Yankton Weather in December
Average highs run from 40°F on December 1 to 30°F on December 31, and lows from 19°F to 12°F. Normal precipitation for the month is 1.03 in over about 5 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 34°F
- Average low
- 15°F
- Precipitation
- 1.03 in
- Snowfall
- 7.6 in
- Record high
- 67°FDec 6, 1939
- Record low
- -18°FDec 12, 1932
- Chance of a freeze
- 100%
- Daylight
- 9 h 15 min to 9 h 05 min
- Cloud cover
- 63%
- Humidity
- 81%
- Dew point
- 19°F
- Wind
- 11.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 40°F | 19°F | 66°F 2021 | -2°F 1944 | 17% | 9% |
| Dec 2 | 39°F | 19°F | 62°F 1941 | -5°F 1942 | 17% | 9% |
| Dec 3 | 39°F | 19°F | 66°F 1941 | -6°F 1942 | 17% | 10% |
| Dec 4 | 38°F | 18°F | 56°F 1943 | -4°F 2025 | 17% | 10% |
| Dec 5 | 38°F | 18°F | 65°F 1939 | -2°F 1937 | 17% | 10% |
| Dec 6 | 37°F | 18°F | 67°F 1939 | -6°F 1936 | 17% | 10% |
| Dec 7 | 37°F | 17°F | 60°F 2023 | -7°F 1936 | 17% | 10% |
| Dec 8 | 36°F | 17°F | 62°F 2024 | -6°F 1932 | 17% | 10% |
| Dec 9 | 36°F | 17°F | 67°F 1939 | -8°F 1932 | 17% | 11% |
| Dec 10 | 36°F | 16°F | 53°F 1946 | -7°F 1937 | 17% | 11% |
| Dec 11 | 35°F | 16°F | 65°F 1939 | -10°F 1932 | 17% | 11% |
| Dec 12 | 35°F | 16°F | 50°F 1939 | -18°F 1932 | 17% | 11% |
| Dec 13 | 35°F | 15°F | 52°F 2017 | -6°F 2025 | 17% | 11% |
| Dec 14 | 34°F | 15°F | 53°F 1939 | -13°F 2025 | 17% | 11% |
| Dec 15 | 34°F | 15°F | 61°F 1939 | -11°F 1932 | 17% | 11% |
| Dec 16 | 34°F | 15°F | 64°F 1939 | -11°F 1932 | 17% | 11% |
| Dec 17 | 33°F | 14°F | 66°F 1939 | -7°F 1945 | 17% | 11% |
| Dec 18 | 33°F | 14°F | 57°F 1943 | -10°F 1945 | 16% | 11% |
| Dec 19 | 33°F | 14°F | 54°F 1941 | -8°F 1945 | 16% | 11% |
| Dec 20 | 32°F | 14°F | 65°F 1933 | -5°F 2022 | 16% | 11% |
| Dec 21 | 32°F | 13°F | 59°F 1941 | -8°F 2022 | 16% | 12% |
| Dec 22 | 32°F | 13°F | 58°F 2020 | -18°F 2022 | 16% | 12% |
| Dec 23 | 32°F | 13°F | 58°F 1936 | -11°F 2022 | 16% | 12% |
| Dec 24 | 31°F | 13°F | 56°F 2025 | -8°F 1943 | 16% | 12% |
| Dec 25 | 31°F | 13°F | 55°F 1938 | -7°F 2022 | 16% | 12% |
| Dec 26 | 31°F | 12°F | 46°F 1932 | -10°F 1933 | 16% | 12% |
| Dec 27 | 31°F | 12°F | 59°F 2025 | -11°F 2017 | 16% | 12% |
| Dec 28 | 31°F | 12°F | 54°F 2024 | -5°F 1933 | 16% | 12% |
| Dec 29 | 31°F | 12°F | 51°F 2024 | -12°F 1946 | 16% | 12% |
| Dec 30 | 30°F | 12°F | 45°F 2025 | -12°F 1946 | 16% | 12% |
| Dec 31 | 30°F | 12°F | 51°F 2025 | -18°F 2017 | 16% | 12% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:41 AM, sunset 4:56 PM
- December 31
- sunrise 8:00 AM, sunset 5:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094911 (Yankton 2 E), public domain. Records: NOAA GHCN-Daily, station USW00094911, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.