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Monthly climate in Folsom, New Jersey, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Folsom features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (37 °F) and 26 °C (79 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1301 mm (51.2 inches) and receives 127 rainy days on the 1 mm (0.04 inches) threshold annually.Folsom enjoys an average of 3079 hours of sunshine throughout the year, and daylight varies from 9 hours 25 minutes to 14 hours 53 minutes per day.

Monthly average temperatures in Folsom, New Jersey, United States §

The warmest months in Folsom are June, July and August, with daily mean temperatures ranging from 23 to 26 °C (74 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 5 °C (37 - 41 °F) throughout the day. On average each year, Folsom experiences 98 days above 25 °C (77.0 °F) and 58 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Folsom, New Jersey, 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
(69°F)		 25°C
(76°F)		 29°C
(84°F)		 32°C
(91°F)		 35°C
(95°F)		 35°C
(95°F)		 37°C
(99°F)		 35°C
(96°F)		 34°C
(94°F)		 35°C
(96°F)		 24°C
(76°F)		 19°C
(67°F)
Mean maximum 18°C
(64°F)		 20°C
(68°F)		 24°C
(76°F)		 28°C
(83°F)		 33°C
(91°F)		 34°C
(93°F)		 35°C
(96°F)		 34°C
(93°F)		 32°C
(90°F)		 29°C
(84°F)		 23°C
(74°F)		 18°C
(64°F)
Average high 6°C
(44°F)		 9°C
(48°F)		 12°C
(53°F)		 17°C
(63°F)		 22°C
(72°F)		 28°C
(82°F)		 30°C
(87°F)		 29°C
(84°F)		 26°C
(79°F)		 21°C
(70°F)		 14°C
(57°F)		 9°C
(48°F)
Daily mean 3°C
(37°F)		 5°C
(41°F)		 7°C
(45°F)		 13°C
(55°F)		 18°C
(64°F)		 23°C
(74°F)		 26°C
(79°F)		 25°C
(77°F)		 22°C
(72°F)		 17°C
(62°F)		 9°C
(48°F)		 5°C
(41°F)
Average low -1°C
(30°F)		 1°C
(33°F)		 3°C
(38°F)		 8°C
(47°F)		 13°C
(56°F)		 19°C
(66°F)		 22°C
(72°F)		 21°C
(71°F)		 18°C
(65°F)		 13°C
(55°F)		 4°C
(40°F)		 1°C
(34°F)
Mean minimum -12°C
(11°F)		 -9°C
(15°F)		 -5°C
(24°F)		 1°C
(34°F)		 6°C
(43°F)		 13°C
(55°F)		 17°C
(63°F)		 17°C
(62°F)		 11°C
(51°F)		 4°C
(40°F)		 -5°C
(24°F)		 -7°C
(20°F)
Minimum -18°C
(0°F)		 -14°C
(6°F)		 -9°C
(17°F)		 -2°C
(29°F)		 3°C
(37°F)		 10°C
(50°F)		 15°C
(59°F)		 15°C
(59°F)		 7°C
(45°F)		 2°C
(36°F)		 -8°C
(18°F)		 -11°C
(12°F)

Compare climate in Folsom with other places

Compare temperature, precipitation, sunshine, UV index in Folsom, New Jersey, United States with other places around the world.

Monthly average precipitation in Folsom, New Jersey, United States §

Folsom usually has the most precipitation in July, August and October, with an average of 12 rainy days and 139 mm (5.5 inches) of precipitation per month.The driest months in Folsom are January, February and November. On average, 79 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Folsom, New Jersey, 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) 99 (3.9) 108 (4.2) 100 (4.0) 119 (4.7) 109 (4.3) 135 (5.3) 153 (6.0) 110 (4.3) 128 (5.0) 76 (3.0) 103 (4.1)
Average precipitation days (≥ 1 mm) 8 10 10 11 12 12 13 15 11 9 7 9

Monthly sunshine hours in Folsom, New Jersey, United States §

The sunniest months in Folsom are June, July and August, when the sun shines an average of 10 hours 59 minutes a day.Least sunny months in Folsom: January, February and December receive an average of 5 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Folsom, New Jersey, 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 153 179 254 259 296 331 357 322 279 237 224 182
Mean daily daylight hours 9h 44m 10h 43m 11h 58m 13h 15m 14h 21m 14h 53m 14h 35m 13h 37m 12h 23m 11h 6m 9h 59m 9h 25m

Solar UV radiation in Folsom, New Jersey, United States §

Folsom 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 Folsom UV Index data.

Average daily maximum UV levels by month for Folsom, New Jersey, 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 3