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Monthly climate in Arlington, Massachusetts, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Arlington features a humid continental climate (Dfa). Temperatures typically range between -1 °C (31 °F) and 23 °C (74 °F) through the year, but rarely can drop to -21 °C (-6 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 1174 mm (46.2 inches) and receives 122 rainy days on the 1 mm (0.04 inches) threshold annually. Arlington enjoys an average of 2988 hours of sunshine throughout the year, and daylight varies from 9 hours 6 minutes to 15 hours 13 minutes per day.

Monthly average temperatures in Arlington, Massachusetts, United States §

The warmest months in Arlington are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (69 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 1 °C (31 - 34 °F) throughout the day. On average each year, Arlington experiences 71 days above 25 °C (77.0 °F) and 98 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arlington, 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 21°C
(69°F)		 22°C
(73°F)		 22°C
(73°F)		 30°C
(86°F)		 35°C
(95°F)		 37°C
(98°F)		 37°C
(98°F)		 35°C
(96°F)		 35°C
(94°F)		 29°C
(84°F)		 24°C
(76°F)		 17°C
(63°F)
Mean maximum 14°C
(57°F)		 18°C
(65°F)		 19°C
(67°F)		 23°C
(73°F)		 32°C
(89°F)		 33°C
(91°F)		 35°C
(95°F)		 34°C
(93°F)		 31°C
(89°F)		 26°C
(79°F)		 22°C
(71°F)		 16°C
(60°F)
Average high 3°C
(38°F)		 5°C
(41°F)		 8°C
(46°F)		 14°C
(57°F)		 20°C
(68°F)		 25°C
(78°F)		 28°C
(83°F)		 28°C
(83°F)		 24°C
(75°F)		 18°C
(64°F)		 10°C
(51°F)		 5°C
(41°F)
Daily mean -1°C
(31°F)		 0°C
(33°F)		 3°C
(38°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(69°F)		 23°C
(74°F)		 23°C
(74°F)		 19°C
(67°F)		 13°C
(56°F)		 6°C
(43°F)		 1°C
(34°F)
Average low -5°C
(24°F)		 -4°C
(25°F)		 -1°C
(30°F)		 5°C
(41°F)		 10°C
(51°F)		 15°C
(60°F)		 19°C
(66°F)		 19°C
(66°F)		 15°C
(58°F)		 9°C
(48°F)		 1°C
(34°F)		 -3°C
(27°F)
Mean minimum -17°C
(2°F)		 -15°C
(5°F)		 -12°C
(10°F)		 -2°C
(29°F)		 4°C
(39°F)		 10°C
(49°F)		 14°C
(58°F)		 13°C
(55°F)		 7°C
(45°F)		 0°C
(33°F)		 -8°C
(19°F)		 -13°C
(8°F)
Minimum -21°C
(-6°F)		 -18°C
(1°F)		 -18°C
(0°F)		 -3°C
(26°F)		 2°C
(36°F)		 6°C
(43°F)		 13°C
(56°F)		 11°C
(52°F)		 4°C
(40°F)		 -4°C
(25°F)		 -12°C
(10°F)		 -19°C
(-3°F)

Compare climate in Arlington with other places

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

Monthly average precipitation in Arlington, Massachusetts, United States §

Arlington usually has the most precipitation in April, July and October, with an average of 11 rainy days and 128 mm (5.0 inches) of precipitation per month. The driest months in Arlington are January, August and September. On average, 76 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arlington, 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) 71 (2.8) 87 (3.4) 89 (3.5) 127 (5.0) 86 (3.4) 85 (3.4) 125 (4.9) 79 (3.1) 79 (3.1) 132 (5.2) 95 (3.7) 119 (4.7)
Average precipitation days (≥ 1 mm) 8 10 9 12 11 11 13 11 7 10 10 10

Monthly sunshine hours in Arlington, Massachusetts, United States §

The sunniest months in Arlington are June, July and August, when the sun shines an average of 10 hours 44 minutes a day. Least sunny months in Arlington: January, February and December receive an average of 5 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arlington, 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 152 187 253 239 289 326 334 327 277 221 200 178
Mean daily daylight hours 9h 27m 10h 33m 11h 57m 13h 24m 14h 37m 15h 13m 14h 53m 13h 48m 12h 25m 11h 0m 9h 45m 9h 6m

Solar UV radiation in Arlington, Massachusetts, United States §

Arlington 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, 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 Arlington UV Index data.

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

Detailed Monthly Weather Insights for Arlington, Massachusetts, United States

Discover in-depth weather details for every month in Arlington. 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 Arlington'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.