RIALTO, CA 92377 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

9:53 PM PDT OCT 18, 2025
Clear
70°F
Feels Like: 70°F
Dewpoint: 46°F
Rel. Hum.: 42%
Visibility: 10 miles
Wind: Calm
Pressure: 30.02 inches
Last 72 hours

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RIALTO, CA 92377
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear this evening...becoming partly cloudy. Lows 53 to 58. Areas of winds east to 10 mph.
SUNDAY
Partly cloudy in the morning...becoming mostly sunny. Highs 80 to 85. Light winds becoming west to 10 mph in the afternoon.
SUNDAY NIGHT
Partly cloudy in the evening...becoming mostly clear. Lows 52 to 56. Light winds.
MONDAY
Mostly sunny. Highs 82 to 88. Light winds.
MONDAY NIGHT
Clear. Lows 54 to 59. Areas of winds east to 10 mph.
TUESDAY
Mostly sunny. Highs 82 to 87.
TUESDAY NIGHT
Mostly clear in the evening, then partly cloudy with patchy fog and drizzle overnight. Lows 50 to 55.
WEDNESDAY
Patchy fog in the morning. Partly cloudy with patchy drizzle in the morning, then mostly sunny in the afternoon. Cooler. Highs 67 to 73.
WEDNESDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 47 to 52.
THURSDAY
Partly cloudy in the morning...becoming mostly sunny. Warmer. Highs 76 to 81.
THURSDAY NIGHT
Mostly clear. Lows 53 to 56.
FRIDAY
Mostly sunny. Highs 79 to 85.
FRIDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 52 to 56.

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 PM PDT 10/18/2025
Sunday
19 OCT 2025
RIALTO, CA 92377 weather forecast Day 1, 0 hours 11 PM 67° 67° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   6 43% 44°
Low 60° RIALTO, CA 92377 weather forecast Day 1, 3 hours 2 AM 64° 64° Partly Cloudy NE   6 48% 44°
High 84° RIALTO, CA 92377 weather forecast Day 1, 6 hours 5 AM 61° 61° Partly Cloudy 0%

0% Thunder
( 0% severe)
NE   5 51% 43°

Partly Cloudy



RIALTO, CA 92377 weather forecast Day 1, 9 hours 8 AM 62° 63° Partly Cloudy NE   3 50% 43°
RIALTO, CA 92377 weather forecast Day 1, 12 hours 11 AM 74° 74° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SSW   1 32% 42°
RIALTO, CA 92377 weather forecast Day 1, 15 hours 2 PM 82° 80° Partly Cloudy WSW   5 22% 40°
RIALTO, CA 92377 weather forecast Day 1, 18 hours 5 PM 81° 80° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   8 27% 44°
RIALTO, CA 92377 weather forecast Day 1, 21 hours 8 PM 70° 70° Partly Cloudy WSW   3 45% 48°
Monday
20 OCT 2025
RIALTO, CA 92377 weather forecast Day 2, 0 hours 11 PM 65° 65° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   3 56% 49°
Low 56° RIALTO, CA 92377 weather forecast Day 2, 3 hours 2 AM 61° 62° Partly Cloudy NE   3 62% 48°
High 85° RIALTO, CA 92377 weather forecast Day 2, 6 hours 5 AM 59° 59° Clear 0%

0% Thunder
( 0% severe)
NE   5 62% 46°

Clear



RIALTO, CA 92377 weather forecast Day 2, 9 hours 8 AM 60° 61° Clear NE   3 60% 46°
RIALTO, CA 92377 weather forecast Day 2, 12 hours 11 AM 73° 73° Clear 0%

0% Thunder
( 0% severe)
S   1 34% 43°
RIALTO, CA 92377 weather forecast Day 2, 15 hours 2 PM 83° 81° Clear WSW   2 20% 38°
RIALTO, CA 92377 weather forecast Day 2, 18 hours 5 PM 83° 81° Clear 0%

0% Thunder
( 0% severe)
WSW   5 23% 41°
RIALTO, CA 92377 weather forecast Day 2, 21 hours 8 PM 72° 72° Clear WNW   3 37% 44°

ONTARIO, CA extended weather forecast

BAD DAY
BAD DATE
BAD DAY
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BAD DAY
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Low 55° Low 58° Low 57° Low 52° Low 56°
High 86° High 81° High 73° High 82° High 85°
RIALTO, CA 92377 weather forecast Day 3 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
Clear
1% Rain
Mostly Cloudy
2% Rain
Overcast
22% Rain
Clear
9% Rain
Clear
5% Rain
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