Current Conditions

Rialto, California

67°F20°C

Clear

Wind

NNE 4 mph6 km/h

Humidity

43%

Cloud Cover

As of Wednesday, September 23, 2026 at 8:15 AM PDT

Today's Outlook

Day

Mostly clear and hot, with a high of 89°F32°C and morning low of 67°F20°C. Light wind from the W around 4 mph7 km/h. Dry air.

Night

Mostly clear, with a low around 61°F16°C. Light wind from the E around 3 mph4 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 89°F32°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 2%	Wind W 3 mph5 km/h	Wednesday: Mostly clear and hot, with a high of 89°F32°C and morning low of 67°F20°C. Light wind from the W around 4 mph7 km/h. Dry air. Wednesday Night: Mostly clear, with a low around 61°F16°C. Light wind from the E around 3 mph4 km/h.
Clear	High 88°F31°C	Low 64°F18°C	Precip 0 in0.1 mm8%	Cloud 16%	Wind SSW 3 mph5 km/h	Thursday: Mostly clear and hot, with a high of 88°F31°C and morning low of 69°F20°C. Light wind from the SW around 4 mph7 km/h. Thursday Night: Mostly clear, with a low around 64°F18°C. Light wind from the E around 2 mph4 km/h.
Clear	High 88°F31°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 25%	Wind SW 3 mph5 km/h	Friday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 69°F21°C. Light wind from the SW around 5 mph7 km/h. Friday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the SE around 2 mph3 km/h.
Partly Cloudy	High 89°F32°C	Low 65°F18°C	Precip 0 in0 mm—	Cloud 70%	Wind S 4 mph6 km/h	Saturday: Mostly cloudy and hot, with a high of 89°F32°C and morning low of 69°F21°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 65°F18°C. Light wind from the SE around 2 mph4 km/h.
Light Rain	High 75°F24°C	Low 66°F19°C	Precip 0.11 in2.9 mm36%	Cloud 70%	Wind S 3 mph5 km/h	Sunday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 69°F20°C. Light wind from the SSW around 4 mph6 km/h. 36% chance of light rain throughout the day. Sunday Night: Mostly cloudy, with a low around 66°F19°C. Light wind from the SSE around 2 mph4 km/h. 21% chance of drizzle throughout the night.
Showers	High 76°F25°C	Low 62°F17°C	Precip 0.17 in4.2 mm32%	Cloud 41%	Wind SSW 3 mph5 km/h	Monday: Partly cloudy and warm, with a high of 76°F25°C and morning low of 65°F18°C. Light wind from the SW around 4 mph6 km/h. 32% chance of showers throughout the day. Monday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the ENE around 2 mph4 km/h. 25% chance of drizzle throughout the night.
Showers	High 81°F27°C	Low 61°F16°C	Precip 0.11 in2.9 mm19%	Cloud 24%	Wind NNE 4 mph6 km/h	Tuesday: Mostly clear and warm, with a high of 81°F27°C and morning low of 65°F18°C. Light wind from the NNE around 5 mph7 km/h. 19% chance of showers throughout the day. Dry air. Tuesday Night: Mostly clear, with a low around 61°F16°C. Light wind from the NE around 3 mph5 km/h. 17% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	89°F32°C	61°F16°C	0 in0 mm· —	2%	Clear	W 3 mph5 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 67°F20°C. Light wind from the W around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 61°F16°C. Light wind from the E around 3 mph4 km/h.
	ThursdaySep 24	88°F31°C	64°F18°C	0 in0.1 mm· 8%	16%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 69°F20°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 64°F18°C. Light wind from the E around 2 mph4 km/h.
	FridaySep 25	88°F31°C	66°F19°C	0 in0 mm· —	25%	Clear	SW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 69°F21°C. Light wind from the SW around 5 mph7 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SE around 2 mph3 km/h.
	SaturdaySep 26	89°F32°C	65°F18°C	0 in0 mm· —	70%	Partly Cloudy	S 4 mph6 km/h
