Longmont weather in January: Longmont, Colorado: normal highs, lows, rain and records for January
Longmont in January has a normal high of 45°F and a normal low of 14°F, a daily mean of 29°F, holding near 45°F all month. Measurable precipitation falls on 4 days in a normal January, 0.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 7°C and low of −10°C, 14 mm of precipitation in January.
- NOAA stationLongmont (2 mi ESE)
- Station IDUSC00055116
- Location40.17°N 105.08°W
- Elevation4,950 ft (1,509 m)
- From the center1 miles
- Population99,818
- Jan 45° 14°
- Feb 47° 17°
- Mar 57° 26°
- Apr 63° 32°
- May 73° 41°
- Jun 84° 51°
- Jul 91° 55°
- Aug 88° 54°
- Sep 80° 46°
- Oct 66° 33°
- Nov 54° 24°
- Dec 45° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Longmont in January?
The normal high is 45°F and the normal low 14°F, for a daily mean of 29.4°F. January is 0.2°F cooler than December and 2.6°F cooler than February. January is the 12th warmest month of the year in Longmont and the 11th wettest. From one year to the next January's mean temperature typically moves about 4.4°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 15%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 44°F | 13°F | 10% | 4% |
| January 8 | 45°F | 14°F | 10% | 5% |
| January 15 | 45°F | 15°F | 12% | 6% |
| January 22 | 45°F | 15°F | 13% | 7% |
| January 31 | 44°F | 15°F | 15% | 7% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 13, coldest night January 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 44°F | 13°F | 10% | 4% | 9 h 20 min |
| January 2 | 44°F | 14°F | 10% | 4% | 9 h 20 min |
| January 3 | 44°F | 14°F | 10% | 4% | 9 h 20 min |
| January 4 | 44°F | 14°F | 10% | 4% | 9 h 20 min |
| January 5 | 44°F | 14°F | 10% | 4% | 9 h 20 min |
| January 6 | 45°F | 14°F | 10% | 5% | 9 h 30 min |
| January 7 | 45°F | 14°F | 10% | 5% | 9 h 30 min |
| January 8 | 45°F | 14°F | 10% | 5% | 9 h 30 min |
| January 9 | 45°F | 14°F | 10% | 5% | 9 h 30 min |
| January 10 | 45°F | 14°F | 11% | 5% | 9 h 30 min |
| January 11 | 45°F | 14°F | 11% | 5% | 9 h 30 min |
| January 12 | 45°F | 14°F | 11% | 5% | 9 h 30 min |
| January 13 | 45°F | 14°F | 11% | 5% | 9 h 30 min |
| January 14 | 45°F | 14°F | 11% | 5% | 9 h 30 min |
| January 15 | 45°F | 15°F | 12% | 6% | 9 h 40 min |
| January 16 | 45°F | 15°F | 12% | 6% | 9 h 40 min |
| January 17 | 45°F | 15°F | 12% | 6% | 9 h 40 min |
| January 18 | 45°F | 15°F | 12% | 6% | 9 h 40 min |
| January 19 | 45°F | 15°F | 13% | 6% | 9 h 40 min |
| January 20 | 45°F | 15°F | 13% | 6% | 9 h 40 min |
| January 21 | 45°F | 15°F | 13% | 6% | 9 h 50 min |
| January 22 | 45°F | 15°F | 13% | 7% | 9 h 50 min |
| January 23 | 45°F | 15°F | 14% | 7% | 9 h 50 min |
| January 24 | 45°F | 15°F | 14% | 7% | 9 h 50 min |
| January 25 | 44°F | 15°F | 14% | 7% | 9 h 50 min |
| January 26 | 44°F | 15°F | 14% | 7% | 10 h |
| January 27 | 44°F | 15°F | 14% | 7% | 10 h |
| January 28 | 44°F | 15°F | 15% | 7% | 10 h |
| January 29 | 44°F | 15°F | 15% | 7% | 10 h |
| January 30 | 44°F | 15°F | 15% | 7% | 10 h |
| January 31 | 44°F | 15°F | 15% | 7% | 10 h 10 min |
- Normal high
- 45°FJanuary average
- Normal low
- 14°FJanuary average
- Precipitation
- 0.56 inmonth total
- Days with precipitation
- 40.01 inch or more
- Nights at 32°F or colder
- 31
- Daylight
- 9 h 20 min to 10 h 10 minJanuary 1 to January 31
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00055116; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Longmont in January?
On a given January day the chance of 0.01 inch or more is 12% on average, highest around January 31 (15%). In all, 0.56 in falls on 4 days of a normal January.
In a normal January in Longmont, 31 nights fall to freezing and 5 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00055116.
What are the records for January in Longmont?
The warmest January temperature on this station's record (since 1893) is 75°F, on January 27, 1982; the coldest is −38°F, on January 16, 1930. The wettest January brought 1.35 in (1996); the snowiest, 18.0 inches (1962).
The January mean against the 1991-2020 normal of 29.4°F: 2021 31.4°F (+2.0), 2022 27.4°F (−2.0), 2023 26.6°F (−2.8), 2024 27.6°F (−1.8), 2025 23.7°F (−5.7), 2026 33.8°F (+4.4). 2 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 31.4°F | +2.0°F | 0.42 in |
| 2022 | 27.4°F | −2.0°F | 1.22 in |
| 2023 | 26.6°F | −2.8°F | 0.86 in |
| 2024 | 27.6°F | −1.8°F | 0.17 in |
| 2025 | 23.7°F | −5.7°F | 0.73 in |
| 2026 | 33.8°F | +4.4°F | 0.27 in |
Source: records: ACIS, station USC00055116; recent months: ACIS, station USC00055116. Records and recent months use complete months only.
How does January in Longmont compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, January normal highs run from 26°F in Crested Butte to 49°F in Cañon City; Longmont's is 45°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.