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Monthly climate in Knox, Indiana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Knox features a humid continental climate (Dfa).Temperatures typically range between -2 °C (28 °F) and 24 °C (76 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1192 mm (46.9 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually.Knox enjoys an average of 2883 hours of sunshine throughout the year, and daylight varies from 9 hours 14 minutes to 15 hours 5 minutes per day.

Monthly average temperatures in Knox, Indiana, United States §

The warmest months in Knox are June, July and August, with daily mean temperatures ranging from 23 to 24 °C (73 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to 1 °C (28 - 34 °F) throughout the day. On average each year, Knox experiences 90 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 Knox, Indiana, 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)		 21°C
(71°F)		 26°C
(78°F)		 29°C
(84°F)		 34°C
(94°F)		 35°C
(96°F)		 34°C
(94°F)		 34°C
(93°F)		 33°C
(92°F)		 31°C
(88°F)		 25°C
(78°F)		 17°C
(64°F)
Mean maximum 13°C
(55°F)		 16°C
(60°F)		 21°C
(69°F)		 27°C
(80°F)		 31°C
(89°F)		 33°C
(92°F)		 33°C
(91°F)		 33°C
(91°F)		 32°C
(90°F)		 29°C
(85°F)		 18°C
(65°F)		 16°C
(60°F)
Average high 1°C
(34°F)		 3°C
(37°F)		 10°C
(50°F)		 15°C
(59°F)		 22°C
(71°F)		 27°C
(81°F)		 29°C
(84°F)		 28°C
(82°F)		 26°C
(78°F)		 18°C
(65°F)		 9°C
(48°F)		 5°C
(42°F)
Daily mean -2°C
(28°F)		 -1°C
(30°F)		 5°C
(40°F)		 10°C
(50°F)		 17°C
(62°F)		 23°C
(73°F)		 24°C
(76°F)		 23°C
(73°F)		 20°C
(68°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(34°F)
Average low -6°C
(22°F)		 -6°C
(22°F)		 -0°C
(32°F)		 5°C
(41°F)		 12°C
(53°F)		 18°C
(64°F)		 20°C
(68°F)		 18°C
(64°F)		 15°C
(59°F)		 9°C
(48°F)		 1°C
(33°F)		 -3°C
(28°F)
Mean minimum -20°C
(-4°F)		 -18°C
(-1°F)		 -10°C
(15°F)		 -4°C
(25°F)		 2°C
(37°F)		 12°C
(54°F)		 14°C
(57°F)		 12°C
(54°F)		 7°C
(45°F)		 0°C
(33°F)		 -7°C
(19°F)		 -12°C
(10°F)
Minimum -29°C
(-20°F)		 -29°C
(-20°F)		 -16°C
(3°F)		 -7°C
(19°F)		 -2°C
(29°F)		 9°C
(49°F)		 13°C
(56°F)		 10°C
(51°F)		 4°C
(40°F)		 -1°C
(30°F)		 -14°C
(6°F)		 -22°C
(-7°F)

Compare climate in Knox with other places

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

Monthly average precipitation in Knox, Indiana, United States §

Knox usually has the most precipitation in May, June and October, with an average of 13 rainy days and 136 mm (5.4 inches) of precipitation per month.The driest months in Knox are January, September and December. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Knox, Indiana, 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) 73 (2.9) 75 (2.9) 101 (4.0) 106 (4.2) 163 (6.4) 124 (4.9) 116 (4.6) 104 (4.1) 72 (2.8) 122 (4.8) 76 (3.0) 61 (2.4)
Average precipitation days (≥ 1 mm) 8 11 12 13 15 13 11 12 8 13 9 8

Monthly sunshine hours in Knox, Indiana, United States §

The sunniest months in Knox are June, July and August, when the sun shines an average of 11 hours 0 minutes a day.Least sunny months in Knox: January, February and December receive an average of 4 hours 50 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Knox, Indiana, 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 109 166 227 237 279 330 350 331 285 223 178 163
Mean daily daylight hours 9h 34m 10h 37m 11h 58m 13h 20m 14h 30m 15h 5m 14h 46m 13h 44m 12h 24m 11h 2m 9h 51m 9h 14m

Solar UV radiation in Knox, Indiana, United States §

Knox experiences the highest level of ultraviolet (UV) radiation in April, June and July, 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 Knox UV Index data.

Average daily maximum UV levels by month for Knox, Indiana, 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 9 9 10 10 9 8 6 4 2