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Monthly climate in Norwell, Massachusetts, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Norwell features a humid subtropical climate (Cfa). Temperatures typically range between 1 °C (34 °F) and 21 °C (71 °F) through the year, but rarely can drop to -16 °C (3 °F) or can rise to as high as 30 °C (86 °F). The average annual precipitation amounts to about 1422 mm (56.0 inches) and receives 127 rainy days on the 1 mm (0.04 inches) threshold annually. Norwell enjoys an average of 3020 hours of sunshine throughout the year, and daylight varies from 9 hours 7 minutes to 15 hours 12 minutes per day.

Monthly average temperatures in Norwell, Massachusetts, United States §

The warmest months in Norwell are July, August and September, 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 March, when daily mean temperatures range from 1 to 3 °C (34 - 38 °F) throughout the day. On average each year, Norwell experiences 9 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 Norwell, Massachusetts, 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 15°C
(60°F)		 13°C
(56°F)		 15°C
(59°F)		 18°C
(66°F)		 23°C
(73°F)		 25°C
(78°F)		 30°C
(85°F)		 28°C
(83°F)		 30°C
(86°F)		 23°C
(73°F)		 20°C
(68°F)		 15°C
(59°F)
Mean maximum 12°C
(53°F)		 11°C
(53°F)		 13°C
(55°F)		 15°C
(59°F)		 22°C
(71°F)		 23°C
(74°F)		 27°C
(81°F)		 27°C
(82°F)		 25°C
(77°F)		 21°C
(71°F)		 18°C
(64°F)		 14°C
(57°F)
Average high 4°C
(39°F)		 4°C
(40°F)		 5°C
(42°F)		 9°C
(49°F)		 14°C
(57°F)		 19°C
(66°F)		 23°C
(73°F)		 23°C
(74°F)		 20°C
(69°F)		 16°C
(61°F)		 10°C
(51°F)		 6°C
(42°F)
Daily mean 1°C
(34°F)		 2°C
(35°F)		 3°C
(38°F)		 7°C
(45°F)		 12°C
(54°F)		 17°C
(63°F)		 21°C
(70°F)		 21°C
(71°F)		 19°C
(66°F)		 14°C
(58°F)		 8°C
(46°F)		 3°C
(38°F)
Average low -2°C
(29°F)		 -1°C
(30°F)		 1°C
(33°F)		 5°C
(42°F)		 10°C
(50°F)		 15°C
(60°F)		 19°C
(67°F)		 20°C
(68°F)		 17°C
(63°F)		 12°C
(55°F)		 5°C
(42°F)		 1°C
(34°F)
Mean minimum -13°C
(10°F)		 -11°C
(13°F)		 -8°C
(17°F)		 1°C
(34°F)		 6°C
(43°F)		 11°C
(52°F)		 16°C
(62°F)		 16°C
(62°F)		 13°C
(56°F)		 6°C
(44°F)		 -3°C
(26°F)		 -7°C
(19°F)
Minimum -16°C
(3°F)		 -14°C
(8°F)		 -10°C
(14°F)		 -1°C
(31°F)		 4°C
(39°F)		 10°C
(50°F)		 15°C
(59°F)		 15°C
(60°F)		 12°C
(53°F)		 3°C
(37°F)		 -9°C
(17°F)		 -15°C
(6°F)

Compare climate in Norwell with other places

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

Monthly average precipitation in Norwell, Massachusetts, United States §

Norwell usually has the most precipitation in April, October and December, with an average of 12 rainy days and 163 mm (6.4 inches) of precipitation per month. The driest months in Norwell are January, June and August. On average, 86 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Norwell, Massachusetts, 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) 97 (3.8) 122 (4.8) 118 (4.7) 159 (6.3) 110 (4.3) 94 (3.7) 104 (4.1) 66 (2.6) 107 (4.2) 182 (7.2) 115 (4.5) 147 (5.8)
Average precipitation days (≥ 1 mm) 9 11 11 13 12 9 10 9 9 12 11 11

Monthly sunshine hours in Norwell, Massachusetts, United States §

The sunniest months in Norwell are June, July and August, when the sun shines an average of 10 hours 52 minutes a day. Least sunny months in Norwell: January, February and December receive an average of 5 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Norwell, Massachusetts, 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 151 188 254 243 295 330 339 330 280 227 201 176
Mean daily daylight hours 9h 28m 10h 34m 11h 57m 13h 23m 14h 35m 15h 12m 14h 52m 13h 47m 12h 25m 11h 0m 9h 46m 9h 7m

Solar UV radiation in Norwell, Massachusetts, United States §

Norwell experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, February 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 Norwell UV Index data.

Average daily maximum UV levels by month for Norwell, Massachusetts, 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) 2 4 5 8 9 10 9 9 7 6 4 2

Detailed Monthly Weather Insights for Norwell, Massachusetts, United States

Discover in-depth weather details for every month in Norwell. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Norwell's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.