Helena weather in September (Montana, United States of America)
How does the weather in Helena usually fare in September? Find out what kind of weather to expect during this month.
Temperatures
The weather in Helena is usually perfect in September, featuring high temperatures and moderate rainfall. Throughout the daytime, temperatures often hover around 22°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 6°C.
Precipitation
Helena in September usually receives moderate rainfall, averaging around 34 mm for the month. Rain is expected on roughly 9 days.Average sunshine
With approximately 254 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Helena. June, July, August and September typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.
For an in-depth look at the yearly conditions, visit our specialized Helena climate page with graphs.
Helena, monthly averages in September
Min Temperature
6°C
Max Temperature
22°C
Chance of Rain
31%
Precipitation
34 mm
Rainy days
9 days
Humidity
54%
Sunshine
254 hours
Percentage Sunshine
68%
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 Helena, 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.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 Helena.
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.
