Riverside County Weather Forecast
Riverside County weather: 83°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for Riverside County
Derived from the current forecast window - not an official warning.
Peak gusts of 17 mph and 0 thunderstorm days in the next 16 days.
Wettest single day forecast at 0,0 in, 0,0 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
Active alerts for Riverside County
Heat Advisory issued August 21 at 9:35PM PDT until August 24 at 8:00PM PDT by NWS San Diego CA
Issued by NWS San Diego CA
16-day forecast for Riverside County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | 🌥️ Fog | 104° / 74° | 5% | 14 mph | 8 |
| Sat, Aug 22 | ☁️ Overcast | 102° / 71° | 1% | 13 mph | 8 |
| Sun, Aug 23 | ☁️ Overcast | 105° / 69° | 0% | 13 mph | 8 |
| Mon, Aug 24 | ☁️ Overcast | 104° / 84° | 0% | 13 mph | 8 |
| Tue, Aug 25 | 🌤️ Mainly clear | 106° / 84° | 0% | 14 mph | 8 |
| Wed, Aug 26 | ☀️ Clear sky | 105° / 87° | 0% | 13 mph | 8 |
| Thu, Aug 27 | ⛅ Partly cloudy | 101° / 85° | 0% | 12 mph | 8 |
| Fri, Aug 28 | ⛅ Partly cloudy | 103° / 84° | 0% | 12 mph | 8 |
| Sat, Aug 29 | 🌤️ Mainly clear | 105° / 85° | 2% | 12 mph | 8 |
| Sun, Aug 30 | ☀️ Clear sky | 106° / 86° | 2% | 12 mph | 8 |
| Mon, Aug 31 | ☁️ Overcast | 105° / 86° | 2% | 13 mph | 8 |
| Tue, Sep 1 | 🌤️ Mainly clear | 104° / 85° | 0% | 15 mph | 8 |
| Wed, Sep 2 | ☀️ Clear sky | 102° / 83° | 10% | 13 mph | 8 |
| Thu, Sep 3 | ☁️ Overcast | 101° / 84° | 9% | 14 mph | 8 |
| Fri, Sep 4 | ☁️ Overcast | 99° / 87° | 7% | 13 mph | 8 |
| Sat, Sep 5 | ☁️ Overcast | 98° / 85° | 19% | 13 mph | 8 |
What this means for Riverside County
Today is warmer than average for August. The forecast high of 104°F is 7.6°F above the 96°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 57°F.
See the Riverside County forecast by time range
Riverside County weather - more answers
Explore Riverside County
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Riverside County?
Riverside County is a county in California. Its coordinates are 33.9533, -117.3961. It lies in North America.
What is the weather like in Riverside County right now?
It is currently 83°F (28°C) with overcast. Humidity is 42% and wind is 3 mph.
When is the best time to visit Riverside County?
April, May, June, July, August, September and October offer the most comfortable conditions in Riverside County, which has a Mediterranean climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Riverside County in?
Riverside County observes America/Los_Angeles (UTC-07:00). The local time is 10:12 PM.
How many people live in Riverside County?
Riverside County has a population of approximately 2.5 million.
What is the nearest airport to Riverside County?
The closest airports are Los Angeles International Airport (LAX), 58 mi away, San Diego International Airport (SAN), 85 mi away and Harry Reid International Airport (LAS), 194 mi away.
What are the top things to do in Riverside County?
Popular options include Disneyland Resort, Hollywood Sign, Santa Monica State Beach, Anza-Borrego Desert State Park, Joshua Tree National Park and Coronado Beach.
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| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 10:12 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
