11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Mainly clear
18°
Feels like 18°
Wind↑ NW 2 km/h
Humidity 51 %
Afternoon
Clear sky
22°
Feels like 22°
Wind↑ W 15 km/h
Humidity 33 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Partly cloudy
16°
Feels like 16°
Wind↑ WSW 5 km/h
Humidity 71 %
Afternoon
Rain
15°
Feels like 15°
Wind↑ SE 3 km/h
Gusts11 km/h
Humidity 88 %
💧 11.2 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Overcast
15°
Feels like 15°
Wind↑ WSW 6 km/h
Humidity 60 %
💧 0.1 mm
Afternoon
Clear sky
20°
Feels like 20°
Wind↑ WNW 4 km/h
Humidity 37 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Overcast
15°
Feels like 15°
Wind↑ W 5 km/h
Humidity 67 %
Riverside forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Riverside climate: what a normal year looks like
A normal year brings roughly 460 mm of rain — less than 88% of the towns of 20,000+ people we compared it with.
The wet season is concentrated from January to March, which brings 58% of the annual total; February by itself averages 107 mm.
Afternoons reach 30 °C or more from July to September; the typical peak is 32 °C in August.
Day and night differ most in September: 31 °C in the afternoon against 18 °C before dawn, a 13 °C swing.
Forecast highs for the coming week average 22 °C, 3 °C cooler than a normal October (25 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
17 °C
6 °C
89 mm
Feb
18 °C
6 °C
107 mm
Mar
19 °C
8 °C
68 mm
Apr
21 °C
10 °C
34 mm
May
24 °C
12 °C
18 mm
Jun
28 °C
15 °C
5 mm
Jul
32 °C
19 °C
6 mm
Aug
32 °C
19 °C
4 mm
Sep
31 °C
18 °C
8 mm
Oct
25 °C
13 °C
23 mm
Nov
21 °C
9 °C
31 mm
Dec
16 °C
5 °C
65 mm
Whole year
24 °C
12 °C
460 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 33.95° N, 117.40° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Riverside: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.53µg/m³
PM104µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Riverside
Rain observed over the last two hours by official weather radars around Riverside, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Riverside
Waning gibbous
87 % illuminated · 18.3 days
Rise 22:41 Set 13:14
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (America/Los_Angeles); phase and lit fraction from a synodic calculation.
Look up a past day in Riverside
Curious about the weather in Riverside on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Riverside weather at a glance
This page gathers everything about the weather in Riverside, CA: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “partly cloudy”, it is 19 °C (feels like 19 °C) and the wind blows at 2 km/h.
Expected range today: 13 °C to 22 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Riverside forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
