Keystone weather in September (Colorado, United States of America)
What's the typical weather in Keystone for September? Wondering about the weather this month? Our guide has all the details you need.
Temperatures
Typically, September in Keystone includes moderate temperatures and moderate rainfall. Daytime temperatures are expected to be around 17°C, cooling off to about 2°C at night.
Precipitation
Keystone in September usually receives moderate rainfall, averaging around 40 mm for the month. When we look at the climate data from the last 30 years, you can expect around 12 days of rain.In case you lean more towards enjoying temperate temperatures and rain-free days June, July and August typically offer the most optimal weather. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Keystone climate page with graphs.
Keystone, monthly averages in September
Min Temperature
2°C
Max Temperature
17°C
Chance of Rain
40%
Precipitation
40 mm
Rainy days
12 days
Where to go in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in this month?
For visitors traveling to Keystone, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in Keystone.
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 travel conditions. Find out where to go with our weather planner.
