Sioux Falls weather in January: Sioux Falls, South Dakota: normal highs, lows, rain and records for January
Sioux Falls in January has a normal high of 27°F and a normal low of 9°F, a daily mean of 18°F, holding near 27°F all month. Measurable precipitation falls on 7 days in a normal January, 0.60 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of −3°C and low of −13°C, 15 mm of precipitation and 20 cm of snow in January.
- NOAA stationSioux Falls Foss Field
- Station IDUSW00014944
- Location43.59°N 96.73°W
- Elevation1,430 ft (436 m)
- From the center3 miles
- Population209,289
- Jan 27° 9°
- Feb 32° 13°
- Mar 45° 24°
- Apr 59° 36°
- May 71° 48°
- Jun 81° 59°
- Jul 85° 63°
- Aug 83° 61°
- Sep 76° 52°
- Oct 61° 38°
- Nov 45° 25°
- Dec 32° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sioux Falls in January?
The normal high is 27°F and the normal low 9°F, for a daily mean of 17.9°F. January is 4.6°F cooler than December and 4.4°F cooler than February. January is the 12th warmest month of the year in Sioux Falls and the 12th wettest. Across the month the normal high rises 1°F, from 27°F on January 1 to 28°F on January 31. From one year to the next January's mean temperature typically moves about 5.5°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 12°F and 23°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 23%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 27°F | 10°F | 22% | 7% |
| January 8 | 27°F | 9°F | 22% | 7% |
| January 15 | 27°F | 8°F | 23% | 7% |
| January 22 | 27°F | 8°F | 23% | 7% |
| January 31 | 28°F | 9°F | 23% | 7% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 19)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 27°F | 10°F | 22% | 7% | 9 h |
| January 2 | 27°F | 10°F | 22% | 7% | 9 h |
| January 3 | 27°F | 9°F | 22% | 7% | 9 h |
| January 4 | 27°F | 9°F | 22% | 7% | 9 h |
| January 5 | 27°F | 9°F | 22% | 7% | 9 h |
| January 6 | 27°F | 9°F | 22% | 7% | 9 h |
| January 7 | 27°F | 9°F | 22% | 7% | 9 h 10 min |
| January 8 | 27°F | 9°F | 22% | 7% | 9 h 10 min |
| January 9 | 27°F | 9°F | 22% | 7% | 9 h 10 min |
| January 10 | 27°F | 9°F | 22% | 7% | 9 h 10 min |
| January 11 | 27°F | 8°F | 22% | 7% | 9 h 10 min |
| January 12 | 27°F | 8°F | 22% | 7% | 9 h 10 min |
| January 13 | 27°F | 8°F | 23% | 7% | 9 h 10 min |
| January 14 | 27°F | 8°F | 23% | 7% | 9 h 10 min |
| January 15 | 27°F | 8°F | 23% | 7% | 9 h 20 min |
| January 16 | 27°F | 8°F | 23% | 7% | 9 h 20 min |
| January 17 | 27°F | 8°F | 23% | 7% | 9 h 20 min |
| January 18 | 27°F | 8°F | 23% | 7% | 9 h 20 min |
| January 19 | 27°F | 8°F | 23% | 7% | 9 h 20 min |
| January 20 | 27°F | 8°F | 23% | 7% | 9 h 30 min |
| January 21 | 27°F | 8°F | 23% | 7% | 9 h 30 min |
| January 22 | 27°F | 8°F | 23% | 7% | 9 h 30 min |
| January 23 | 27°F | 8°F | 23% | 7% | 9 h 30 min |
| January 24 | 27°F | 8°F | 23% | 7% | 9 h 30 min |
| January 25 | 28°F | 8°F | 23% | 7% | 9 h 40 min |
| January 26 | 28°F | 8°F | 23% | 7% | 9 h 40 min |
| January 27 | 28°F | 8°F | 23% | 7% | 9 h 40 min |
| January 28 | 28°F | 8°F | 23% | 7% | 9 h 40 min |
| January 29 | 28°F | 9°F | 23% | 7% | 9 h 40 min |
| January 30 | 28°F | 9°F | 23% | 7% | 9 h 50 min |
| January 31 | 28°F | 9°F | 23% | 7% | 9 h 50 min |
- Normal high
- 27°FJanuary average
- Normal low
- 9°FJanuary average
- Precipitation
- 0.60 inmonth total
- Days with precipitation
- 70.01 inch or more
- Snowfall
- 8.0 inmonth total
- Nights at 32°F or colder
- 31
- Daylight
- 9 h to 9 h 50 minJanuary 1 to January 31
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014944; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Sioux Falls in January?
On a given January day the chance of 0.01 inch or more is 23% on average, highest around January 30 (23%). In all, 0.60 in falls on 7 days of a normal January.
In a normal January in Sioux Falls, 31 nights fall to freezing, 20 days stay below freezing all day and snowfall averages 8.0 inches.
Snow falls on 7 days in a normal January, and an inch or more covers the ground on 22 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014944.
How humid and windy is Sioux Falls in January?
At 3 p.m. the normal temperature is 26°F with 67% relative humidity and a dew point of 16°F; at 6 a.m. it is 15°F with 82% humidity. The wind averages 9.8 mph, most often from the northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 15°F | 11°F | 82% | 8.7 mph | 45% |
| 9 a.m. | 16°F | 11°F | 81% | 9.1 mph | 47% |
| noon | 23°F | 15°F | 71% | 11.6 mph | 42% |
| 3 p.m. | 26°F | 16°F | 67% | 12.1 mph | 47% |
| 6 p.m. | 22°F | 15°F | 75% | 9.6 mph | 45% |
| 9 p.m. | 19°F | 14°F | 79% | 9.2 mph | 54% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014944. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for January in Sioux Falls?
The warmest January temperature on Sioux Falls's official record (since 1893) is 66°F, on January 24, 1981; the coldest is −38°F, on January 12, 1912. The wettest January brought 2.23 in (1922); the snowiest, 22.2 inches (1929).
The January mean against the 1991-2020 normal of 17.9°F: 2021 25.7°F (+7.8), 2022 18.1°F (+0.2), 2023 17.8°F (−0.1), 2024 18.2°F (+0.3), 2025 18.2°F (+0.3), 2026 17.3°F (−0.6). 4 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 25.7°F | +7.8°F | 0.97 in |
| 2022 | 18.1°F | +0.2°F | 0.29 in |
| 2023 | 17.8°F | −0.1°F | 1.90 in |
| 2024 | 18.2°F | +0.3°F | 1.16 in |
| 2025 | 18.2°F | +0.3°F | 0.07 in |
| 2026 | 17.3°F | −0.6°F | 0.17 in |
Source: records: ACIS, NWS threaded record FSDthr; recent months: ACIS, station USW00014944. Records and recent months use complete months only.
How does January in Sioux Falls compare across South Dakota?
Across the 100 places PlainClimate covers in South Dakota, January normal highs run from 20°F in Astoria to 41°F in Hill City; Sioux Falls's is 27°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Sioux Falls in December32°F by day, 13°F at night
- Sioux Falls in February32°F by day, 13°F at night
- Sioux Falls through the yearEvery month, frost dates, records and recent years
- South Dakota in JanuaryThe statewide normal and the warmest and coolest places
- Hill City: South Dakota's warmest Januarynormal high 41°F