Ottawa weather in September (Illinois, United States of America)
What kind of temperatures can you expect in Ottawa during September? Thinking about a visit? Explore this page for a full overview of the weather conditions this month.
Temperatures
During September, Ottawa is known for its perfect weather, characterized by high temperatures and moderate rainfall. Expect temperatures to climb to 25°C during the day, with nighttime readings dropping to 12°C.
Precipitation
Ottawa in September usually receives moderate rainfall, averaging around 77 mm for the month. Rain is expected on roughly 9 days.If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Ottawa. July and September typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Ottawa climate page with graphs.
Ottawa, monthly averages in September
Min Temperature
12°C
Max Temperature
25°C
Chance of Rain
30%
Precipitation
77 mm
Rainy days
9 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?
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.
Interested in more climate information?
This site provides you with all the information you need about the climate in Ottawa.
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.
