Longmont weather in March: Longmont, Colorado: normal highs, lows, rain and records for March
Longmont in March has a normal high of 57°F and a normal low of 26°F, a daily mean of 42°F, rising from 51°F on the 1st to 61°F by the 31st. Measurable precipitation falls on 5 days in a normal March, 1.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 14°C and low of −3°C, 30 mm of precipitation in March.
- 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 March?
The normal high is 57°F and the normal low 26°F, for a daily mean of 41.5°F. March is 9.5°F warmer than February and 6.3°F cooler than April. March is the 8th warmest month of the year in Longmont and the 7th wettest. Across the month the normal high rises 10°F, from 51°F on March 1 to 61°F on March 31. From one year to the next March's mean temperature typically moves about 3.9°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 38°F and 45°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 20%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 51°F | 21°F | 16% | 9% |
| March 8 | 54°F | 24°F | 16% | 9% |
| March 15 | 57°F | 26°F | 16% | 10% |
| March 22 | 59°F | 28°F | 17% | 11% |
| March 31 | 61°F | 30°F | 20% | 13% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 51°F | 21°F | 16% | 9% | 11 h 20 min |
| March 2 | 52°F | 21°F | 16% | 9% | 11 h 20 min |
| March 3 | 52°F | 22°F | 16% | 9% | 11 h 20 min |
| March 4 | 53°F | 22°F | 16% | 9% | 11 h 20 min |
| March 5 | 53°F | 23°F | 16% | 9% | 11 h 30 min |
| March 6 | 54°F | 23°F | 16% | 9% | 11 h 30 min |
| March 7 | 54°F | 23°F | 16% | 9% | 11 h 30 min |
| March 8 | 54°F | 24°F | 16% | 9% | 11 h 30 min |
| March 9 | 55°F | 24°F | 16% | 9% | 11 h 40 min |
| March 10 | 55°F | 25°F | 16% | 10% | 11 h 40 min |
| March 11 | 56°F | 25°F | 16% | 10% | 11 h 40 min |
| March 12 | 56°F | 25°F | 16% | 10% | 11 h 40 min |
| March 13 | 56°F | 26°F | 16% | 10% | 11 h 50 min |
| March 14 | 57°F | 26°F | 16% | 10% | 11 h 50 min |
| March 15 | 57°F | 26°F | 16% | 10% | 11 h 50 min |
| March 16 | 57°F | 27°F | 16% | 10% | 11 h 50 min |
| March 17 | 58°F | 27°F | 16% | 11% | 12 h |
| March 18 | 58°F | 27°F | 17% | 11% | 12 h |
| March 19 | 58°F | 27°F | 17% | 11% | 12 h |
| March 20 | 58°F | 28°F | 17% | 11% | 12 h 10 min |
| March 21 | 59°F | 28°F | 17% | 11% | 12 h 10 min |
| March 22 | 59°F | 28°F | 17% | 11% | 12 h 10 min |
| March 23 | 59°F | 28°F | 17% | 12% | 12 h 10 min |
| March 24 | 59°F | 29°F | 18% | 12% | 12 h 20 min |
| March 25 | 60°F | 29°F | 18% | 12% | 12 h 20 min |
| March 26 | 60°F | 29°F | 18% | 12% | 12 h 20 min |
| March 27 | 60°F | 29°F | 19% | 12% | 12 h 20 min |
| March 28 | 60°F | 29°F | 19% | 13% | 12 h 30 min |
| March 29 | 60°F | 30°F | 19% | 13% | 12 h 30 min |
| March 30 | 61°F | 30°F | 20% | 13% | 12 h 30 min |
| March 31 | 61°F | 30°F | 20% | 13% | 12 h 30 min |
- Normal high
- 57°FMarch average
- Normal low
- 26°FMarch average
- Precipitation
- 1.17 inmonth total
- Days with precipitation
- 50.01 inch or more
- Nights at 32°F or colder
- 27
- Daylight
- 11 h 20 min to 12 h 30 minMarch 1 to March 31
- Days at 70°F or more
- 5
- Sunshine
- 77%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 March?
On a given March day the chance of 0.01 inch or more is 17% on average, highest around March 31 (20%). In all, 1.17 in falls on 5 days of a normal March.
In a normal March in Longmont, 27 nights fall to freezing and 2 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00055116.
What are the records for March in Longmont?
The warmest March temperature on this station's record (since 1893) is 92°F, on March 26, 2026; the coldest is −26°F, on March 8, 1932. The wettest March brought 4.69 in (1983); the snowiest, 26.0 inches (1970).
The March mean against the 1991-2020 normal of 41.5°F: 2021 38.8°F (−2.7), 2022 39.2°F (−2.3), 2023 36.0°F (−5.5), 2024 41.7°F (+0.2), 2025 47.1°F (+5.6), 2026 53.1°F (+11.6). 3 of 6 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.8°F | −2.7°F | 3.39 in |
| 2022 | 39.2°F | −2.3°F | 0.90 in |
| 2023 | 36.0°F | −5.5°F | 0.51 in |
| 2024 | 41.7°F | +0.2°F | 2.33 in |
| 2025 | 47.1°F | +5.6°F | 1.82 in |
| 2026 | 53.1°F | +11.6°F | 0.34 in |
Source: records: ACIS, station USC00055116; recent months: ACIS, station USC00055116. Records and recent months use complete months only.
How does March in Longmont compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, March normal highs run from 37°F in Leadville to 63°F in Rocky Ford; Longmont's is 57°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.