DayMostly cloudy and hot, with a high of 89°F32°C and morning low of 69°F21°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. Dry air. NightMostly cloudy, with a low around 65°F18°C. Light wind from the SE around 2 mph4 km/h.
	SundaySep 27	75°F24°C	66°F19°C	0.11 in2.9 mm· 36%	70%	Light Rain	S 3 mph5 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 69°F20°C. Light wind from the SSW around 4 mph6 km/h. 36% chance of light rain throughout the day. NightMostly cloudy, with a low around 66°F19°C. Light wind from the SSE around 2 mph4 km/h. 21% chance of drizzle throughout the night.
	MondaySep 28	76°F25°C	62°F17°C	0.17 in4.2 mm· 32%	41%	Showers	SSW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 65°F18°C. Light wind from the SW around 4 mph6 km/h. 32% chance of showers throughout the day. NightPartly cloudy, with a low around 62°F17°C. Light wind from the ENE around 2 mph4 km/h. 25% chance of drizzle throughout the night.
	TuesdaySep 29	81°F27°C	61°F16°C	0.11 in2.9 mm· 19%	24%	Showers	NNE 4 mph6 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 65°F18°C. Light wind from the NNE around 5 mph7 km/h. 19% chance of showers throughout the day. Dry air. NightMostly clear, with a low around 61°F16°C. Light wind from the NE around 3 mph5 km/h. 17% chance of drizzle throughout the night.
	WednesdaySep 30	83°F29°C	62°F17°C	0.12 in3.1 mm· 16%	28%	Showers	NNE 3 mph6 km/h
DayPartly cloudy and warm, with a high of 83°F29°C and morning low of 66°F19°C. Light wind from the WSW around 4 mph6 km/h. 16% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 62°F17°C. Light wind from the NE around 3 mph5 km/h. 16% chance of showers throughout the night.
	ThursdayOct 1	85°F29°C	63°F17°C	0.04 in1 mm· 8%	35%	Clear	SW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Light wind from the SW around 4 mph6 km/h. Dry air. NightPartly cloudy, with a low around 63°F17°C. Light wind from the ENE around 2 mph4 km/h.
	FridayOct 2	86°F30°C	64°F18°C	0.03 in0.7 mm· 5%	22%	Clear	NW 3 mph5 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 67°F20°C. Light wind from the WSW around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 64°F18°C. Light wind from the NE around 2 mph4 km/h.
	SaturdayOct 3	87°F31°C	64°F18°C	0.02 in0.4 mm· 5%	15%	Clear	NNE 3 mph6 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 67°F20°C. Light wind from the N around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 64°F18°C. Light wind from the NE around 3 mph5 km/h.
	SundayOct 4	86°F30°C	64°F18°C	0.02 in0.4 mm· 6%	20%	Clear	NE 4 mph6 km/h
DayMostly clear and hot, with a high of 86°F30°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 64°F18°C. Light wind from the NE around 3 mph5 km/h.
	MondayOct 5	86°F30°C	64°F18°C	0.02 in0.6 mm· 7%	20%	Clear	E 3 mph6 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 67°F20°C. Light wind from the SSW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 64°F18°C. Light wind from the NE around 3 mph4 km/h.
	TuesdayOct 6	86°F30°C	63°F17°C	0.02 in0.5 mm· 7%	19%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 68°F20°C. Light wind from the SW around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 63°F17°C. Light wind from the ENE around 2 mph4 km/h.
	WednesdayOct 7	86°F30°C	64°F18°C	0.02 in0.5 mm· 6%	17%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 67°F20°C. Light wind from the SW around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 64°F18°C. Light wind from the ENE around 2 mph4 km/h.

Nearby Cities

Bloomington3 mi5 km Fontana4 mi6 km Colton4 mi6 km San Bernardino5 mi7 km Loma Linda7 mi12 km Rubidoux8 mi13 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 34.1064°N, 117.3703°W·Elevation: 383m·Timezone: America/Los_Angeles·Population: 103,132