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Monthly climate in South Deerfield, Massachusetts, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification South Deerfield features a humid continental climate (Dfb). Temperatures typically range between -3 °C (28 °F) and 23 °C (74 °F) through the year, but rarely can drop to -24 °C (-11 °F) or can rise to as high as 37 °C (100 °F). The average annual precipitation amounts to about 1238 mm (48.7 inches) and receives 127 rainy days on the 1 mm (0.04 inches) threshold annually. South Deerfield enjoys an average of 2906 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 South Deerfield, Massachusetts, United States §

The warmest months in South Deerfield 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 -3 to 0 °C (28 - 32 °F) throughout the day. On average each year, South Deerfield experiences 70 days above 25 °C (77.0 °F) and 108 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in South Deerfield, 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 18°C
(65°F)		 22°C
(73°F)		 22°C
(72°F)		 29°C
(84°F)		 33°C
(92°F)		 36°C
(96°F)		 37°C
(100°F)		 35°C
(95°F)		 33°C
(92°F)		 27°C
(82°F)		 24°C
(75°F)		 16°C
(62°F)
Mean maximum 12°C
(54°F)		 16°C
(62°F)		 19°C
(66°F)		 23°C
(73°F)		 31°C
(88°F)		 33°C
(93°F)		 35°C
(95°F)		 33°C
(92°F)		 31°C
(88°F)		 25°C
(77°F)		 20°C
(69°F)		 14°C
(58°F)
Average high 2°C
(35°F)		 3°C
(39°F)		 7°C
(45°F)		 13°C
(56°F)		 20°C
(68°F)		 26°C
(78°F)		 28°C
(83°F)		 28°C
(82°F)		 24°C
(75°F)		 17°C
(63°F)		 9°C
(48°F)		 3°C
(38°F)
Daily mean -3°C
(28°F)		 -1°C
(30°F)		 2°C
(36°F)		 8°C
(47°F)		 15°C
(59°F)		 20°C
(68°F)		 23°C
(74°F)		 22°C
(72°F)		 18°C
(65°F)		 12°C
(54°F)		 4°C
(40°F)		 -0°C
(32°F)
Average low -7°C
(20°F)		 -6°C
(22°F)		 -3°C
(27°F)		 4°C
(39°F)		 9°C
(49°F)		 14°C
(58°F)		 18°C
(65°F)		 17°C
(63°F)		 13°C
(56°F)		 8°C
(46°F)		 0°C
(32°F)		 -4°C
(25°F)
Mean minimum -19°C
(-2°F)		 -18°C
(0°F)		 -14°C
(7°F)		 -3°C
(27°F)		 3°C
(37°F)		 9°C
(49°F)		 13°C
(56°F)		 10°C
(51°F)		 5°C
(41°F)		 -0°C
(31°F)		 -10°C
(14°F)		 -15°C
(4°F)
Minimum -24°C
(-11°F)		 -21°C
(-6°F)		 -19°C
(-1°F)		 -4°C
(24°F)		 1°C
(34°F)		 4°C
(39°F)		 11°C
(53°F)		 8°C
(47°F)		 2°C
(35°F)		 -3°C
(27°F)		 -19°C
(-2°F)		 -22°C
(-8°F)

Compare climate in South Deerfield with other places

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

Monthly average precipitation in South Deerfield, Massachusetts, United States §

South Deerfield usually has the most precipitation in April, July and October, with an average of 12 rainy days and 139 mm (5.5 inches) of precipitation per month. The driest months in South Deerfield are January, March and June. On average, 78 mm (3.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Deerfield, 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) 78 (3.1) 92 (3.6) 81 (3.2) 135 (5.3) 95 (3.7) 76 (3.0) 136 (5.3) 86 (3.4) 93 (3.7) 147 (5.8) 98 (3.8) 121 (4.8)
Average precipitation days (≥ 1 mm) 9 11 9 13 12 11 12 11 8 11 10 10

Monthly sunshine hours in South Deerfield, Massachusetts, United States §

The sunniest months in South Deerfield are June, July and August, when the sun shines an average of 10 hours 31 minutes a day. Least sunny months in South Deerfield: January, February and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in South Deerfield, 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 145 180 249 233 271 319 326 321 275 211 196 173
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 44m 9h 6m

Solar UV radiation in South Deerfield, Massachusetts, United States §

South Deerfield 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 South Deerfield UV Index data.

Average daily maximum UV levels by month for South Deerfield, 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 8 6 4 2

Detailed Monthly Weather Insights for South Deerfield, Massachusetts, United States

Discover in-depth weather details for every month in South Deerfield. 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 South Deerfield'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.