ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

4:53 AM PDT SEP 14, 2026
Broken Clouds
Mist
66°F
Feels Like: 66°F
Dewpoint: 64°F
Rel. Hum.: 93%
Visibility: 5 miles
Wind: WSW at 3 mph
Pressure: 29.84 inches
Last 72 hours

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ONTARIO, CA 91758
Weather Forecast

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Snow Depth pages
TODAY
Partly cloudy this morning...becoming sunny. Highs 87 to 92. Light winds becoming southwest 10 to 15 mph with gusts to 25 mph this afternoon.
TONIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 55 to 63. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
TUESDAY
Partly cloudy in the morning...becoming sunny. Highs 83 to 88. Areas of winds south to 10 mph becoming southwest in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows 53 to 61. Areas of winds south to 10 mph in the evening becoming light.
WEDNESDAY
Mostly sunny. Highs 81 to 86. Light winds becoming southwest to 10 mph in the afternoon.
WEDNESDAY NIGHT
Mostly clear. Lows 52 to 59.
THURSDAY
Mostly sunny. Highs 83 to 87.
THURSDAY NIGHT
Clear. Lows 53 to 60.
FRIDAY
Sunny. Highs 86 to 91.
FRIDAY NIGHT
Clear. Lows 54 to 61.
SATURDAY
Sunny. Highs 87 to 92.
SATURDAY NIGHT
Clear. Lows 55 to 62.
SUNDAY
Mostly sunny. Highs 86 to 91.

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  9/13/2026
Monday
14 SEP 2026
ONTARIO, CA 91758 weather forecast Day 1, 0 hours 11 PM 73° 73° Clear 0%

0% Thunder
( 0% severe)
WSW   7 71% 63°
Low 66° ONTARIO, CA 91758 weather forecast Day 1, 3 hours 2 AM 70° 70° Clear W   6 78% 63°
High 90° ONTARIO, CA 91758 weather forecast Day 1, 6 hours 5 AM 67° 67° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   5 87% 63°

Partly Cloudy



ONTARIO, CA 91758 weather forecast Day 1, 9 hours 8 AM 68° 68° Partly Cloudy   CALM 84% 63°
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 78° 79° Clear 0%

0% Thunder
( 0% severe)
  CALM 54% 60°
ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 87° 86° Clear WSW   7 35% 56°
ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 86° 85° Clear 0%

0% Thunder
( 0% severe)
WSW   13 39% 58°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 77° 79° Clear WSW   9 54% 59°
Tuesday
15 SEP 2026
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 71° 71° Clear 0%

0% Thunder
( 0% severe)
W   8 68% 60°
Low 63° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 67° 67° Partly Cloudy W   7 81% 61°
High 86° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 64° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   5 90% 61°

Partly Cloudy



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 66° 66° Partly Cloudy S   3 84% 61°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 75° 75° Clear 0%

0% Thunder
( 0% severe)
SSW   3 54% 57°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 82° 81° Clear SW   7 38% 54°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 81° 81° Clear 0%

0% Thunder
( 0% severe)
WSW   12 46% 58°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 74° 74° Clear WSW   9 62% 60°

ONTARIO, CA extended weather forecast

Wednesday
16 SEP 2026
Thursday
17 SEP 2026
Friday
18 SEP 2026
Saturday
19 SEP 2026
Sunday
20 SEP 2026
Low 62° Low 62° Low 59° Low 61° Low 61°
High 86° High 86° High 88° High 87° High 90°
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
Partly Cloudy
2% Rain
Clear
2% Rain
Clear
4% Rain
Clear
1% Rain
Clear
2% Rain
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