Casper weather in January: Casper, Wyoming: normal highs, lows, rain and records for January
Casper in January has a normal high of 35°F and a normal low of 15°F, a daily mean of 25°F, rising from 34°F on the 1st to 36°F by the 31st. Measurable precipitation falls on 6 days in a normal January, 0.49 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 2°C and low of −9°C, 12 mm of precipitation and 23 cm of snow in January.
- NOAA stationCasper-Natrona County Airport
- Station IDUSW00024089
- Location42.90°N 106.46°W
- Elevation5,338 ft (1,627 m)
- Population58,823
- Jan 35° 15°
- Feb 38° 15°
- Mar 49° 23°
- Apr 56° 28°
- May 67° 37°
- Jun 80° 45°
- Jul 89° 53°
- Aug 87° 51°
- Sep 76° 42°
- Oct 60° 31°
- Nov 46° 22°
- Dec 35° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Casper in January?
The normal high is 35°F and the normal low 15°F, for a daily mean of 25.1°F. January is 0.3°F warmer than December and 1.5°F cooler than February. January is the 11th warmest month of the year in Casper and the 12th wettest. Across the month the normal high rises 2°F, from 34°F on January 1 to 36°F on January 31. From one year to the next January's mean temperature typically moves about 3.3°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 | 34°F | 14°F | 21% | 6% |
| January 8 | 35°F | 15°F | 21% | 6% |
| January 15 | 35°F | 15°F | 21% | 6% |
| January 22 | 36°F | 15°F | 21% | 6% |
| January 31 | 36°F | 15°F | 22% | 6% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 20, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 34°F | 14°F | 21% | 6% | 9 h |
| January 2 | 34°F | 15°F | 21% | 6% | 9 h 10 min |
| January 3 | 34°F | 15°F | 21% | 6% | 9 h 10 min |
| January 4 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 5 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 6 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 7 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 8 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 9 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 10 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 11 | 35°F | 15°F | 21% | 6% | 9 h 10 min |
| January 12 | 35°F | 15°F | 21% | 6% | 9 h 20 min |
| January 13 | 35°F | 15°F | 21% | 6% | 9 h 20 min |
| January 14 | 35°F | 15°F | 21% | 6% | 9 h 20 min |
| January 15 | 35°F | 15°F | 21% | 6% | 9 h 20 min |
| January 16 | 36°F | 15°F | 21% | 6% | 9 h 20 min |
| January 17 | 36°F | 15°F | 21% | 6% | 9 h 20 min |
| January 18 | 36°F | 15°F | 21% | 6% | 9 h 30 min |
| January 19 | 36°F | 15°F | 21% | 6% | 9 h 30 min |
| January 20 | 36°F | 15°F | 21% | 6% | 9 h 30 min |
| January 21 | 36°F | 15°F | 21% | 6% | 9 h 30 min |
| January 22 | 36°F | 15°F | 21% | 6% | 9 h 30 min |
| January 23 | 36°F | 15°F | 21% | 6% | 9 h 40 min |
| January 24 | 36°F | 15°F | 21% | 6% | 9 h 40 min |
| January 25 | 36°F | 15°F | 21% | 6% | 9 h 40 min |
| January 26 | 36°F | 15°F | 21% | 6% | 9 h 40 min |
| January 27 | 36°F | 15°F | 22% | 6% | 9 h 40 min |
| January 28 | 36°F | 15°F | 22% | 6% | 9 h 50 min |
| January 29 | 36°F | 15°F | 22% | 6% | 9 h 50 min |
| January 30 | 36°F | 15°F | 22% | 6% | 9 h 50 min |
| January 31 | 36°F | 15°F | 22% | 6% | 9 h 50 min |
- Normal high
- 35°FJanuary average
- Normal low
- 15°FJanuary average
- Precipitation
- 0.49 inmonth total
- Days with precipitation
- 60.01 inch or more
- Snowfall
- 9.0 inmonth total
- Nights at 32°F or colder
- 29
- Daylight
- 9 h to 9 h 50 minJanuary 1 to January 31
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024089; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Casper in January?
On a given January day the chance of 0.01 inch or more is 21% on average, highest around January 31 (22%). In all, 0.49 in falls on 6 days of a normal January.
In a normal January in Casper, 29 nights fall to freezing, 11 days stay below freezing all day and snowfall averages 9.0 inches.
Snow falls on 6 days in a normal January, and an inch or more covers the ground on 17 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024089.
How humid and windy is Casper in January?
At 3 p.m. the normal temperature is 34°F with 51% relative humidity and a dew point of 18°F; at 6 a.m. it is 22°F with 67% humidity. The wind averages 14.3 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 22°F | 13°F | 67% | 13.2 mph | 68% |
| 9 a.m. | 25°F | 14°F | 63% | 14.9 mph | 65% |
| noon | 32°F | 17°F | 53% | 17.3 mph | 66% |
| 3 p.m. | 34°F | 18°F | 51% | 16.4 mph | 65% |
| 6 p.m. | 27°F | 17°F | 64% | 13.0 mph | 67% |
| 9 p.m. | 24°F | 15°F | 67% | 12.4 mph | 67% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024089. 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 Casper?
The warmest January temperature on Casper's official record (since 1939) is 60°F, on January 30, 1971; the coldest is −40°F, on January 24, 1949. The wettest January brought 1.99 in (2023); the snowiest, 39.3 inches (1949).
The January mean against the 1991-2020 normal of 25.1°F: 2021 25.4°F (+0.3), 2022 26.7°F (+1.6), 2023 20.9°F (−4.2), 2024 22.3°F (−2.8), 2025 18.2°F (−6.9), 2026 30.4°F (+5.3). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 25.4°F | +0.3°F | 0.48 in |
| 2022 | 26.7°F | +1.6°F | 0.90 in |
| 2023 | 20.9°F | −4.2°F | 1.99 in |
| 2024 | 22.3°F | −2.8°F | 0.36 in |
| 2025 | 18.2°F | −6.9°F | 0.48 in |
| 2026 | 30.4°F | +5.3°F | 0.19 in |
Source: records: ACIS, NWS threaded record CPRthr; recent months: ACIS, station USW00024089. Records and recent months use complete months only.
How does January in Casper compare across Wyoming?
Across the 71 places PlainClimate covers in Wyoming, January normal highs run from 25°F in Bondurant to 44°F in Yoder; Casper's is 35°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.