California · NWS SGX office

Rialto, CA weather

It is 54°F at DEVORE as of Oct 28, 2:10 AM PDT. Overnight: Mostly Cloudy, low near 55°F. Forecast from the National Weather Service, issued Oct 28, 12:03 AM PDT.

Updated Oct 28, 2:16 AM PDT (snapshot)

Current conditions

Temperature

54°F

Mostly Cloudy

Wind

NW 3 mph, gusts 5 mph

Humidity 88% · dew point 51°F

Pressure · visibility

—

Visibility —

Observed at DEVORE (DVOC1), Oct 28, 2:10 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Rialto forecast zone right now.

Around the NWS SGX forecast area

1 active alert covers zones served by the SGX office near Rialto:

  • Coastal Flood Warning

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Rialto (local time)
TimeTempForecastPrecip. chanceWind
Wed 4 AM56°FMostly Cloudy0% 0 mph
Wed 5 AM55°FMostly Cloudy0%NW 5 mph
Wed 6 AM55°FPartly Sunny0%NW 5 mph
Wed 7 AM55°FPartly Sunny0%N 5 mph
Wed 8 AM56°FMostly Sunny0% 0 mph
Wed 9 AM59°FMostly Sunny0% 0 mph
Wed 10 AM64°FMostly Sunny0% 0 mph
Wed 11 AM67°FSunny0% 0 mph
Wed 12 PM69°FSunny0% 0 mph
Wed 1 PM72°FSunny0% 0 mph
Wed 2 PM73°FSunny0%S 5 mph
Wed 3 PM74°FSunny0%S 5 mph
Wed 4 PM75°FSunny0%SW 5 mph
Wed 5 PM73°FSunny0%SW 5 mph
Wed 6 PM71°FMostly Clear0%SW 5 mph
Wed 7 PM69°FMostly Clear0%W 5 mph
Wed 8 PM65°FPartly Cloudy0%S 5 mph
Wed 9 PM64°FPartly Cloudy0%SW 5 mph
Wed 10 PM63°FPartly Cloudy0% 0 mph
Wed 11 PM61°FMostly Cloudy0% 0 mph
Thu 12 AM60°FMostly Cloudy0% 0 mph
Thu 1 AM59°FMostly Cloudy0% 0 mph
Thu 2 AM58°FMostly Cloudy0% 0 mph
Thu 3 AM57°FMostly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Rialto can differ.

7-day forecast

Overnight

Low 55°F

Mostly cloudy, with a low around 55. North wind 0 to 5 mph.

Wednesday

High 75°F·Low 56°F

Mostly sunny, with a high near 75. Southwest wind 0 to 5 mph.

Wednesday Night: Mostly cloudy, with a low around 56. Southeast wind 0 to 5 mph.

Thursday

High 73°F·Low 58°F

Partly sunny, with a high near 73. Southeast wind 0 to 5 mph.

Thursday Night: Mostly cloudy, with a low around 58. Southwest wind 0 to 5 mph.

Friday

High 70°F·Low 55°F

Partly sunny, with a high near 70.

Friday Night: Mostly cloudy, with a low around 55.

Saturday

High 70°F·Low 56°F

A chance of rain showers after 11am. Mostly cloudy, with a high near 70.

Saturday Night: Rain showers likely. Cloudy, with a low around 56.

Sunday

High 67°F·Low 55°F

A chance of rain showers. Partly sunny, with a high near 67.

Sunday Night: A slight chance of rain showers before 10pm. Mostly clear, with a low around 55.

Monday

High 72°F·Low 56°F

Sunny, with a high near 72.

Monday Night: Mostly clear, with a low around 56.

Tuesday

High 73°F

Sunny, with a high near 73.

Nearby cities

Larger cities in the area

Other cities in San Bernardino County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Rialto is served by the National Weather Service SGX forecast office, forecast zone CAZ048, county zone CAC071.
Location used
The Census Bureau's internal point for Rialto (34.1174, -117.3892), in San Bernardino County. Population: 104,918 (2024 estimate), number 66 of the 296 California cities on this site.
Radar
Nearest NWS radar: KSOX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/34.1174,-117.3892 (forecast issued Oct 28, 12:03 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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