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Monthly climate in Summertown, Tennessee, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Summertown features a humid subtropical climate (Cfa).Temperatures typically range between 5 °C (42 °F) and 26 °C (80 °F) through the year, but rarely can drop to -15 °C (6 °F) or can rise to as high as 37 °C (98 °F).The average annual precipitation amounts to about 1564 mm (61.6 inches) and receives 138 rainy days on the 1 mm (0.04 inches) threshold annually.Summertown enjoys an average of 2985 hours of sunshine throughout the year, and daylight varies from 9 hours 47 minutes to 14 hours 29 minutes per day.

Monthly average temperatures in Summertown, Tennessee, United States §

The warmest months in Summertown are June, July and August, with daily mean temperatures ranging from 25 to 26 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 8 °C (42 - 46 °F) throughout the day. On average each year, Summertown experiences 136 days above 25 °C (77.0 °F) and 42 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Summertown, Tennessee, 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 23°C
(74°F)		 26°C
(79°F)		 28°C
(83°F)		 31°C
(88°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(97°F)		 35°C
(95°F)		 36°C
(98°F)		 37°C
(98°F)		 26°C
(79°F)		 23°C
(74°F)
Mean maximum 21°C
(69°F)		 24°C
(75°F)		 26°C
(79°F)		 28°C
(84°F)		 33°C
(91°F)		 33°C
(92°F)		 35°C
(95°F)		 34°C
(94°F)		 34°C
(93°F)		 31°C
(89°F)		 24°C
(75°F)		 21°C
(70°F)
Average high 10°C
(50°F)		 13°C
(56°F)		 17°C
(64°F)		 21°C
(70°F)		 26°C
(79°F)		 30°C
(86°F)		 31°C
(89°F)		 31°C
(87°F)		 29°C
(84°F)		 23°C
(74°F)		 15°C
(60°F)		 13°C
(55°F)
Daily mean 5°C
(42°F)		 8°C
(46°F)		 12°C
(54°F)		 15°C
(60°F)		 21°C
(70°F)		 25°C
(77°F)		 26°C
(80°F)		 25°C
(78°F)		 23°C
(74°F)		 17°C
(64°F)		 9°C
(49°F)		 8°C
(46°F)
Average low 1°C
(34°F)		 3°C
(38°F)		 7°C
(44°F)		 10°C
(50°F)		 16°C
(61°F)		 20°C
(69°F)		 22°C
(72°F)		 21°C
(70°F)		 18°C
(65°F)		 12°C
(54°F)		 4°C
(39°F)		 3°C
(38°F)
Mean minimum -10°C
(15°F)		 -7°C
(19°F)		 -4°C
(25°F)		 0°C
(32°F)		 7°C
(45°F)		 15°C
(59°F)		 18°C
(64°F)		 16°C
(61°F)		 11°C
(52°F)		 2°C
(36°F)		 -4°C
(24°F)		 -6°C
(22°F)
Minimum -15°C
(6°F)		 -14°C
(8°F)		 -7°C
(19°F)		 -1°C
(30°F)		 2°C
(36°F)		 11°C
(53°F)		 16°C
(61°F)		 15°C
(59°F)		 9°C
(48°F)		 1°C
(33°F)		 -9°C
(16°F)		 -10°C
(15°F)

Compare climate in Summertown with other places

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

Monthly average precipitation in Summertown, Tennessee, United States §

Summertown usually has the most precipitation in February, March and April, with an average of 12 rainy days and 170 mm (6.7 inches) of precipitation per month.The driest months in Summertown are January, May and November. On average, 99 mm (3.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Summertown, Tennessee, 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) 110 (4.3) 175 (6.9) 172 (6.8) 163 (6.4) 113 (4.5) 128 (5.0) 120 (4.7) 128 (5.0) 118 (4.7) 117 (4.6) 74 (2.9) 147 (5.8)
Average precipitation days (≥ 1 mm) 9 14 13 11 12 12 15 14 9 10 8 11

Monthly sunshine hours in Summertown, Tennessee, United States §

The sunniest months in Summertown are June, July and August, when the sun shines an average of 10 hours 29 minutes a day.Least sunny months in Summertown: January, February and December receive an average of 5 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Summertown, Tennessee, 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 143 152 214 262 301 314 337 312 280 264 222 179
Mean daily daylight hours 10h 3m 10h 54m 11h 59m 13h 6m 14h 2m 14h 29m 14h 14m 13h 25m 12h 20m 11h 14m 10h 16m 9h 47m

Solar UV radiation in Summertown, Tennessee, United States §

Summertown experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Summertown UV Index data.

Average daily maximum UV levels by month for Summertown, Tennessee, 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) 4 6 7 10 10 11 11 10 9 7 5 3