Ontario weather in September (California, United States of America)

Is Ontario a good destination in September, weather-wise? See what weather conditions to anticipate this month with our guide.

Temperatures

Experience perfect weather in Ontario during September, featuring very high temperatures and almost no rainfall. During September, you’ll experience the summer season. Throughout the daytime, temperatures often hover around 33°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 17°C. These are average temperatures, but occasional heat spikes are possible. Stay comfortable by wearing light clothing and drinking water.

Precipitation

Ontario in September usually receives almost no rainfall, averaging around 4.2 mm for the month. Analyzing past climate data, one can expect approximately a single day of rain.

Average sunshine

With around 290 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

So this is a great month to visit if you prefer dry days with pleasant temperatures. January, February, March, April, May, June, July, September, October and November typically offer the most optimal weather. In contrast, August and December tend to have less optimal conditions.

Need inspiration to choose your next destination? Our innovative weather planner helps you discover the perfect getaway tailored to your ideal climate conditions.

 

Ontario, monthly averages in September

Min Temperature 17°C  

Max Temperature 33°C  

Chance of Rain 3%  

Precipitation 4.2 mm  

Rainy days a single day  

Sunshine 290 hours *  

Percentage Sunshine *  

Data from: Corona, the United States of America (22 KM, 13 Miles).

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.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

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.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Ontario.

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.