Longmont weather in September (Colorado, United States of America)
How is the weather in Longmont in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.
In Longmont, September is characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 27°C, while nights can cool down to about 8°C.
Longmont in September usually receives moderate rainfall, averaging around 41 mm for the month. When we look at the climate data from the last 30 years, we can expect around 7 days of rain.
The city usually sees around 270 hours of sunlight, indicating many sunny days.
So this is a great month to visit if you prefer dry days with pleasant temperatures. May, June, August and September typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Longmont climate page with graphs.
Longmont, monthly averages in September
Min Temperature
8°C
Max Temperature
27°C
Chance of Rain
23%
Precipitation
41 mm
Rainy days
7 days
Humidity
50% *
Sunshine
270 hours *
Percentage Sunshine
73% *
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Longmont in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Longmont.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
