Sioux Falls Weather in December
In Sioux Falls, December brings very low daytime temperatures around -2°C (28°F), with nights cooling to -12°C (10°F). Some snowfall is to be expected.
Rainfall in Sioux Falls in December
Climate statistics over the past 30 years suggest around 8 days of snow, with 35 mm (1.4 in) average for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Sioux Falls in December
December in Sioux Falls brings very low temperatures, with highs of -2°C (28°F) and nights around -12°C (10°F). December marks the winter season. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. With lows of -12°C (10°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. Known for its cold temperatures, this month requires warm clothing. Ensure you dress appropriately to stay comfortable.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Sioux Falls. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Sioux Falls's climate page.
Sioux Falls Temperature in December
Min Temperature
-12°C (10°F)
Max Temperature
-2°C (28°F)
Chance of Rain
27%
Precipitation
35 mm (1.4 in)
Rainy days
8 days
Humidity
75%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sioux Falls typically drop from around 1°C (34°F) at the start of December to approximately -3°C (27°F) by the end. Nights are very cold, with lows typically ranging from -14°C (7°F) to -8°C (18°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Sioux Falls in December
Browse day-by-day weather records for Sioux Falls spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sioux Falls historical weather extremes in December
Based on weather observations in Sioux Falls between 1976 and 2025, these are the recorded extremes during December.
- The warmest day in December was on December 1, 1998, with a maximum of 17°C (63°F).
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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tolerable
unpleasant
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What to Wear in Sioux Falls in December
We recommend you pack up your warm winter gear for Sioux Falls in December. If you have insulated boots, thermal layers, and a heavy winter coat that can handle snow and freezing temperatures it's smart to bring them. Don't forget gloves, a warm hat, and a scarf. Some rain is possible, so pack something to handle light showers.What To Do in Sioux Falls in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Sioux Falls's climate page.
See the full Sioux Falls climate overview or explore weather in the United States of America.
