RANCHO CUCAMONGA, CA 91739 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

12:53 PM PDT JUL 16, 2025
Few Clouds
84°F
Feels Like: 83°F
Dewpoint: 54°F
Rel. Hum.: 36%
Visibility: 10 miles
Wind: WSW at 6 mph
Pressure: 29.93 inches
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RANCHO CUCAMONGA, CA 91739
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. Lows 55 to 63. Areas of winds west 10 to 15 mph with gusts to 25 mph this evening becoming light.
THURSDAY
Partly cloudy. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Highs 86 to 94. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon. Chance of measurable precipitation 20 percent.
THURSDAY NIGHT
Mostly clear in the evening, then partly cloudy with a slight chance of showers overnight. Lows 57 to 64. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light. Chance of measurable precipitation 20 percent.
FRIDAY
Partly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs 86 to 94. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon. Chance of measurable precipitation 20 percent.
FRIDAY NIGHT
Mostly clear. Lows 56 to 63. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
SATURDAY
Mostly sunny. Highs 88 to 94.
SATURDAY NIGHT
Mostly clear. Lows 56 to 63.
SUNDAY
Mostly sunny. Highs 89 to 96.
SUNDAY NIGHT
Mostly clear. Lows 55 to 62.
MONDAY
Partly cloudy with patchy fog in the morning...becoming sunny. Highs 87 to 94.
MONDAY NIGHT
Mostly clear. Lows 53 to 60.
TUESDAY
Mostly sunny. Highs 87 to 94.
TUESDAY NIGHT
Mostly clear. Lows 53 to 61.

Visible Weather Satellite
RANCHO CUCAMONGA, CA 91739
Infrared Weather Satellite
RANCHO CUCAMONGA, CA 91739
NEXRAD Weather Radar
RANCHO CUCAMONGA, CA 91739

ONTARIO, CA 3 hourly weather forecast

weather forecast created  5:00 AM PDT  7/16/2025
Wednesday
16 JUL 2025
RANCHO CUCAMONGA, CA 91739 weather forecast Day 1, 12 hours 11 AM 75° 75° Clear 1%

0% Thunder
( 1% severe)
SW   6 58% 59°
High 86° RANCHO CUCAMONGA, CA 91739 weather forecast Day 1, 15 hours 2 PM 85° 84° Clear WSW   10 40% 58°
Clear



RANCHO CUCAMONGA, CA 91739 weather forecast Day 1, 18 hours 5 PM 83° 83° Clear 2%

0% Thunder
( 0% severe)
WSW   13 43% 58°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 1, 21 hours 8 PM 74° 74° Clear WSW   12 57% 58°
Thursday
17 JUL 2025
RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 0 hours 11 PM 68° 68° Clear 2%

0% Thunder
( 0% severe)
WSW   8 73% 59°
Low 62° RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 3 hours 2 AM 65° 65° Clear WSW   5 81% 59°
High 88° RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 6 hours 5 AM 64° 66° Partly Cloudy 2%

0% Thunder
( 1% severe)
WSW   2 87% 60°

Partly Cloudy



RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 9 hours 8 AM 66° 66° Mostly Cloudy SW   2 81% 60°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 12 hours 11 AM 76° 78° Partly Cloudy 8%

0% Thunder
( 7% severe)
SW   6 58% 60°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 15 hours 2 PM 85° 84° Partly Cloudy WSW   10 40% 58°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 18 hours 5 PM 84° 83° Partly Cloudy 3%

0% Thunder
( 5% severe)
WSW   13 41% 58°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 2, 21 hours 8 PM 76° 78° Partly Cloudy WSW   12 54% 58°
Friday
18 JUL 2025
RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 0 hours 11 PM 69° 69° Partly Cloudy 2%

0% Thunder
( 6% severe)
WSW   9 70% 59°
Low 64° RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 3 hours 2 AM 66° 66° Partly Cloudy WSW   5 81% 60°
High 89° RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 6 hours 5 AM 65° 65° Partly Cloudy 3%

0% Thunder
( 4% severe)
SW   2 84% 60°

Partly Cloudy



RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 9 hours 8 AM 67° 67° Partly Cloudy SSW   3 81% 61°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 15 hours 11 AM 76° 78° Partly Cloudy 11%
RAIN
<.01 in
0% Thunder
( 12% severe)
SW   7 60% 61°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 18 hours 2 PM 86° 86° Partly Cloudy SW   10 42% 60°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 3, 21 hours 5 PM 85° 85° Partly Cloudy     SW   13 41% 59°

ONTARIO, CA extended weather forecast

Saturday
19 JUL 2025
Sunday
20 JUL 2025
Monday
21 JUL 2025
Tuesday
22 JUL 2025
Wednesday
23 JUL 2025
Low 66° Low 67° Low 67° Low 64° Low 63°
High 90° High 91° High 89° High 90° High 89°
RANCHO CUCAMONGA, CA 91739 weather forecast Day 4 RANCHO CUCAMONGA, CA 91739 weather forecast Day 5 RANCHO CUCAMONGA, CA 91739 weather forecast Day 6 RANCHO CUCAMONGA, CA 91739 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
9% Rain
Partly Cloudy
Partly Cloudy
Partly Cloudy
3% Rain
Partly Cloudy
4% Rain
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