ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

12:53 AM PDT AUG 24, 2026
Few Clouds
79°F
Feels Like: 80°F
Dewpoint: 57°F
Rel. Hum.: 47%
Visibility: 10 miles
Wind: SSW at 3 mph
Pressure: 29.93 inches
Last 72 hours

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ONTARIO, CA 91758
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. Lows 68 to 74. Areas of winds west 10 to 15 mph this evening becoming light.
MONDAY
Mostly sunny. Highs 99 to 105. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
MONDAY NIGHT
Mostly clear. Lows 68 to 73. Areas of winds west 10 to 15 mph in the evening becoming light.
TUESDAY
Mostly sunny. Highs 101 to 107. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows 70 to 75. Areas of winds west 10 to 15 mph in the evening becoming light.
WEDNESDAY
Mostly sunny. Highs 101 to 108.
WEDNESDAY NIGHT
Mostly clear. Lows 72 to 76.
THURSDAY
Mostly sunny. Highs 102 to 108.
THURSDAY NIGHT
Mostly clear. Lows 72 to 76.
FRIDAY
Partly cloudy. Highs 101 to 107.
FRIDAY NIGHT
Mostly clear. Lows 70 to 74.
SATURDAY
Mostly sunny. Highs 100 to 107.
SATURDAY NIGHT
Mostly clear. Lows 68 to 73.

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  8/23/2026
Monday
24 AUG 2026
ONTARIO, CA 91758 weather forecast Day 1, 0 hours 11 PM 82° 81° Partly Cloudy 1%

0% Thunder
( 0% severe)
W   7 40% 55°
Low 74° ONTARIO, CA 91758 weather forecast Day 1, 3 hours 2 AM 78° 79° Clear WNW   3 48% 57°
High 102° ONTARIO, CA 91758 weather forecast Day 1, 6 hours 5 AM 75° 75° Clear 3%

0% Thunder
( 0% severe)
  CALM 55% 58°

Partly Cloudy



ONTARIO, CA 91758 weather forecast Day 1, 9 hours 8 AM 78° 79° Partly Cloudy   CALM 50% 58°
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 91° 89° Clear 3%

0% Thunder
( 2% severe)
SW   3 28% 53°
ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 100° 97° Partly Cloudy WSW   10 19% 50°
ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 99° 97° Clear 3%

0% Thunder
( 1% severe)
WSW   13 23% 55°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 88° 86° Clear WSW   9 34% 56°
Tuesday
25 AUG 2026
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 81° 81° Clear 1%

0% Thunder
( 0% severe)
WSW   1 44% 57°
Low 74° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 77° 79° Clear   CALM 54% 59°
High 104° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 75° 75° Clear 0%

0% Thunder
( 0% severe)
  CALM 58% 59°

Clear



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 79° 80° Partly Cloudy   CALM 50% 59°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 92° 91° Clear 0%

0% Thunder
( 4% severe)
SW   3 31% 57°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 101° 100° Clear WSW   10 22% 55°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 100° 99° Clear 0%

0% Thunder
( 2% severe)
WSW   14 24% 57°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 91° 89° Clear WSW   8 31% 56°

ONTARIO, CA extended weather forecast

Wednesday
26 AUG 2026
Thursday
27 AUG 2026
Friday
28 AUG 2026
Saturday
29 AUG 2026
Sunday
30 AUG 2026
Low 74° Low 72° Low 71° Low 73° Low 68°
High 105° High 101° High 103° High 102° 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
Clear
Partly Cloudy
8% Rain
Partly Cloudy
1% Rain
Clear
3% Rain
Clear
3% Rain
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