Longmont, CO weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Longmont now
Loading the National Weather Service forecast…
Longmont weather by the hour
Longmont weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Longmont.
This week in Longmont
Sunrise, sunset and moon in Longmont
What is the weather usually like in Longmont?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 91°F average high
- Januarycoldest month · 14°F average low
- 15.2 inprecipitation per year · 386 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Longmont: May–June and September–October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station LONGMONT 2 ESE, CO US (USC00055116), adjusted for the elevation of Longmont.
Longmont weather month by month
Sunrise and sunset in Longmont through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:19 AM | 5:00 PM | 9 h 41 min |
| February | 6:51 AM | 5:37 PM | 10 h 45 min |
| March | 7:09 AM | 7:08 PM | 11 h 58 min |
| April | 6:20 AM | 7:40 PM | 13 h 20 min |
| May | 5:42 AM | 8:10 PM | 14 h 27 min |
| June | 5:28 AM | 8:33 PM | 15 h 4 min |
| July | 5:42 AM | 8:30 PM | 14 h 47 min |
| August | 6:10 AM | 7:58 PM | 13 h 48 min |
| September | 6:40 AM | 7:10 PM | 12 h 30 min |
| October | 7:10 AM | 6:22 PM | 11 h 12 min |
| November | 6:44 AM | 4:45 PM | 10 h 0 min |
| December | 7:14 AM | 4:37 PM | 9 h 22 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Longmont?
Longmont has a cold semi-arid climate. The warmest month is July, with an average high of 91°F (33°C), and the coldest is January, with average lows of 14°F (-10°C).
It gets about 15.2 inches (386 mm) of precipitation a year. The wettest month is April and the driest is December.
The best time to visit Longmont is May–June and September–October. At 4,984 ft of elevation, nights are cool even in summer. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Longmont
Weather in towns near Longmont
Questions about the weather in Longmont
What is the hottest month in Longmont?
July, with an average high of 91°F (33°C).
What is the coldest month in Longmont?
January, with an average low of 14°F (-10°C).
How much does it rain in Longmont?
About 15.2 inches (386 mm) a year; the wettest month is April.
Does it snow in Longmont?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Longmont?
May–June and September–October, when temperatures are most pleasant and rainy days are fewer.
What climate does Longmont have?
Cold semi-arid (Köppen BSk).
What is the weather like in Longmont in November?
Highs average 53°F and lows 23°F, with about 0.8 inches of precipitation.
What time is sunrise in Longmont?
Around 6:44 AM in mid-November, and sunset around 4:45 PM. Today’s exact times are shown above.
Where does this Longmont weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Longmont.
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