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Monthly climate in Simpsonville, Kentucky, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Simpsonville features a humid subtropical climate (Cfa).Temperatures typically range between 2 °C (35 °F) and 25 °C (78 °F) through the year, but rarely can drop to -21 °C (-6 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1450 mm (57.1 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually.Simpsonville enjoys an average of 2885 hours of sunshine throughout the year, and daylight varies from 9 hours 32 minutes to 14 hours 46 minutes per day.

Monthly average temperatures in Simpsonville, Kentucky, United States §

The warmest months in Simpsonville are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (74 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (35 - 41 °F) throughout the day. On average each year, Simpsonville experiences 118 days above 25 °C (77.0 °F) and 63 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Simpsonville, Kentucky, 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 20°C
(68°F)		 26°C
(80°F)		 27°C
(81°F)		 29°C
(85°F)		 33°C
(91°F)		 34°C
(93°F)		 35°C
(96°F)		 34°C
(94°F)		 35°C
(96°F)		 35°C
(95°F)		 27°C
(81°F)		 21°C
(71°F)
Mean maximum 18°C
(65°F)		 21°C
(70°F)		 24°C
(76°F)		 28°C
(83°F)		 31°C
(89°F)		 33°C
(91°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(87°F)		 22°C
(72°F)		 19°C
(67°F)
Average high 6°C
(43°F)		 9°C
(48°F)		 14°C
(57°F)		 19°C
(66°F)		 24°C
(76°F)		 28°C
(83°F)		 30°C
(87°F)		 29°C
(85°F)		 27°C
(81°F)		 21°C
(70°F)		 12°C
(54°F)		 9°C
(49°F)
Daily mean 2°C
(35°F)		 4°C
(40°F)		 9°C
(48°F)		 13°C
(56°F)		 19°C
(67°F)		 23°C
(74°F)		 25°C
(78°F)		 24°C
(76°F)		 22°C
(71°F)		 16°C
(60°F)		 7°C
(45°F)		 5°C
(41°F)
Average low -2°C
(29°F)		 0°C
(32°F)		 4°C
(39°F)		 8°C
(47°F)		 15°C
(59°F)		 19°C
(66°F)		 21°C
(70°F)		 20°C
(68°F)		 17°C
(63°F)		 11°C
(52°F)		 3°C
(37°F)		 1°C
(34°F)
Mean minimum -15°C
(6°F)		 -11°C
(12°F)		 -7°C
(20°F)		 -1°C
(30°F)		 5°C
(41°F)		 13°C
(56°F)		 16°C
(62°F)		 14°C
(58°F)		 10°C
(50°F)		 1°C
(35°F)		 -6°C
(22°F)		 -8°C
(17°F)
Minimum -21°C
(-6°F)		 -16°C
(3°F)		 -12°C
(11°F)		 -3°C
(27°F)		 -0°C
(32°F)		 9°C
(49°F)		 15°C
(59°F)		 13°C
(55°F)		 8°C
(46°F)		 -1°C
(31°F)		 -11°C
(13°F)		 -14°C
(8°F)

Compare climate in Simpsonville with other places

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

Monthly average precipitation in Simpsonville, Kentucky, United States §

Simpsonville usually has the most precipitation in March, April and June, with an average of 12 rainy days and 151 mm (6.0 inches) of precipitation per month.The driest months in Simpsonville are January, August and November. On average, 94 mm (3.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Simpsonville, Kentucky, 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) 91 (3.6) 140 (5.5) 141 (5.6) 145 (5.7) 125 (4.9) 168 (6.6) 104 (4.1) 100 (3.9) 123 (4.8) 107 (4.2) 90 (3.5) 116 (4.6)
Average precipitation days (≥ 1 mm) 10 14 13 13 15 12 12 12 9 11 9 10

Monthly sunshine hours in Simpsonville, Kentucky, United States §

The sunniest months in Simpsonville are June, July and August, when the sun shines an average of 10 hours 35 minutes a day.Least sunny months in Simpsonville: January, February and December receive an average of 4 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Simpsonville, Kentucky, 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 126 150 217 239 285 316 343 314 277 247 199 167
Mean daily daylight hours 9h 50m 10h 46m 11h 58m 13h 13m 14h 15m 14h 46m 14h 29m 13h 33m 12h 22m 11h 9m 10h 4m 9h 32m

Solar UV radiation in Simpsonville, Kentucky, United States §

Simpsonville experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High 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 4. For more detailed information, check out our hourly Simpsonville UV Index data.

Average daily maximum UV levels by month for Simpsonville, Kentucky, 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 7 9 10 10 10 10 8 7 4 3