Tomorrow's Weather Forecast - Riverside

Tomorrow's weather in Riverside. high 34°C (93°F), low 20°C (68°F). Overcast.

Tomorrow’s Outlook

Tomorrow will be 2°C cooler than today. A warm, sunny day is expected, with rain chances staying low throughout. Humidity sits at a moderate 62%, so the air shouldn't feel unusually damp or dry. A light breeze near 21 km/h is expected. Sunrise is at 6:30 AM and sunset at 6:59 PM, for about 12h 29m of daylight.

Tomorrow
34°/ 20°
Today36° / 24°

Tomorrow’s Hourly Weather Outlook

Morning6 AM – Noon24°
Rain probability
0%
Wind speed
6 km/h
AfternoonNoon – 6 PM33°
Rain probability
0%
Wind speed
21 km/h
Evening6 PM – Midn23°
Rain probability
0%
Wind speed
16 km/h
NightMidn – 6 AM22°
Rain probability
0%
Wind speed
4 km/h

24-Hour Rain & Temperature Forecast

Tomorrow12 Sep
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Temperature · peaks at +34°C

Planning Advice for Tomorrow

Clothing
Light layers work well; a jacket for the evening.
Outdoor
Good conditions for outdoor activities.
Travel
Standard travel conditions expected.

Sunrise & Sunset

Sunrise
Dawn 6:00 AM
Total Daylight
Full day forecastSolar noon 12:45 PM
Sunset
Dusk 7:29 PM
vs today-2 min daylight
Sunrise shiftSame time
Sunset shift2 min earlier

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Riverside is forecast to reach a high of 34°C tomorrow, with an overnight low around 20°C. That's 1° above the long-term average high of 33°C for this time of year. It continues a recent pattern — 15 of the last 28 days with published data have run warmer than normal. Expect little chance of rain (0% probability) and moderate breezes averaging 21 km/h. Air quality is currently Moderate (AQI 61), driven mainly by PM2.5 at 15 μg/m³.

Today vs Normal

36°C+3° above normal

The long-term average high for today is 33°C.

15 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

2026-08-28: 39°C39°2026-08-29: 37°C37°2026-08-30: 35°C35°2026-08-31: 32°C32°2026-09-01: 31°C31°2026-09-02: 30°C30°2026-09-03: 29°C29°2026-09-04: 30°C30°2026-09-05: 32°C32°2026-09-06: 23°C23°2026-09-07: 31°C31°2026-09-08: 34°C34°

Red = above normal, blue = at or below · last 12 days

Air Quality

Air Quality
Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.