Current Conditions

Fontana, California

67°F19°C
Cloudy

Wind

SSW 2 mph4 km/h

Humidity

80%

Cloud Cover

94%

As of Thursday, August 13, 2026 at 5:46 AM PDT

Today's Outlook

Day

Overcast and warm, with a high of 82°F28°C and morning low of 69°F21°C. Breezy from the SSW at 6 to 7 mph9 to 12 km/h.

Night

Overcast, with a low around 67°F19°C. Light wind from the SSW around 3 mph5 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
CloudyHigh 82°F28°CLow 67°F19°CPrecip 0 in0 mmCloud 93%Wind SSW 5 mph7 km/hThursday: Overcast and warm, with a high of 82°F28°C and morning low of 69°F21°C. Breezy from the SSW at 6 to 7 mph9 to 12 km/h. Thursday Night: Overcast, with a low around 67°F19°C. Light wind from the SSW around 3 mph5 km/h.
ClearHigh 85°F29°CLow 66°F19°CPrecip 0 in0.1 mm4%Cloud 18%Wind SSW 4 mph6 km/hFriday: Mostly clear and warm, with a high of 85°F29°C and morning low of 69°F21°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. Friday Night: Mostly clear, with a low around 66°F19°C. Light wind from the SW around 3 mph4 km/h.
ClearHigh 87°F30°CLow 65°F19°CPrecip 0 in0 mmCloud 8%Wind SW 3 mph5 km/hSaturday: Mostly clear and hot, with a high of 87°F30°C and morning low of 70°F21°C. Breezy from the SW at 5 to 7 mph7 to 11 km/h. Saturday Night: Mostly clear, with a low around 65°F19°C. Light wind from the SW around 2 mph3 km/h.
ClearHigh 91°F33°CLow 66°F19°CPrecip 0 in0 mmCloud 23%Wind SW 3 mph5 km/hSunday: Mostly clear and hot, with a high of 91°F33°C and morning low of 72°F22°C. Light wind from the SW around 4 mph7 km/h. Sunday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the SW around 2 mph3 km/h.
Partly CloudyHigh 92°F33°CLow 69°F20°CPrecip 0 in0 mmCloud 47%Wind SW 3 mph5 km/hMonday: Partly cloudy and hot, with a high of 92°F33°C and morning low of 74°F23°C. Light wind from the SW around 4 mph7 km/h. Monday Night: Mostly cloudy, with a low around 69°F20°C. Light wind from the SW around 2 mph3 km/h.
ClearHigh 93°F34°CLow 69°F21°CPrecip 0 in0 mmCloud 33%Wind SW 3 mph5 km/hTuesday: Partly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C. Light wind from the SW around 5 mph7 km/h. Tuesday Night: Partly cloudy, with a low around 69°F21°C. Light wind from the SSW around 2 mph3 km/h.
ClearHigh 93°F34°CLow 69°F21°CPrecip 0 in0 mmCloud 20%Wind SW 3 mph5 km/hWednesday: Mostly clear and hot, with a high of 93°F34°C and morning low of 75°F24°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. Wednesday Night: Mostly clear, with a low around 69°F21°C. Light wind from the SSW around 2 mph3 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
ThursdayAug 1382°F28°C67°F19°C0 in0 mm· —93%CloudySSW 5 mph7 km/h
FridayAug 1485°F29°C66°F19°C0 in0.1 mm· 4%18%ClearSSW 4 mph6 km/h
SaturdayAug 1587°F30°C65°F19°C0 in0 mm· —8%ClearSW 3 mph5 km/h
SundayAug 1691°F33°C66°F19°C0 in0 mm· —23%ClearSW 3 mph5 km/h
MondayAug 1792°F33°C69°F20°C0 in0 mm· —47%Partly CloudySW 3 mph5 km/h
TuesdayAug 1893°F34°C69°F21°C0 in0 mm· —33%ClearSW 3 mph5 km/h
WednesdayAug 1993°F34°C69°F21°C0 in0 mm· —20%ClearSW 3 mph5 km/h
ThursdayAug 2092°F34°C69°F21°C0 in0 mm· —28%ClearSW 3 mph5 km/h
FridayAug 2192°F34°C69°F21°C0 in0 mm· —26%ClearSW 3 mph5 km/h
SaturdayAug 2292°F33°C69°F21°C0 in0.1 mm· 5%21%ClearSW 3 mph5 km/h
SundayAug 2392°F33°C69°F20°C0 in0.1 mm· 4%17%ClearSSW 3 mph5 km/h
MondayAug 2492°F34°C68°F20°C0 in0.1 mm· 5%16%ClearSSW 3 mph5 km/h
TuesdayAug 2592°F33°C69°F20°C0.01 in0.3 mm· 7%18%ClearSW 3 mph5 km/h
WednesdayAug 2692°F33°C69°F20°C0.01 in0.3 mm· 9%26%ClearSW 3 mph5 km/h
ThursdayAug 2790°F32°C69°F21°C0.03 in0.8 mm· 11%34%DrizzleSSW 3 mph5 km/h

Nearby Cities

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

PatternExampleDescription
/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=11.5Find 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: 34.0922°N, 117.4351°W·Elevation: 377m·Timezone: America/Los_Angeles·Population: 212,704