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Monthly climate in Yankton, South Dakota, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Yankton features a humid continental climate (Dfa).Temperatures typically range between -5 °C (22 °F) and 25 °C (77 °F) through the year, but rarely can drop to -32 °C (-26 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 851 mm (33.5 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually.Yankton enjoys an average of 3137 hours of sunshine throughout the year, and daylight varies from 9 hours 3 minutes to 15 hours 16 minutes per day.

Monthly average temperatures in Yankton, South Dakota, United States §

The warmest months in Yankton are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (73 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -2 °C (22 - 28 °F) throughout the day. On average each year, Yankton experiences 92 days above 25 °C (77.0 °F) and 131 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Yankton, South Dakota, 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 14°C
(57°F)		 21°C
(70°F)		 26°C
(78°F)		 31°C
(89°F)		 34°C
(94°F)		 36°C
(98°F)		 37°C
(99°F)		 36°C
(97°F)		 34°C
(94°F)		 31°C
(87°F)		 26°C
(80°F)		 18°C
(65°F)
Mean maximum 10°C
(50°F)		 15°C
(58°F)		 22°C
(71°F)		 28°C
(82°F)		 31°C
(88°F)		 33°C
(92°F)		 35°C
(96°F)		 33°C
(91°F)		 33°C
(92°F)		 29°C
(84°F)		 20°C
(69°F)		 13°C
(56°F)
Average high -1°C
(31°F)		 0°C
(32°F)		 8°C
(47°F)		 14°C
(58°F)		 21°C
(69°F)		 29°C
(84°F)		 30°C
(86°F)		 28°C
(83°F)		 25°C
(78°F)		 15°C
(60°F)		 9°C
(48°F)		 3°C
(37°F)
Daily mean -5°C
(23°F)		 -5°C
(22°F)		 3°C
(38°F)		 8°C
(46°F)		 15°C
(60°F)		 23°C
(74°F)		 25°C
(77°F)		 23°C
(73°F)		 20°C
(67°F)		 10°C
(50°F)		 3°C
(38°F)		 -2°C
(28°F)
Average low -10°C
(15°F)		 -11°C
(13°F)		 -2°C
(29°F)		 2°C
(36°F)		 10°C
(51°F)		 18°C
(64°F)		 20°C
(68°F)		 18°C
(64°F)		 14°C
(57°F)		 5°C
(41°F)		 -2°C
(28°F)		 -7°C
(20°F)
Mean minimum -23°C
(-9°F)		 -23°C
(-9°F)		 -13°C
(9°F)		 -8°C
(19°F)		 2°C
(36°F)		 12°C
(53°F)		 14°C
(58°F)		 11°C
(53°F)		 6°C
(43°F)		 -6°C
(22°F)		 -11°C
(12°F)		 -19°C
(-1°F)
Minimum -31°C
(-24°F)		 -32°C
(-26°F)		 -23°C
(-9°F)		 -15°C
(5°F)		 -0°C
(32°F)		 9°C
(49°F)		 12°C
(53°F)		 10°C
(50°F)		 5°C
(42°F)		 -11°C
(13°F)		 -14°C
(6°F)		 -25°C
(-13°F)

Compare climate in Yankton with other places

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

Monthly average precipitation in Yankton, South Dakota, United States §

Yankton usually has the most precipitation in May, June and August, with an average of 10 rainy days and 113 mm (4.5 inches) of precipitation per month.The driest months in Yankton are January, February and November. On average, 24 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Yankton, South Dakota, 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) 24 (0.9) 25 (1.0) 77 (3.0) 80 (3.1) 154 (6.1) 90 (3.5) 88 (3.5) 95 (3.8) 77 (3.0) 76 (3.0) 22 (0.9) 43 (1.7)
Average precipitation days (≥ 1 mm) 4 6 8 11 14 9 8 9 8 8 5 4

Monthly sunshine hours in Yankton, South Dakota, United States §

The sunniest months in Yankton are June, July and August, when the sun shines an average of 11 hours 31 minutes a day.Least sunny months in Yankton: January, February and December receive an average of 6 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Yankton, South Dakota, 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 156 208 231 264 281 355 372 331 269 234 222 207
Mean daily daylight hours 9h 25m 10h 32m 11h 58m 13h 25m 14h 39m 15h 16m 14h 56m 13h 50m 12h 26m 10h 59m 9h 42m 9h 3m

Solar UV radiation in Yankton, South Dakota, United States §

Yankton experiences the highest level of ultraviolet (UV) radiation in June, 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 Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Yankton UV Index data.

Average daily maximum UV levels by month for Yankton, South Dakota, 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 11 10 10 8 5 3 2