Ottawa weather in September (Illinois, United States of America)
Looking to travel to Ottawa in September? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.
In Ottawa the weather in September is generally perfect, characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 12°C.
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
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.
So, what should you wear in Ottawa 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 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 climate conditions. Find out where to go with our weather planner.