ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

8:53 PM PDT JUL 12, 2026
Broken Clouds
79°F
Feels Like: 81°F
Dewpoint: 63°F
Rel. Hum.: 58%
Visibility: 10 miles
Wind: W at 8 mph
Pressure: 29.92 inches
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ONTARIO, CA 91758
Weather Forecast

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TONIGHT
Partly cloudy. Patchy dense fog overnight. Lows 63 to 68. Areas of winds west to 10 mph this evening becoming light.
MONDAY
Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs 90 to 97. Light winds becoming west 10 mph in the afternoon. Chance of measurable precipitation 20 percent.
MONDAY NIGHT
Partly cloudy. Lows 64 to 68. Areas of winds west to 10 mph in the evening becoming light.
TUESDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 96 to 103. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows 67 to 72. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
WEDNESDAY
Mostly sunny. Highs 102 to 109.
WEDNESDAY NIGHT
Mostly clear. Lows 71 to 75.
THURSDAY
Mostly sunny in the morning, then partly cloudy with a chance of showers in the afternoon. Highs 97 to 104.
THURSDAY NIGHT
Partly cloudy. A slight chance of showers in the evening. Lows 66 to 70.
FRIDAY
Partly cloudy. A chance of showers and a slight chance of thunderstorms in the afternoon. Highs 90 to 97.
FRIDAY NIGHT
Partly cloudy with a slight chance of showers. Lows 64 to 68.
SATURDAY
Partly cloudy with a slight chance of showers. Highs 89 to 95.
SATURDAY NIGHT
Partly cloudy with a slight chance of showers in the evening, then mostly clear overnight. Lows 63 to 67.

Visible Weather Satellite
ONTARIO, CA 91758
Infrared Weather Satellite
ONTARIO, CA 91758
NEXRAD Weather Radar
ONTARIO, CA 91758

ONTARIO, CA 3 hourly weather forecast

weather forecast created  5:00 PM PDT  7/12/2026
Monday
13 JUL 2026
ONTARIO, CA 91758 weather forecast Day 1, 0 hours 11 PM 75° 75° Partly Cloudy 1%

0% Thunder
( 4% severe)
W   6 60% 60°
Low 68° ONTARIO, CA 91758 weather forecast Day 1, 3 hours 2 AM 72° 72° Partly Cloudy SW   5 68% 61°
High 95° ONTARIO, CA 91758 weather forecast Day 1, 6 hours 5 AM 69° 69° Partly Cloudy 6%

0% Thunder
( 4% severe)
W   1 76% 61°

Mostly Cloudy



ONTARIO, CA 91758 weather forecast Day 1, 9 hours 8 AM 71° 71° Partly Cloudy SSW   2 73% 62°
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 83° 84° Mostly Cloudy 9%

0% Thunder
( 12% severe)
SW   7 49% 62°
ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 90° 90° Mostly Cloudy WSW   9 38% 61°
ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 91° 91° Mostly Cloudy 5%

0% Thunder
( 7% severe)
WSW   12 37% 61°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 84° 84° Partly Cloudy WSW   9 44% 60°
Tuesday
14 JUL 2026
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 77° 79° Partly Cloudy 4%

0% Thunder
( 5% severe)
WSW   8 56% 60°
Low 68° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 72° 72° Partly Cloudy WSW   5 68% 61°
High 98° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 70° 70° Partly Cloudy 0%

0% Thunder
( 2% severe)
  CALM 78% 63°

Partly Cloudy



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 72° 72° Partly Cloudy   CALM 73% 63°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 86° 87° Clear 0%

0% Thunder
( 5% severe)
SW   7 48% 64°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 94° 95° Clear WSW   12 35% 62°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 95° 96° Clear 0%

0% Thunder
( 3% severe)
WSW   13 34% 62°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 88° 88° Clear WSW   9 42% 62°

ONTARIO, CA extended weather forecast

BAD DAY
BAD DATE
BAD DAY
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Low 72° Low 73° Low 74° Low 72° Low 71°
High 103° High 104° High 100° High 98° High 96°
ONTARIO, CA 91758 weather forecast Day 3 ONTARIO, CA 91758 weather forecast Day 4 ONTARIO, CA 91758 weather forecast Day 5 ONTARIO, CA 91758 weather forecast Day 6 ONTARIO, CA 91758 weather forecast Day 7
Mostly Cloudy
7% Rain
Clear
8% Rain
Partly Cloudy
4% Rain
Mostly Cloudy
25% Rain
Mostly Cloudy
13% Rain
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