ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

8:53 PM PDT OCT 19, 2026
Clear
73°F
Feels Like: 73°F
Dewpoint: 52°F
Rel. Hum.: 48%
Visibility: 10 miles
Wind: WSW at 6 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 56 to 61. Areas of winds east to 10 mph this evening becoming light.
TUESDAY
Mostly sunny. Highs 79 to 84. Light winds becoming south 10 to 15 mph in the afternoon.
TUESDAY NIGHT
Partly cloudy. Lows 54 to 59. Areas of winds south to 10 mph in the evening becoming light.
WEDNESDAY
Partly cloudy. A chance of showers in the afternoon. Highs 72 to 77. Light winds becoming southwest 10 to 15 mph with gusts to 25 mph in the afternoon. Chance of measurable precipitation 50 percent.
WEDNESDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers and a slight chance of thunderstorms overnight. Lows 52 to 57. Areas of winds south to 10 mph.
THURSDAY
Showers and a slight chance of thunderstorms. Highs 64 to 70.
THURSDAY NIGHT
Partly cloudy. A slight chance of showers in the evening. Lows 48 to 53.
FRIDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 69 to 74.
FRIDAY NIGHT
Clear. Lows 49 to 54.
SATURDAY
Sunny. Highs 74 to 80.
SATURDAY NIGHT
Mostly clear. Lows 52 to 56.
SUNDAY
Mostly sunny. Highs 76 to 81.
SUNDAY NIGHT
Mostly clear. Lows 53 to 57.

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 AM PDT 10/19/2026
Monday
19 OCT 2026
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 78° 78° Clear 1%

0% Thunder
( 0% severe)
  CALM 32% 46°
High 85° ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 84° 82° Clear SW   7 25% 44°
Clear



ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 82° 81° Clear 1%

0% Thunder
( 0% severe)
WSW   12 31% 48°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 73° 73° Clear WSW   6 51% 54°
Tuesday
20 OCT 2026
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 68° 68° Clear 1%

0% Thunder
( 0% severe)
NNE   6 63% 55°
Low 63° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 65° 65° Clear WNW   3 73% 56°
High 83° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 63° 64° Clear 2%

0% Thunder
( 0% severe)
  CALM 75% 55°

Clear



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 64° 66° Clear ENE   2 73% 55°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 75° 75° Clear 2%

0% Thunder
( 3% severe)
  CALM 43% 51°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 81° 80° Clear SW   6 33% 49°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 79° 79° Clear 1%

0% Thunder
( 3% severe)
WSW   12 42% 54°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 71° 71° Partly Cloudy WSW   7 61% 57°
Wednesday
21 OCT 2026
ONTARIO, CA 91758 weather forecast Day 3, 0 hours 11 PM 66° 66° Partly Cloudy 2%

0% Thunder
( 1% severe)
WSW   7 78% 59°
Low 61° ONTARIO, CA 91758 weather forecast Day 3, 3 hours 2 AM 63° 64° Partly Cloudy SSE   5 90% 60°
High 75° ONTARIO, CA 91758 weather forecast Day 3, 6 hours 5 AM 62° 63° Partly Cloudy 6%

0% Thunder
( 1% severe)
SW   2 93% 60°

Partly Cloudy

Rain Likely

ONTARIO, CA 91758 weather forecast Day 3, 9 hours 8 AM 63° 64° Partly Cloudy S   5 93% 61°
ONTARIO, CA 91758 weather forecast Day 3, 15 hours 11 AM 69° 69° Partly Cloudy 56%
RAIN
***
0% Thunder
( 6% severe)
SSE   5 68% 58°
ONTARIO, CA 91758 weather forecast Day 3, 18 hours 2 PM 72° 72° Partly Cloudy SW   10 55% 55°
ONTARIO, CA 91758 weather forecast Day 3, 21 hours 5 PM 68° 68° Mostly Cloudy     WSW   12 68% 57°

ONTARIO, CA extended weather forecast

Thursday
22 OCT 2026
Friday
23 OCT 2026
Saturday
24 OCT 2026
Sunday
25 OCT 2026
Monday
26 OCT 2026
Low 59° Low 53° Low 55° Low 57° Low 57°
High 71° High 77° High 87° High 91° High 89°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Mostly Cloudy
85% Rain
Clear
11% Rain
Clear
1% Rain
Clear
3% Rain
Clear
1% Rain
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