Riverside Weather in September

September in Riverside sees daytime temperatures around 34°C (93°F) and lows of 17°C (63°F) at night. Rainfall is minimal, so you're unlikely to need an umbrella.

Rainfall in Riverside in September

You can expect rain on around a single day based on historical patterns, with 4.5 mm (0.2 in) average for the month. If rain does fall, it tends to be a moderate shower rather than anything heavy.

Temperature in Riverside in September

Daytime temperatures in Riverside reach 34°C (93°F) in September, dropping to 17°C (63°F) at night. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. At 17°C (63°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Riverside in September

Enjoy a sunny month with about 290 hours of sunshine, the clear skies make Riverside even more beautiful.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, May, October and November typically offer the best weather for Riverside.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Riverside's climate page.

Riverside Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 34°C (93°F)  

Chance of Rain 3%  

Precipitation 4.5 mm (0.2 in)  

Rainy days a single day  

Sunshine 290 hours *  

Percentage Sunshine *  

* Data from: Corona, the United States of America (18 KM, 11 Miles).

What to Wear in Riverside in September

Pack for serious heat in Riverside in September. Prioritize clothing that breathes and doesn't cling or stick. Lightweight cotton, linen, and moisture-wicking fabrics are ideal. A wide hat provides welcome shade. Dry conditions mean you won't need to worry about rain protection. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Riverside in September

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

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Riverside's climate page.

More climate data for Riverside

Temperature Rainfall Sunshine

See the full Riverside climate overview or explore weather in the United States of America.