Custer weather in January: Custer, South Dakota: normal highs, lows, rain and records for January
Custer in January has a normal high of 35°F and a normal low of 15°F, a daily mean of 25°F, holding near 35°F all month. Measurable precipitation falls on 5 days in a normal January, 0.41 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −9°C, 10 mm of precipitation in January.
- NOAA stationCuster County Airport
- Station IDUSW00094032
- Location43.73°N 103.61°W
- Elevation5,545 ft (1,690 m)
- Population1,829
- Jan 35° 15°
- Feb 35° 15°
- Mar 44° 22°
- Apr 50° 29°
- May 60° 38°
- Jun 71° 47°
- Jul 79° 54°
- Aug 78° 52°
- Sep 69° 43°
- Oct 54° 32°
- Nov 43° 22°
- Dec 35° 16°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Custer in January?
The normal high is 35°F and the normal low 15°F, for a daily mean of 25.1°F. January is 0.1°F cooler than December and 0.0°F cooler than February. January is the 11th warmest month of the year in Custer and the 12th wettest. Across the month the normal high falls 1°F, from 35°F on January 1 to 34°F on January 31. From one year to the next January's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 22°F and 28°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 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 35°F | 15°F | 18% | 5% |
| January 8 | 36°F | 15°F | 18% | 5% |
| January 15 | 36°F | 15°F | 18% | 5% |
| January 22 | 35°F | 15°F | 19% | 5% |
| January 31 | 34°F | 14°F | 22% | 6% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 7, coldest night January 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 35°F | 15°F | 18% | 5% | 9 h |
| January 2 | 35°F | 15°F | 18% | 5% | 9 h |
| January 3 | 35°F | 15°F | 18% | 5% | 9 h |
| January 4 | 36°F | 15°F | 18% | 5% | 9 h |
| January 5 | 36°F | 15°F | 18% | 5% | 9 h |
| January 6 | 36°F | 15°F | 17% | 5% | 9 h |
| January 7 | 36°F | 15°F | 18% | 5% | 9 h |
| January 8 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 9 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 10 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 11 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 12 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 13 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 14 | 36°F | 15°F | 18% | 5% | 9 h 10 min |
| January 15 | 36°F | 15°F | 18% | 5% | 9 h 20 min |
| January 16 | 36°F | 15°F | 18% | 5% | 9 h 20 min |
| January 17 | 36°F | 15°F | 18% | 5% | 9 h 20 min |
| January 18 | 35°F | 15°F | 19% | 5% | 9 h 20 min |
| January 19 | 35°F | 15°F | 19% | 5% | 9 h 20 min |
| January 20 | 35°F | 15°F | 19% | 5% | 9 h 20 min |
| January 21 | 35°F | 15°F | 19% | 5% | 9 h 30 min |
| January 22 | 35°F | 15°F | 19% | 5% | 9 h 30 min |
| January 23 | 35°F | 15°F | 20% | 5% | 9 h 30 min |
| January 24 | 35°F | 15°F | 20% | 5% | 9 h 30 min |
| January 25 | 35°F | 15°F | 20% | 5% | 9 h 30 min |
| January 26 | 35°F | 15°F | 20% | 5% | 9 h 40 min |
| January 27 | 35°F | 15°F | 21% | 6% | 9 h 40 min |
| January 28 | 34°F | 14°F | 21% | 6% | 9 h 40 min |
| January 29 | 34°F | 14°F | 21% | 6% | 9 h 40 min |
| January 30 | 34°F | 14°F | 21% | 6% | 9 h 50 min |
| January 31 | 34°F | 14°F | 22% | 6% | 9 h 50 min |
- Normal high
- 35°FJanuary average
- Normal low
- 15°FJanuary average
- Precipitation
- 0.41 inmonth total
- Days with precipitation
- 50.01 inch or more
- Nights at 32°F or colder
- 30
- Daylight
- 9 h to 9 h 50 minJanuary 1 to January 31
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094032; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Custer in January?
On a given January day the chance of 0.01 inch or more is 19% on average, highest around January 31 (22%). In all, 0.41 in falls on 5 days of a normal January.
In a normal January in Custer, 30 nights fall to freezing and 10 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094032.
How humid and windy is Custer in January?
At 3 p.m. the normal temperature is 32°F with 44% relative humidity and a dew point of 13°F; at 6 a.m. it is 21°F with 63% humidity. The wind averages 7.1 mph, most often from the west-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. | 21°F | 10°F | 63% | 6.0 mph | – |
| 9 a.m. | 26°F | 12°F | 55% | 6.7 mph | – |
| noon | 32°F | 12°F | 43% | 10.0 mph | – |
| 3 p.m. | 32°F | 13°F | 44% | 9.7 mph | – |
| 6 p.m. | 26°F | 12°F | 57% | 6.0 mph | – |
| 9 p.m. | 23°F | 12°F | 63% | 6.0 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094032. 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 Custer?
The warmest January temperature on this station's record (since 1999) is 65°F, on January 27, 2015; the coldest is −30°F, on January 14, 2024. The wettest January brought 0.99 in (2017).
The January mean against the 1991-2020 normal of 25.1°F: 2021 27.5°F (+2.4), 2022 26.2°F (+1.1), 2023 24.2°F (−0.9), 2024 22.4°F (−2.7), 2025 20.1°F (−5.0), 2026 26.6°F (+1.4). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 27.5°F | +2.4°F | 0.33 in |
| 2022 | 26.2°F | +1.1°F | 0.05 in |
| 2023 | 24.2°F | −0.9°F | 0.79 in |
| 2024 | 22.4°F | −2.7°F | 0.31 in |
| 2025 | 20.1°F | −5.0°F | 0.17 in |
| 2026 | 26.6°F | +1.4°F | 0.11 in |
Source: records: ACIS, station USW00094032; recent months: ACIS, station USW00094032. Records and recent months use complete months only.
How does January in Custer 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; Custer's is 35°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.