Longmont weather in April: Longmont, Colorado: normal highs, lows, rain and records for April
Longmont in April has a normal high of 63°F and a normal low of 32°F, a daily mean of 48°F, rising from 61°F on the 1st to 67°F by the 30th. Measurable precipitation falls on 8 days in a normal April, 2.04 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 0°C, 52 mm of precipitation in April.
- 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 April?
The normal high is 63°F and the normal low 32°F, for a daily mean of 47.8°F. April is 6.3°F warmer than March and 9.3°F cooler than May. April is the 7th warmest month of the year in Longmont and the wettest. Across the month the normal high rises 6°F, from 61°F on April 1 to 67°F on April 30. From one year to the next April's mean temperature typically moves about 3.0°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 45°F and 51°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 |
|---|---|---|---|---|
| April 1 | 61°F | 30°F | 20% | 14% |
| April 8 | 62°F | 31°F | 22% | 15% |
| April 15 | 63°F | 32°F | 24% | 17% |
| April 22 | 64°F | 33°F | 26% | 18% |
| April 30 | 67°F | 36°F | 28% | 18% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 61°F | 30°F | 20% | 14% | 12 h 40 min |
| April 2 | 61°F | 30°F | 20% | 14% | 12 h 40 min |
| April 3 | 61°F | 30°F | 21% | 14% | 12 h 40 min |
| April 4 | 61°F | 30°F | 21% | 14% | 12 h 50 min |
| April 5 | 61°F | 31°F | 21% | 15% | 12 h 50 min |
| April 6 | 61°F | 31°F | 22% | 15% | 12 h 50 min |
| April 7 | 62°F | 31°F | 22% | 15% | 12 h 50 min |
| April 8 | 62°F | 31°F | 22% | 15% | 13 h |
| April 9 | 62°F | 31°F | 23% | 16% | 13 h |
| April 10 | 62°F | 31°F | 23% | 16% | 13 h |
| April 11 | 62°F | 31°F | 23% | 16% | 13 h |
| April 12 | 62°F | 31°F | 24% | 16% | 13 h 10 min |
| April 13 | 62°F | 32°F | 24% | 17% | 13 h 10 min |
| April 14 | 63°F | 32°F | 24% | 17% | 13 h 10 min |
| April 15 | 63°F | 32°F | 24% | 17% | 13 h 10 min |
| April 16 | 63°F | 32°F | 25% | 17% | 13 h 20 min |
| April 17 | 63°F | 32°F | 25% | 17% | 13 h 20 min |
| April 18 | 63°F | 33°F | 25% | 17% | 13 h 20 min |
| April 19 | 64°F | 33°F | 25% | 17% | 13 h 20 min |
| April 20 | 64°F | 33°F | 26% | 18% | 13 h 30 min |
| April 21 | 64°F | 33°F | 26% | 18% | 13 h 30 min |
| April 22 | 64°F | 33°F | 26% | 18% | 13 h 30 min |
| April 23 | 65°F | 34°F | 26% | 18% | 13 h 30 min |
| April 24 | 65°F | 34°F | 26% | 18% | 13 h 40 min |
| April 25 | 65°F | 34°F | 27% | 18% | 13 h 40 min |
| April 26 | 65°F | 34°F | 27% | 18% | 13 h 40 min |
| April 27 | 66°F | 35°F | 27% | 18% | 13 h 40 min |
| April 28 | 66°F | 35°F | 27% | 18% | 13 h 50 min |
| April 29 | 66°F | 35°F | 27% | 18% | 13 h 50 min |
| April 30 | 67°F | 36°F | 28% | 18% | 13 h 50 min |
- Normal high
- 63°FApril average
- Normal low
- 32°FApril average
- Precipitation
- 2.04 inmonth total
- Days with precipitation
- 80.01 inch or more
- Nights at 32°F or colder
- 16
- Daylight
- 12 h 40 min to 13 h 50 minApril 1 to April 30
- Days at 70°F or more
- 11
- Days at 80°F or more
- 3
- Sunshine
- 71%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 April?
On a given April day the chance of 0.01 inch or more is 24% on average, highest around April 30 (28%). In all, 2.04 in falls on 8 days of a normal April, 1 of them with an inch or more.
In a normal April in Longmont, 16 nights fall to freezing and 1 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00055116.
What are the records for April in Longmont?
The warmest April temperature on this station's record (since 1893) is 91°F, on April 23, 2022; the coldest is −7°F, on April 2, 1975. The wettest April brought 5.20 in (1920); the snowiest, 51.0 inches (1920).
The April mean against the 1991-2020 normal of 47.8°F: 2021 46.0°F (−1.8), 2022 49.2°F (+1.4), 2023 48.2°F (+0.4), 2024 51.4°F (+3.6), 2025 50.7°F (+2.9), 2026 52.6°F (+4.8). 5 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.0°F | −1.8°F | 2.31 in |
| 2022 | 49.2°F | +1.4°F | 0.07 in |
| 2023 | 48.2°F | +0.4°F | 1.43 in |
| 2024 | 51.4°F | +3.6°F | 3.19 in |
| 2025 | 50.7°F | +2.9°F | 0.75 in |
| 2026 | 52.6°F | +4.8°F | 0.31 in |
Source: records: ACIS, station USC00055116; recent months: ACIS, station USC00055116. Records and recent months use complete months only.
How does April in Longmont compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, April normal highs run from 43°F in Leadville to 71°F in Rocky Ford; Longmont's is 63°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.