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Monthly climate in Hellertown, Pennsylvania, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hellertown features a humid subtropical climate (Cfa).Temperatures typically range between 1 °C (33 °F) and 25 °C (77 °F) through the year, but rarely can drop to -20 °C (-3 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 1302 mm (51.3 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually.Hellertown enjoys an average of 2928 hours of sunshine throughout the year, and daylight varies from 9 hours 19 minutes to 14 hours 59 minutes per day.

Monthly average temperatures in Hellertown, Pennsylvania, United States §

The warmest months in Hellertown are June, July and August, with daily mean temperatures ranging from 22 to 25 °C (71 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 3 °C (33 - 37 °F) throughout the day. On average each year, Hellertown experiences 90 days above 25 °C (77.0 °F) and 83 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hellertown, 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
(66°F)		 26°C
(79°F)		 27°C
(80°F)		 30°C
(86°F)		 33°C
(92°F)		 35°C
(95°F)		 36°C
(97°F)		 35°C
(94°F)		 34°C
(93°F)		 33°C
(93°F)		 24°C
(76°F)		 18°C
(64°F)
Mean maximum 15°C
(59°F)		 19°C
(66°F)		 23°C
(73°F)		 27°C
(81°F)		 32°C
(89°F)		 33°C
(92°F)		 35°C
(95°F)		 33°C
(93°F)		 32°C
(90°F)		 28°C
(83°F)		 22°C
(73°F)		 16°C
(61°F)
Average high 4°C
(40°F)		 7°C
(44°F)		 10°C
(51°F)		 16°C
(61°F)		 22°C
(71°F)		 27°C
(80°F)		 30°C
(86°F)		 28°C
(83°F)		 25°C
(78°F)		 19°C
(67°F)		 11°C
(53°F)		 6°C
(44°F)
Daily mean 1°C
(33°F)		 2°C
(36°F)		 5°C
(42°F)		 11°C
(52°F)		 17°C
(62°F)		 22°C
(71°F)		 25°C
(77°F)		 24°C
(75°F)		 20°C
(69°F)		 15°C
(59°F)		 7°C
(44°F)		 3°C
(37°F)
Average low -3°C
(27°F)		 -2°C
(29°F)		 1°C
(34°F)		 6°C
(43°F)		 12°C
(54°F)		 16°C
(62°F)		 20°C
(69°F)		 19°C
(67°F)		 16°C
(61°F)		 10°C
(51°F)		 2°C
(36°F)		 -1°C
(30°F)
Mean minimum -13°C
(9°F)		 -12°C
(11°F)		 -9°C
(16°F)		 -1°C
(30°F)		 4°C
(40°F)		 11°C
(52°F)		 15°C
(59°F)		 14°C
(57°F)		 8°C
(47°F)		 2°C
(36°F)		 -6°C
(21°F)		 -10°C
(15°F)
Minimum -19°C
(-3°F)		 -17°C
(1°F)		 -20°C
(-3°F)		 -3°C
(27°F)		 1°C
(33°F)		 7°C
(46°F)		 13°C
(56°F)		 13°C
(55°F)		 4°C
(40°F)		 0°C
(33°F)		 -12°C
(12°F)		 -14°C
(8°F)

Compare climate in Hellertown with other places

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

Monthly average precipitation in Hellertown, Pennsylvania, United States §

Hellertown usually has the most precipitation in May, July and August, with an average of 13 rainy days and 143 mm (5.6 inches) of precipitation per month.The driest months in Hellertown are January, September and November. On average, 84 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hellertown, 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) 106 (4.2) 103 (4.0) 101 (4.0) 140 (5.5) 103 (4.1) 137 (5.4) 152 (6.0) 99 (3.9) 108 (4.3) 85 (3.4) 100 (4.0)
Average precipitation days (≥ 1 mm) 8 12 11 12 14 13 12 13 9 10 8 10

Monthly sunshine hours in Hellertown, Pennsylvania, United States §

The sunniest months in Hellertown are June, July and August, when the sun shines an average of 10 hours 28 minutes a day.Least sunny months in Hellertown: January, February and December receive an average of 5 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hellertown, 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 141 175 244 246 272 310 344 307 267 221 216 178
Mean daily daylight hours 9h 38m 10h 40m 11h 58m 13h 18m 14h 26m 14h 59m 14h 41m 13h 41m 12h 24m 11h 4m 9h 54m 9h 19m

Solar UV radiation in Hellertown, Pennsylvania, United States §

Hellertown 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 Hellertown UV Index data.

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