ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

11:53 PM PDT SEP 14, 2025
Clear
66°F
Feels Like: 66°F
Dewpoint: 61°F
Rel. Hum.: 84%
Visibility: 10 miles
Wind: SW at 3 mph
Pressure: 29.87 inches
Last 72 hours

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ONTARIO, CA 91758
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. Lows 59 to 64. Areas of winds west to 10 mph this evening becoming light.
MONDAY
Mostly sunny. Highs 92 to 98. Light winds becoming southwest 10 to 15 mph with gusts to 25 mph in the afternoon.
MONDAY NIGHT
Mostly clear. Lows 63 to 68. Areas of winds west to 10 mph in the evening becoming light.
TUESDAY
Mostly sunny. Highs 94 to 100. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows 65 to 69. Areas of winds west 10 mph in the evening becoming light.
WEDNESDAY
Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs 92 to 97.
WEDNESDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms overnight. Lows 66 to 70.
THURSDAY
Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Highs 88 to 94.
THURSDAY NIGHT
Partly cloudy with a slight chance of showers and thunderstorms. Lows 64 to 69.
FRIDAY
Mostly cloudy in the morning...becoming partly cloudy. A chance of showers and a slight chance of thunderstorms. Highs 87 to 93.
FRIDAY NIGHT
A slight chance of thunderstorms in the evening. Partly cloudy with a slight chance of showers. Lows 63 to 68.
SATURDAY
Partly cloudy with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs 86 to 93.
SATURDAY NIGHT
Mostly clear. Lows 60 to 65.

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  9/14/2025
Monday
15 SEP 2025
ONTARIO, CA 91758 weather forecast Day 1, 0 hours 11 PM 70° 70° Clear 0%

0% Thunder
( 0% severe)
W   5 71% 60°
Low 64° ONTARIO, CA 91758 weather forecast Day 1, 3 hours 2 AM 67° 67° Partly Cloudy W   2 75% 59°
High 95° ONTARIO, CA 91758 weather forecast Day 1, 6 hours 5 AM 65° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   2 81% 59°

Partly Cloudy



ONTARIO, CA 91758 weather forecast Day 1, 9 hours 8 AM 68° 68° Partly Cloudy ENE   2 76% 60°
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 82° 82° Clear 0%

0% Thunder
( 0% severe)
SSW   1 41% 56°
ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 93° 90° Clear WSW   7 24% 51°
ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 92° 90° Clear 0%

0% Thunder
( 0% severe)
W   12 28% 54°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 81° 81° Clear WSW   6 42% 56°
Tuesday
16 SEP 2025
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 75° 75° Clear 0%

0% Thunder
( 0% severe)
W   5 54% 57°
Low 69° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 72° 72° Clear E   3 59% 57°
High 97° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 70° 70° Clear 0%

0% Thunder
( 1% severe)
NE   3 63% 57°

Clear



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 74° 74° Clear ENE   3 55% 57°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 87° 85° Clear 1%

0% Thunder
( 7% severe)
SW   1 34% 55°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 95° 93° Clear WSW   8 26% 55°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 93° 92° Clear 0%

0% Thunder
( 5% severe)
WSW   13 30% 57°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 83° 82° Clear WSW   8 38% 55°

ONTARIO, CA extended weather forecast

Wednesday
17 SEP 2025
Thursday
18 SEP 2025
Friday
19 SEP 2025
Saturday
20 SEP 2025
Sunday
21 SEP 2025
Low 69° Low 70° Low 70° Low 69° Low 70°
High 92° High 88° High 88° High 91° High 92°
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
3% Rain
Overcast
59% Rain
Overcast
69% Rain
Partly Cloudy
24% Rain
Partly Cloudy
12% Rain
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