RIALTO, CA 92377 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

2:53 PM PDT SEP 9, 2025
Clear
84°F
Feels Like: 82°F
Dewpoint: 48°F
Rel. Hum.: 29%
Visibility: 10 miles
Wind: WSW at 12 mph, gusts to 21
Pressure: 29.86 inches
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RIALTO, CA 92377
Weather Forecast

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Snow Depth pages
TONIGHT
Clear this evening...becoming partly cloudy. Lows 52 to 59. Areas of winds south 10 to 15 mph. Gusts to 25 mph this evening.
WEDNESDAY
Partly cloudy in the morning...becoming sunny. Highs 76 to 82. Areas of winds south 10 to 15 mph. Gusts to 25 mph in the afternoon.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 50 to 58. Areas of winds southwest 10 to 15 mph with gusts to 25 mph in the evening becoming light.
THURSDAY
Partly cloudy with patchy fog in the morning... Becoming mostly sunny. Highs 77 to 82. Light winds becoming southwest 10 to 15 mph with gusts to 25 mph in the afternoon.
THURSDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 50 to 57. Areas of winds southwest 10 to 15 mph in the evening becoming light.
FRIDAY
Patchy fog in the morning. Mostly sunny. Highs 79 to 85.
FRIDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 53 to 59.
SATURDAY
Patchy fog in the morning. Mostly sunny. Highs 83 to 88.
SATURDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 54 to 59.
SUNDAY
Patchy fog in the morning. Mostly sunny. Highs 82 to 88.
SUNDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 54 to 59.
MONDAY
Patchy fog in the morning. Mostly sunny. Highs 82 to 88.
MONDAY NIGHT
Mostly clear. Lows 55 to 60.

Visible Weather Satellite
RIALTO, CA 92377
Infrared Weather Satellite
RIALTO, CA 92377
NEXRAD Weather Radar
RIALTO, CA 92377

ONTARIO, CA 3 hourly weather forecast

weather forecast created  5:00 AM PDT  9/ 9/2025
Tuesday
9 SEP 2025
RIALTO, CA 92377 weather forecast Day 1, 12 hours 11 AM 75° 75° Clear 0%

0% Thunder
( 1% severe)
SW   5 48% 54°
High 85° RIALTO, CA 92377 weather forecast Day 1, 15 hours 2 PM 84° 82° Clear WSW   12 33% 52°
Clear



RIALTO, CA 92377 weather forecast Day 1, 18 hours 5 PM 82° 81° Clear 0%

0% Thunder
( 0% severe)
WSW   14 38% 54°
RIALTO, CA 92377 weather forecast Day 1, 21 hours 8 PM 73° 73° Clear WSW   12 57% 57°
Wednesday
10 SEP 2025
RIALTO, CA 92377 weather forecast Day 2, 0 hours 11 PM 67° 67° Partly Cloudy 2%

0% Thunder
( 0% severe)
WSW   9 73% 58°
Low 62° RIALTO, CA 92377 weather forecast Day 2, 3 hours 2 AM 65° 65° Partly Cloudy WSW   7 81% 59°
High 81° RIALTO, CA 92377 weather forecast Day 2, 6 hours 5 AM 64° 65° Mostly Cloudy 3%

0% Thunder
( 0% severe)
WSW   5 84% 59°

Decreasing Clouds



RIALTO, CA 92377 weather forecast Day 2, 9 hours 8 AM 63° 64° Mostly Cloudy SW   3 87% 59°
RIALTO, CA 92377 weather forecast Day 2, 12 hours 11 AM 70° 70° Clear 0%

0% Thunder
( 0% severe)
SSW   3 61% 56°
RIALTO, CA 92377 weather forecast Day 2, 15 hours 2 PM 78° 79° Clear SW   9 42% 53°
RIALTO, CA 92377 weather forecast Day 2, 18 hours 5 PM 77° 79° Clear 0%

0% Thunder
( 0% severe)
WSW   14 47% 55°
RIALTO, CA 92377 weather forecast Day 2, 21 hours 8 PM 69° 69° Clear WSW   12 63% 56°
Thursday
11 SEP 2025
RIALTO, CA 92377 weather forecast Day 3, 0 hours 11 PM 64° 64° Partly Cloudy 1%

0% Thunder
( 0% severe)
SW   9 81% 58°
Low 60° RIALTO, CA 92377 weather forecast Day 3, 3 hours 2 AM 63° 63° Partly Cloudy SW   6 84% 58°
High 81° RIALTO, CA 92377 weather forecast Day 3, 6 hours 5 AM 62° 63° Mostly Cloudy 2%

0% Thunder
( 0% severe)
SSW   3 87% 58°

Decreasing Clouds



RIALTO, CA 92377 weather forecast Day 3, 9 hours 8 AM 62° 63° Mostly Cloudy S   2 90% 59°
RIALTO, CA 92377 weather forecast Day 3, 15 hours 11 AM 69° 69° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSW   2 63% 56°
RIALTO, CA 92377 weather forecast Day 3, 18 hours 2 PM 78° 79° Clear SW   8 43% 54°
RIALTO, CA 92377 weather forecast Day 3, 21 hours 5 PM 77° 79° Clear     WSW   13 47% 55°

ONTARIO, CA extended weather forecast

Friday
12 SEP 2025
Saturday
13 SEP 2025
Sunday
14 SEP 2025
Monday
15 SEP 2025
Tuesday
16 SEP 2025
Low 62° Low 62° Low 62° Low 63° Low 61°
High 83° High 83° High 83° High 85° High 91°
RIALTO, CA 92377 weather forecast Day 4 RIALTO, CA 92377 weather forecast Day 5 RIALTO, CA 92377 weather forecast Day 6 RIALTO, CA 92377 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Clear
7% Rain
Partly Cloudy
3% Rain
Partly Cloudy
7% Rain
Clear
6% Rain
Clear
3% Rain
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