Twin Falls weather in January: Twin Falls, Idaho: normal highs, lows, rain and records for January
Twin Falls in January has a normal high of 37°F and a normal low of 21°F, a daily mean of 29°F, rising from 36°F on the 1st to 38°F by the 31st. Measurable precipitation falls on 8 days in a normal January, 0.95 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 3°C and low of −6°C, 24 mm of precipitation in January.
- NOAA stationTwin Falls Sun Valley Regional Airport
- Station IDUSW00094178
- Location42.48°N 114.49°W
- Elevation4,151 ft (1,265 m)
- Population55,589
- Jan 37° 21°
- Feb 42° 24°
- Mar 52° 30°
- Apr 59° 34°
- May 69° 42°
- Jun 78° 49°
- Jul 88° 58°
- Aug 87° 56°
- Sep 76° 47°
- Oct 62° 36°
- Nov 47° 26°
- Dec 37° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Twin Falls in January?
The normal high is 37°F and the normal low 21°F, for a daily mean of 29.1°F. January is 0.6°F warmer than December and 3.7°F cooler than February. January is the 11th warmest month of the year in Twin Falls and the 6th wettest. Across the month the normal high rises 2°F, from 36°F on January 1 to 38°F on January 31. From one year to the next January's mean temperature typically moves about 4.5°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 25°F and 34°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 28%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 36°F | 20°F | 28% | 11% |
| January 8 | 37°F | 21°F | 27% | 11% |
| January 15 | 37°F | 21°F | 26% | 10% |
| January 22 | 37°F | 22°F | 26% | 10% |
| January 31 | 38°F | 22°F | 26% | 10% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 31, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 36°F | 20°F | 28% | 11% | 9 h 10 min |
| January 2 | 36°F | 20°F | 28% | 11% | 9 h 10 min |
| January 3 | 36°F | 20°F | 28% | 11% | 9 h 10 min |
| January 4 | 37°F | 20°F | 28% | 11% | 9 h 10 min |
| January 5 | 37°F | 20°F | 28% | 11% | 9 h 10 min |
| January 6 | 37°F | 21°F | 27% | 11% | 9 h 10 min |
| January 7 | 37°F | 21°F | 27% | 11% | 9 h 10 min |
| January 8 | 37°F | 21°F | 27% | 11% | 9 h 10 min |
| January 9 | 37°F | 21°F | 27% | 11% | 9 h 10 min |
| January 10 | 37°F | 21°F | 27% | 10% | 9 h 20 min |
| January 11 | 37°F | 21°F | 27% | 10% | 9 h 20 min |
| January 12 | 37°F | 21°F | 26% | 10% | 9 h 20 min |
| January 13 | 37°F | 21°F | 26% | 10% | 9 h 20 min |
| January 14 | 37°F | 21°F | 26% | 10% | 9 h 20 min |
| January 15 | 37°F | 21°F | 26% | 10% | 9 h 20 min |
| January 16 | 37°F | 21°F | 26% | 10% | 9 h 20 min |
| January 17 | 37°F | 21°F | 26% | 10% | 9 h 30 min |
| January 18 | 37°F | 21°F | 26% | 10% | 9 h 30 min |
| January 19 | 37°F | 21°F | 26% | 10% | 9 h 30 min |
| January 20 | 37°F | 21°F | 26% | 10% | 9 h 30 min |
| January 21 | 37°F | 21°F | 26% | 10% | 9 h 30 min |
| January 22 | 37°F | 22°F | 26% | 10% | 9 h 40 min |
| January 23 | 37°F | 22°F | 26% | 10% | 9 h 40 min |
| January 24 | 37°F | 22°F | 26% | 10% | 9 h 40 min |
| January 25 | 37°F | 22°F | 26% | 10% | 9 h 40 min |
| January 26 | 37°F | 22°F | 26% | 10% | 9 h 40 min |
| January 27 | 38°F | 22°F | 26% | 10% | 9 h 50 min |
| January 28 | 38°F | 22°F | 26% | 10% | 9 h 50 min |
| January 29 | 38°F | 22°F | 26% | 10% | 9 h 50 min |
| January 30 | 38°F | 22°F | 26% | 10% | 9 h 50 min |
| January 31 | 38°F | 22°F | 26% | 10% | 9 h 50 min |
- Normal high
- 37°FJanuary average
- Normal low
- 21°FJanuary average
- Precipitation
- 0.95 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 28
- Daylight
- 9 h 10 min to 9 h 50 minJanuary 1 to January 31
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094178; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Twin Falls in January?
On a given January day the chance of 0.01 inch or more is 26% on average, highest around January 1 (28%). In all, 0.95 in falls on 8 days of a normal January.
In a normal January in Twin Falls, 28 nights fall to freezing and 8 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094178.
What are the records for January in Twin Falls?
The warmest January temperature on this station's record (since 1997) is 61°F, on January 31, 2003; the coldest is −15°F, on January 1, 2016. The wettest January brought 2.10 in (2012).
The January mean against the 1991-2020 normal of 29.1°F: 2021 31.8°F (+2.7), 2022 23.2°F (−5.9), 2023 28.8°F (−0.3), 2025 28.4°F (−0.7), 2026 32.3°F (+3.2). 2 of 5 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 31.8°F | +2.7°F | 0.48 in |
| 2022 | 23.2°F | −5.9°F | 0.71 in |
| 2023 | 28.8°F | −0.3°F | 0.78 in |
| 2025 | 28.4°F | −0.7°F | 0.21 in |
| 2026 | 32.3°F | +3.2°F | 0.53 in |
Source: records: ACIS, station USW00094178; recent months: ACIS, station USW00094178. Records and recent months use complete months only.
How does January in Twin Falls compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, January normal highs run from 27°F in Island Park to 44°F in Glenns Ferry; Twin Falls's is 37°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.