Idaho Falls weather in January: Idaho Falls, Idaho: normal highs, lows, rain and records for January
Idaho Falls in January has a normal high of 29°F and a normal low of 12°F, a daily mean of 20°F, rising from 28°F on the 1st to 30°F by the 31st. Measurable precipitation falls on 8 days in a normal January, 0.67 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of −2°C and low of −11°C, 17 mm of precipitation in January.
- NOAA stationIdaho Falls Fanning Field
- Station IDUSW00024145
- Location43.52°N 112.07°W
- Elevation4,729 ft (1,441 m)
- Population69,523
- Jan 29° 12°
- Feb 34° 16°
- Mar 47° 25°
- Apr 58° 31°
- May 67° 38°
- Jun 76° 45°
- Jul 87° 49°
- Aug 86° 48°
- Sep 75° 41°
- Oct 59° 31°
- Nov 43° 22°
- Dec 30° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Idaho Falls in January?
The normal high is 29°F and the normal low 12°F, for a daily mean of 20.4°F. January is 1.5°F cooler than December and 4.5°F cooler than February. January is the 12th warmest month of the year in Idaho Falls and the 8th wettest. Across the month the normal high rises 2°F, from 28°F on January 1 to 30°F on January 31. From one year to the next January's mean temperature typically moves about 5.3°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 15°F and 26°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 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 28°F | 11°F | 29% | 8% |
| January 8 | 28°F | 12°F | 28% | 8% |
| January 15 | 29°F | 12°F | 27% | 8% |
| January 22 | 29°F | 13°F | 26% | 7% |
| January 31 | 30°F | 13°F | 25% | 7% |
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 | 28°F | 11°F | 29% | 8% | 9 h |
| January 2 | 28°F | 11°F | 29% | 8% | 9 h |
| January 3 | 28°F | 11°F | 29% | 8% | 9 h |
| January 4 | 28°F | 11°F | 29% | 8% | 9 h |
| January 5 | 28°F | 11°F | 29% | 8% | 9 h |
| January 6 | 28°F | 11°F | 28% | 8% | 9 h |
| January 7 | 28°F | 12°F | 28% | 8% | 9 h 10 min |
| January 8 | 28°F | 12°F | 28% | 8% | 9 h 10 min |
| January 9 | 28°F | 12°F | 28% | 8% | 9 h 10 min |
| January 10 | 28°F | 12°F | 28% | 8% | 9 h 10 min |
| January 11 | 28°F | 12°F | 27% | 8% | 9 h 10 min |
| January 12 | 28°F | 12°F | 27% | 8% | 9 h 10 min |
| January 13 | 28°F | 12°F | 27% | 8% | 9 h 10 min |
| January 14 | 28°F | 12°F | 27% | 8% | 9 h 20 min |
| January 15 | 29°F | 12°F | 27% | 8% | 9 h 20 min |
| January 16 | 29°F | 12°F | 27% | 7% | 9 h 20 min |
| January 17 | 29°F | 12°F | 26% | 7% | 9 h 20 min |
| January 18 | 29°F | 12°F | 26% | 7% | 9 h 20 min |
| January 19 | 29°F | 12°F | 26% | 7% | 9 h 20 min |
| January 20 | 29°F | 12°F | 26% | 7% | 9 h 30 min |
| January 21 | 29°F | 12°F | 26% | 7% | 9 h 30 min |
| January 22 | 29°F | 13°F | 26% | 7% | 9 h 30 min |
| January 23 | 29°F | 13°F | 26% | 7% | 9 h 30 min |
| January 24 | 29°F | 13°F | 25% | 7% | 9 h 30 min |
| January 25 | 29°F | 13°F | 25% | 7% | 9 h 40 min |
| January 26 | 30°F | 13°F | 25% | 7% | 9 h 40 min |
| January 27 | 30°F | 13°F | 25% | 7% | 9 h 40 min |
| January 28 | 30°F | 13°F | 25% | 7% | 9 h 40 min |
| January 29 | 30°F | 13°F | 25% | 7% | 9 h 50 min |
| January 30 | 30°F | 13°F | 25% | 7% | 9 h 50 min |
| January 31 | 30°F | 13°F | 25% | 7% | 9 h 50 min |
- Normal high
- 29°FJanuary average
- Normal low
- 12°FJanuary average
- Precipitation
- 0.67 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 30
- Daylight
- 9 h to 9 h 50 minJanuary 1 to January 31
- Sunshine
- 65%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024145; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Idaho Falls in January?
On a given January day the chance of 0.01 inch or more is 27% on average, highest around January 1 (29%). In all, 0.67 in falls on 8 days of a normal January.
In a normal January in Idaho Falls, 30 nights fall to freezing and 20 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024145.
What are the records for January in Idaho Falls?
The warmest January temperature on this station's record (since 1948) is 57°F, on January 31, 2003; the coldest is −33°F, on January 12, 1963. The wettest January brought 2.41 in (1969); the snowiest, 18.3 inches (1979).
The January mean against the 1991-2020 normal of 20.4°F: 2021 21.5°F (+1.1), 2022 16.4°F (−3.9), 2023 17.3°F (−3.1), 2024 24.9°F (+4.5), 2025 14.7°F (−5.7), 2026 27.5°F (+7.1). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 21.5°F | +1.1°F | 0.39 in |
| 2022 | 16.4°F | −3.9°F | 0.22 in |
| 2023 | 17.3°F | −3.1°F | 0.97 in |
| 2024 | 24.9°F | +4.5°F | 0.52 in |
| 2025 | 14.7°F | −5.7°F | 0.25 in |
| 2026 | 27.5°F | +7.1°F | 0.58 in |
Source: records: ACIS, station USW00024145; recent months: ACIS, station USW00024145. Records and recent months use complete months only.
How does January in Idaho 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; Idaho Falls's is 29°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Idaho Falls in December30°F by day, 13°F at night
- Idaho Falls in February34°F by day, 16°F at night
- Idaho Falls through the yearEvery month, frost dates, records and recent years
- Idaho in JanuaryThe statewide normal and the warmest and coolest places
- Glenns Ferry: Idaho's warmest Januarynormal high 44°F