ONTARIO, CA 91758 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

1:53 PM PDT MAY 24, 2026
Scattered Clouds
72°F
Feels Like: 72°F
Dewpoint: 54°F
Rel. Hum.: 53%
Visibility: 10 miles
Wind: W at 7 mph
Pressure: 29.99 inches
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ONTARIO, CA 91758
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy this evening...becoming cloudy. Patchy fog overnight. Lows 49 to 55. Areas of winds west 10 to 15 mph with gusts to 25 mph...becoming to 10 mph overnight.
MEMORIAL DAY
Mostly cloudy with patchy fog in the morning... Becoming partly cloudy. Highs 75 to 81. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
MONDAY NIGHT
Partly cloudy in the evening, then cloudy with patchy fog and drizzle overnight. Lows 49 to 54. Areas of winds west 10 to 15 mph. Gusts to 25 mph in the evening.
TUESDAY
Cloudy with patchy drizzle in the morning, then partly cloudy in the afternoon. Patchy fog. Highs 69 to 75. Areas of winds southwest 10 to 15 mph. Gusts to 25 mph in the afternoon.
TUESDAY NIGHT
Partly cloudy in the evening, then cloudy with patchy drizzle overnight. Patchy fog. Lows 47 to 53. Areas of winds south 10 to 15 mph. Gusts to 25 mph in the evening.
WEDNESDAY
Cloudy with patchy drizzle in the morning, then mostly cloudy in the afternoon. Patchy fog. Highs 65 to 72.
WEDNESDAY NIGHT
Partly cloudy with a slight chance of showers. Lows 46 to 52.
THURSDAY
Partly cloudy. Highs 67 to 72.
THURSDAY NIGHT
Mostly clear. Lows 46 to 52.
FRIDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 74 to 79.
FRIDAY NIGHT
Clear. Lows 49 to 55.
SATURDAY
Mostly sunny. Highs 79 to 85.
SATURDAY NIGHT
Clear. Lows 52 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  5/24/2026
Sunday
24 MAY 2026
ONTARIO, CA 91758 weather forecast Day 1, 12 hours 11 AM 68° 68° Partly Cloudy 0%

0% Thunder
( 1% severe)
WSW   8 63% 55°
High 77° ONTARIO, CA 91758 weather forecast Day 1, 15 hours 2 PM 76° 78° Clear WSW   12 45% 53°
Clear



ONTARIO, CA 91758 weather forecast Day 1, 18 hours 5 PM 76° 78° Clear 0%

0% Thunder
( 1% severe)
WSW   14 46% 54°
ONTARIO, CA 91758 weather forecast Day 1, 21 hours 8 PM 68° 68° Clear WSW   13 61% 54°
Monday
25 MAY 2026
ONTARIO, CA 91758 weather forecast Day 2, 0 hours 11 PM 62° 61° Clear 0%

0% Thunder
( 0% severe)
W   10 78% 55°
Low 56° ONTARIO, CA 91758 weather forecast Day 2, 3 hours 2 AM 59° 59° Partly Cloudy W   5 87% 55°
High 78° ONTARIO, CA 91758 weather forecast Day 2, 6 hours 5 AM 57° 58° Mostly Cloudy 0%

0% Thunder
( 0% severe)
  CALM 93% 55°

Decreasing Clouds



ONTARIO, CA 91758 weather forecast Day 2, 9 hours 8 AM 59° 60° Mostly Cloudy   CALM 93% 57°
ONTARIO, CA 91758 weather forecast Day 2, 12 hours 11 AM 66° 66° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   7 68% 55°
ONTARIO, CA 91758 weather forecast Day 2, 15 hours 2 PM 75° 75° Clear WSW   13 46% 53°
ONTARIO, CA 91758 weather forecast Day 2, 18 hours 5 PM 73° 73° Clear 0%

0% Thunder
( 0% severe)
WSW   14 49% 53°
ONTARIO, CA 91758 weather forecast Day 2, 21 hours 8 PM 66° 66° Clear WSW   13 63% 53°
Tuesday
26 MAY 2026
ONTARIO, CA 91758 weather forecast Day 3, 0 hours 11 PM 61° 60° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   9 81% 55°
Low 55° ONTARIO, CA 91758 weather forecast Day 3, 3 hours 2 AM 58° 57° Mostly Cloudy WSW   7 90% 55°
High 73° ONTARIO, CA 91758 weather forecast Day 3, 6 hours 5 AM 57° 57° Mostly Cloudy 0%

0% Thunder
( 1% severe)
SSW   3 96% 56°

Mostly Cloudy



ONTARIO, CA 91758 weather forecast Day 3, 9 hours 8 AM 58° 59° Mostly Cloudy   CALM 96% 57°
ONTARIO, CA 91758 weather forecast Day 3, 15 hours 11 AM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   7 75% 55°
ONTARIO, CA 91758 weather forecast Day 3, 18 hours 2 PM 69° 69° Partly Cloudy SW   13 57% 53°
ONTARIO, CA 91758 weather forecast Day 3, 21 hours 5 PM 68° 68° Partly Cloudy     SW   14 57% 52°

ONTARIO, CA extended weather forecast

Wednesday
27 MAY 2026
Thursday
28 MAY 2026
Friday
29 MAY 2026
Saturday
30 MAY 2026
Sunday
31 MAY 2026
Low 57° Low 55° Low 57° Low 57° Low 61°
High 69° High 74° High 79° High 83° High 87°
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
28% Rain
Partly Cloudy
31% Rain
Partly Cloudy
11% Rain
Partly Cloudy
4% Rain
Partly Cloudy
4% Rain
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