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Monthly climate in South Williamson, Kentucky, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification South Williamson features a humid subtropical climate (Cfa).Temperatures typically range between 3 °C (37 °F) and 25 °C (76 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 1505 mm (59.3 inches) and receives 151 rainy days on the 1 mm (0.04 inches) threshold annually.South Williamson enjoys an average of 2938 hours of sunshine throughout the year, and daylight varies from 9 hours 35 minutes to 14 hours 42 minutes per day.

Monthly average temperatures in South Williamson, Kentucky, United States §

The warmest months in South Williamson are June, July and August, with daily mean temperatures ranging from 22 to 25 °C (72 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 6 °C (37 - 43 °F) throughout the day. On average each year, South Williamson experiences 114 days above 25 °C (77.0 °F) and 60 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 Williamson, 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 24°C
(75°F)		 27°C
(80°F)		 28°C
(83°F)		 31°C
(88°F)		 32°C
(90°F)		 35°C
(95°F)		 35°C
(95°F)		 33°C
(93°F)		 35°C
(95°F)		 34°C
(94°F)		 27°C
(81°F)		 20°C
(69°F)
Mean maximum 20°C
(68°F)		 23°C
(74°F)		 26°C
(79°F)		 29°C
(84°F)		 31°C
(88°F)		 32°C
(90°F)		 34°C
(93°F)		 32°C
(90°F)		 32°C
(90°F)		 30°C
(86°F)		 24°C
(76°F)		 19°C
(67°F)
Average high 7°C
(45°F)		 11°C
(52°F)		 15°C
(58°F)		 19°C
(67°F)		 24°C
(75°F)		 27°C
(81°F)		 30°C
(86°F)		 28°C
(84°F)		 27°C
(80°F)		 21°C
(71°F)		 13°C
(56°F)		 10°C
(50°F)
Daily mean 3°C
(37°F)		 6°C
(43°F)		 9°C
(48°F)		 13°C
(56°F)		 19°C
(66°F)		 22°C
(72°F)		 25°C
(76°F)		 23°C
(74°F)		 21°C
(70°F)		 16°C
(61°F)		 8°C
(46°F)		 5°C
(42°F)
Average low -1°C
(31°F)		 1°C
(34°F)		 4°C
(39°F)		 8°C
(47°F)		 14°C
(58°F)		 18°C
(64°F)		 20°C
(69°F)		 19°C
(67°F)		 17°C
(62°F)		 11°C
(52°F)		 3°C
(37°F)		 1°C
(34°F)
Mean minimum -13°C
(10°F)		 -10°C
(14°F)		 -7°C
(20°F)		 -2°C
(29°F)		 4°C
(40°F)		 12°C
(54°F)		 15°C
(59°F)		 14°C
(58°F)		 10°C
(50°F)		 1°C
(34°F)		 -5°C
(23°F)		 -8°C
(17°F)
Minimum -17°C
(2°F)		 -15°C
(6°F)		 -12°C
(11°F)		 -4°C
(26°F)		 1°C
(34°F)		 8°C
(47°F)		 13°C
(55°F)		 12°C
(55°F)		 8°C
(46°F)		 -1°C
(31°F)		 -10°C
(15°F)		 -13°C
(9°F)

Compare climate in South Williamson with other places

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

Monthly average precipitation in South Williamson, Kentucky, United States §

South Williamson usually has the most precipitation in February, May and June, with an average of 15 rainy days and 155 mm (6.1 inches) of precipitation per month.The driest months in South Williamson are January, September and November. On average, 96 mm (3.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in South Williamson, 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) 101 (4.0) 170 (6.7) 129 (5.1) 133 (5.2) 136 (5.4) 158 (6.2) 119 (4.7) 121 (4.8) 107 (4.2) 124 (4.9) 81 (3.2) 126 (4.9)
Average precipitation days (≥ 1 mm) 12 16 14 13 14 15 13 14 9 10 9 12

Monthly sunshine hours in South Williamson, Kentucky, United States §

The sunniest months in South Williamson are June, July and August, when the sun shines an average of 10 hours 33 minutes a day.Least sunny months in South Williamson: 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 South Williamson, 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 127 155 230 245 297 309 343 317 281 253 213 162
Mean daily daylight hours 9h 53m 10h 48m 11h 59m 13h 11m 14h 12m 14h 42m 14h 26m 13h 32m 12h 22m 11h 10m 10h 7m 9h 35m

Solar UV radiation in South Williamson, Kentucky, United States §

South Williamson experiences the highest level of ultraviolet (UV) radiation in May, July and August, 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 South Williamson UV Index data.

Average daily maximum UV levels by month for South Williamson, 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 6 7 9 10 10 11 10 9 7 5 3