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

What weather conditions can you expect in Rialto this September? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

During September, Rialto usually has very high temperatures and almost no rainfall. During September, the summer season is in full swing. Daytime temperatures are expected to be around 34°C, cooling off to about 17°C at night. Note that these temperatures are average, but some days may be hotter. Dress in cool, breathable fabrics to stay comfortable in the heat.

Precipitation

Rialto in September usually receives almost no rainfall, averaging around 4.6 mm for the month. Records from the past 30 years suggest that around a single day will experience rain.

Average sunshine

There are approximately 290 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

If your ideal day consists of dry skies and moderate temperatures January, February, March, April, May, June, October and November generally stand out with the best circumstances. While August tends to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Rialto climate page with graphs.

 

Rialto, monthly averages in September

Min Temperature 17°C  

Max Temperature 34°C  

Chance of Rain 3%  

Precipitation 4.6 mm  

Rainy days a single day  

Sunshine 290 hours *  

Percentage Sunshine *  

Data from: Corona, the United States of America (31 KM, 19 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

Map not visible? Whoops sorry! Please refresh the page.

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 Rialto.

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.