Climate averages 1991–2020
Longmont weather
in February.
A cold, fairly dry month: the 10th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
February is a cold month in Longmont: daytime highs average 5.9°C and nights cool to about -7.6°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 20 mm of rain on roughly 5 days, which makes February a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 39 min on an average February day.
The nearest other city in this atlas is Boulder (22 km away). In February its highs average 5.4°C, 0.6°C cooler than Longmont, with 26 mm of rain.
Among the 498 cities listed in the United States, Longmont ranks joint 343rd of 498 for the warmest February highs and joint 17th of 498 for the driest February (rainfall, lowest first). The mean February high of those 498 cities is 11.1°C; Longmont is 5.2°C cooler than that mean.
From February to March, average highs rise by 5.1°C to 11.0°C, and monthly rainfall rises from 20 mm to 42 mm.
The annual picture
February in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Longmont climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.5°C-8.4°C | -8.4°C | 19 | 4.7 | 9.710 h |
| February, selected | 5.9°C-7.6°C | -7.6°C | 20 | 5.3 | 10.611 h |
| March | 11.0°C-3.9°C | -3.9°C | 42 | 7.3 | 11.912 h |
| April | 14.8°C0.4°C | 0.4°C | 67 | 9.5 | 13.213 h |
| May | 19.9°C5.9°C | 5.9°C | 87 | 11.7 | 14.414 h |
| June | 26.0°C11.4°C | 11.4°C | 53 | 8.4 | 15.015 h |
| July | 29.5°C15.0°C | 15.0°C | 42 | 7.3 | 14.715 h |
| August | 28.3°C14.3°C | 14.3°C | 39 | 6.7 | 13.814 h |
| September | 24.2°C9.9°C | 9.9°C | 39 | 5.9 | 12.512 h |
| October | 16.8°C3.2°C | 3.2°C | 41 | 6.5 | 11.211 h |
| November | 9.4°C-3.6°C | -3.6°C | 28 | 5.8 | 10.010 h |
| December | 4.2°C-8.1°C | -8.1°C | 18 | 4.5 | 9.49 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
February in nearby cities
- Boulder in FebruaryUnited States · 22 kmHigh 5.4°C · Low -8.3°C · 26 mm rain
- Loveland in FebruaryUnited States · 26 kmHigh 5.9°C · Low -7.8°C · 18 mm rain
- Thornton in FebruaryUnited States · 35 kmHigh 5.7°C · Low -8.7°C · 23 mm rain
- Westminster (Colorado), United States in FebruaryUnited States · 37 kmHigh 5.9°C · Low -8.8°C · 23 mm rain
- Arvada in FebruaryUnited States · 41 kmHigh 5.9°C · Low -8.8°C · 23 mm rain
- Greeley in FebruaryUnited States · 44 kmHigh 7.4°C · Low -6.3°C · 11 mm rain
- Fort Collins in FebruaryUnited States · 47 kmHigh 5.7°C · Low -7.5°C · 18 mm rain
- Denver in FebruaryUnited States · 49 kmHigh 6.0°C · Low -8.7°C · 23 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Longmont) is explained once on the Longmont year overview and on the Sources, method and limits page.