Longmont, Colorado, enjoys a semi-arid climate with over 300 days of sunshine annually, making it an ideal destination for outdoor enthusiasts. Summers are warm and dry, with average highs in the upper 80s°F (around 30°C), while winters are cool, often bringing snow and crisp mountain air. The proximity to the Rockies keeps the weather dynamic, with afternoon thunderstorms common in late summer. Thanks to the abundant sunshine, even winter days can be mild and pleasant, primarily when the sun reflects off the snow, offering bright and inviting conditions.
Average Temps
Month
High/Low
Rain
January
43/13
2 days
February
46/116
3 days
March
54/24
4 days
April
63/32
5 days
May
72/42
6 days
June
83/51
5 days
July
90/56
4 days
August
87/54
4 days
September
80/45
3 days
October
66/33
3 days
November
52/22
3 days
December
45/15
2 days
Source: NOAA
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