Climate almanac
Longmont
Colorado, US · 40.17°, -105.10°
What is the climate like in Longmont?
The best time to visit Longmont is typically June – October, with trip comfort peaking in September (8.6/10). Longmont is warmest in July, when daily highs average 89°F (32°C), and coolest in January, when lows fall to about 20°F (-7°C). The wettest month is typically May and the driest is December; the year sees roughly 20 in of precipitation.
- Best time to visitJune – October — comfort peaks in September (8.6/10)
- Warmest monthJuly — average high 89°F (32°C)
- Coolest monthJanuary — average low 20°F (-7°C)
- Wettest monthMay (4.3 in)
- Driest monthDecember (0.7 in)
- Annual precipitation20 in