		 9°C
(49°F)		 15°C
(59°F)		 13°C
(56°F)		 5°C
(42°F)		 2°C
(36°F)		 -7°C
(20°F)		 -12°C
(11°F)

Compare climate in Mount Joy with other places

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

Monthly average precipitation in Mount Joy, Pennsylvania, United States §

Mount Joy usually has the most precipitation in May, July and August, with an average of 13 rainy days and 128 mm (5.0 inches) of precipitation per month.The driest months in Mount Joy are January, November and December. On average, 80 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mount Joy, 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) 101 (4.0) 99 (3.9) 98 (3.9) 125 (4.9) 97 (3.8) 130 (5.1) 130 (5.1) 108 (4.2) 101 (4.0) 88 (3.5) 93 (3.7)
Average precipitation days (≥ 1 mm) 8 12 10 11 14 12 12 15 9 10 7 9

Monthly sunshine hours in Mount Joy, Pennsylvania, United States §

The sunniest months in Mount Joy are June, July and August, when the sun shines an average of 10 hours 29 minutes a day.Least sunny months in Mount Joy: January, February and December receive an average of 5 hours 19 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mount Joy, 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 133 171 239 240 263 311 347 306 266 221 216 179
Mean daily daylight hours 9h 40m 10h 41m 11h 58m 13h 17m 14h 24m 14h 57m 14h 39m 13h 40m 12h 24m 11h 5m 9h 56m 9h 21m

Solar UV radiation in Mount Joy, Pennsylvania, United States §

Mount Joy 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 Mount Joy UV Index data.

Average daily maximum UV levels by month for Mount Joy, 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