Click on a day for an hourly weather forecast
The weather in Riverside in August is hot. The average temperatures are between 17°C and 33°C. Usually the days in August are hot while the nights are a bit cooler.
You can expect a few rainy days in Riverside during August, but usually the weather is comfortable in August.
Our weather forecast can give you a great sense of what weather to expect in Riverside in August 2025.
If you’re planning to visit Riverside in the near future, we highly recommend that you review the 14 day weather forecast for Riverside before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 6° | 3 | 28 | 0 | 44 mm | Good | Riverside in January |
| February | 18° / 6° | 2 | 26 | 0 | 52 mm | Good | Riverside in February |
| March | 20° / 7° | 2 | 29 | 0 | 30 mm | Good | Riverside in March |
| April | 23° / 8° | 1 | 29 | 0 | 19 mm | Perfect | Riverside in April |
| May | 25° / 10° | 1 | 30 | 0 | 10 mm | Perfect | Riverside in May |
| June | 29° / 13° | 0 | 30 | 0 | 3 mm | Good | Riverside in June |
| July | 32° / 17° | 2 | 29 | 0 | 27 mm | Good | Riverside in July |
| August | 33° / 17° | 1 | 30 | 0 | 19 mm | Good | Riverside in August |
| September | 31° / 16° | 0 | 30 | 0 | 11 mm | Good | Riverside in September |
| October | 27° / 12° | 1 | 30 | 0 | 13 mm | Perfect | Riverside in October |
| November | 22° / 9° | 1 | 29 | 0 | 21 mm | Good | Riverside in November |
| December | 17° / 5° | 3 | 28 | 0 | 61 mm | Good | Riverside in December |