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Monthly climate in Barnstable, Massachusetts, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Barnstable features a humid subtropical climate (Cfa).Temperatures typically range between 2 °C (36 °F) and 22 °C (72 °F) through the year, but rarely can drop to -14 °C (6 °F) or can rise to as high as 29 °C (84 °F).The average annual precipitation amounts to about 1378 mm (54.2 inches) and receives 128 rainy days on the 1 mm (0.04 inches) threshold annually.Barnstable enjoys an average of 3011 hours of sunshine throughout the year, and daylight varies from 9 hours 11 minutes to 15 hours 8 minutes per day.

Monthly average temperatures in Barnstable, Massachusetts, United States §

The warmest months in Barnstable are July, August and September, with daily mean temperatures ranging from 19 to 22 °C (67 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 2 to 3 °C (36 - 38 °F) throughout the day. On average each year, Barnstable experiences 7 days above 25 °C (77.0 °F) and 43 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Barnstable, 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 13°C
(55°F)		 11°C
(53°F)		 13°C
(56°F)		 16°C
(60°F)		 21°C
(70°F)		 24°C
(76°F)		 29°C
(84°F)		 27°C
(81°F)		 25°C
(78°F)		 22°C
(72°F)		 19°C
(66°F)		 15°C
(60°F)
Mean maximum 11°C
(52°F)		 10°C
(50°F)		 11°C
(51°F)		 13°C
(56°F)		 19°C
(66°F)		 22°C
(73°F)		 26°C
(80°F)		 26°C
(79°F)		 24°C
(75°F)		 21°C
(70°F)		 17°C
(63°F)		 13°C
(56°F)
Average high 4°C
(39°F)		 4°C
(40°F)		 5°C
(42°F)		 9°C
(48°F)		 13°C
(56°F)		 18°C
(65°F)		 23°C
(73°F)		 23°C
(74°F)		 20°C
(69°F)		 16°C
(62°F)		 11°C
(52°F)		 6°C
(44°F)
Daily mean 2°C
(36°F)		 2°C
(36°F)		 3°C
(38°F)		 7°C
(46°F)		 12°C
(53°F)		 17°C
(63°F)		 21°C
(71°F)		 22°C
(72°F)		 19°C
(67°F)		 15°C
(59°F)		 9°C
(48°F)		 4°C
(40°F)
Average low -0°C
(32°F)		 -0°C
(32°F)		 1°C
(35°F)		 6°C
(43°F)		 10°C
(51°F)		 16°C
(61°F)		 20°C
(69°F)		 21°C
(70°F)		 18°C
(65°F)		 13°C
(56°F)		 7°C
(44°F)		 2°C
(36°F)
Mean minimum -10°C
(14°F)		 -9°C
(17°F)		 -7°C
(20°F)		 2°C
(36°F)		 6°C
(44°F)		 12°C
(53°F)		 17°C
(63°F)		 18°C
(64°F)		 14°C
(58°F)		 8°C
(46°F)		 -2°C
(29°F)		 -5°C
(23°F)
Minimum -14°C
(6°F)		 -12°C
(10°F)		 -9°C
(16°F)		 1°C
(33°F)		 5°C
(41°F)		 10°C
(51°F)		 16°C
(61°F)		 16°C
(61°F)		 13°C
(56°F)		 4°C
(39°F)		 -6°C
(21°F)		 -12°C
(11°F)

Compare climate in Barnstable with other places

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

Monthly average precipitation in Barnstable, Massachusetts, United States §

Barnstable usually has the most precipitation in April, October and December, with an average of 12 rainy days and 149 mm (5.9 inches) of precipitation per month.The driest months in Barnstable are June, July and August. On average, 85 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Barnstable, 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) 94 (3.7) 123 (4.8) 118 (4.7) 137 (5.4) 119 (4.7) 91 (3.6) 83 (3.3) 82 (3.2) 118 (4.7) 175 (6.9) 102 (4.0) 136 (5.4)
Average precipitation days (≥ 1 mm) 10 12 10 13 12 10 9 8 10 12 10 12

Monthly sunshine hours in Barnstable, Massachusetts, United States §

The sunniest months in Barnstable are June, July and August, when the sun shines an average of 10 hours 53 minutes a day.Least sunny months in Barnstable: January, February and December receive an average of 5 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Barnstable, 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 142 183 257 242 297 326 346 330 280 236 203 164
Mean daily daylight hours 9h 31m 10h 36m 11h 58m 13h 22m 14h 33m 15h 8m 14h 49m 13h 45m 12h 25m 11h 1m 9h 48m 9h 11m

Solar UV radiation in Barnstable, Massachusetts, United States §

Barnstable 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 Barnstable UV Index data.

Average daily maximum UV levels by month for Barnstable, 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) 3 4 6 8 9 10 9 9 8 6 4 2