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Monthly climate in Hamilton Worcester, Massachusetts, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hamilton Worcester features a humid continental climate (Dfb).Temperatures typically range between -2 °C (29 °F) and 23 °C (74 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1278 mm (50.3 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually.Hamilton Worcester enjoys an average of 2909 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 Hamilton Worcester, Massachusetts, United States §

The warmest months in Hamilton Worcester are June, July and August, with daily mean temperatures ranging from 20 to 23 °C (68 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 0 °C (29 - 33 °F) throughout the day. On average each year, Hamilton Worcester experiences 67 days above 25 °C (77.0 °F) and 101 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hamilton Worcester, 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 19°C
(67°F)		 22°C
(71°F)		 22°C
(71°F)		 29°C
(84°F)		 34°C
(93°F)		 35°C
(96°F)		 37°C
(99°F)		 34°C
(94°F)		 34°C
(94°F)		 27°C
(81°F)		 24°C
(75°F)		 17°C
(62°F)
Mean maximum 13°C
(56°F)		 17°C
(63°F)		 19°C
(66°F)		 22°C
(72°F)		 31°C
(88°F)		 33°C
(91°F)		 35°C
(95°F)		 33°C
(91°F)		 31°C
(87°F)		 25°C
(78°F)		 21°C
(70°F)		 15°C
(59°F)
Average high 2°C
(36°F)		 4°C
(40°F)		 7°C
(45°F)		 13°C
(56°F)		 19°C
(67°F)		 25°C
(78°F)		 28°C
(83°F)		 27°C
(82°F)		 23°C
(74°F)		 17°C
(63°F)		 10°C
(50°F)		 4°C
(40°F)
Daily mean -2°C
(29°F)		 -0°C
(32°F)		 3°C
(37°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(68°F)		 23°C
(74°F)		 22°C
(73°F)		 19°C
(66°F)		 13°C
(55°F)		 5°C
(42°F)		 0°C
(33°F)
Average low -5°C
(22°F)		 -5°C
(24°F)		 -2°C
(29°F)		 4°C
(40°F)		 10°C
(50°F)		 15°C
(59°F)		 19°C
(66°F)		 18°C
(65°F)		 14°C
(58°F)		 9°C
(48°F)		 1°C
(34°F)		 -4°C
(26°F)
Mean minimum -18°C
(0°F)		 -16°C
(4°F)		 -12°C
(10°F)		 -2°C
(28°F)		 3°C
(38°F)		 10°C
(49°F)		 14°C
(57°F)		 12°C
(54°F)		 7°C
(45°F)		 -1°C
(31°F)		 -8°C
(18°F)		 -14°C
(8°F)
Minimum -22°C
(-7°F)		 -19°C
(-2°F)		 -14°C
(6°F)		 -4°C
(25°F)		 1°C
(34°F)		 6°C
(42°F)		 12°C
(54°F)		 10°C
(50°F)		 4°C
(40°F)		 -6°C
(21°F)		 -13°C
(8°F)		 -20°C
(-5°F)

Compare climate in Hamilton Worcester with other places

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

Monthly average precipitation in Hamilton Worcester, Massachusetts, United States §

Hamilton Worcester usually has the most precipitation in April, July and October, with an average of 13 rainy days and 140 mm (5.5 inches) of precipitation per month.The driest months in Hamilton Worcester are January, February and March. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hamilton Worcester, 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) 72 (2.8) 88 (3.5) 90 (3.5) 130 (5.1) 94 (3.7) 95 (3.7) 150 (5.9) 101 (4.0) 93 (3.7) 141 (5.5) 101 (4.0) 123 (4.9)
Average precipitation days (≥ 1 mm) 8 10 9 13 12 12 14 11 8 12 10 10

Monthly sunshine hours in Hamilton Worcester, Massachusetts, United States §

The sunniest months in Hamilton Worcester are June, July and August, when the sun shines an average of 10 hours 27 minutes a day.Least sunny months in Hamilton Worcester: January, February and December receive an average of 5 hours 36 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hamilton Worcester, 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 149 184 249 230 277 318 325 318 270 209 197 177
Mean daily daylight hours 9h 28m 10h 34m 11h 57m 13h 23m 14h 36m 15h 12m 14h 52m 13h 47m 12h 25m 11h 0m 9h 46m 9h 7m

Solar UV radiation in Hamilton Worcester, Massachusetts, United States §

Hamilton Worcester 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 Hamilton Worcester UV Index data.

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