ALTA LOMA, CA 91737 Weather Forecast & Current Conditions

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ONTARIO, CA
Current Weather

2:53 AM PDT MAY 21, 2025
Clear
66°F
Feels Like: 66°F
Dewpoint: 52°F
Rel. Hum.: 61%
Visibility: 10 miles
Wind: Calm
Pressure: 29.89 inches
Last 72 hours

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ALTA LOMA, CA 91737
Weather Forecast

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Snow Depth pages
TODAY
Mostly sunny. Highs 94 to 99. Light winds becoming southwest 10 to 15 mph with gusts to 25 mph this afternoon.
TONIGHT
Mostly clear. Lows 55 to 62. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
THURSDAY
Mostly sunny. Highs 91 to 96. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon.
THURSDAY NIGHT
Mostly clear. Lows 54 to 60. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
FRIDAY
Mostly sunny. Highs 84 to 90. Areas of winds south 10 to 20 mph. Gusts to 30 mph in the afternoon.
FRIDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 49 to 57.
SATURDAY
Partly cloudy with patchy fog in the morning... Becoming mostly sunny. Highs 81 to 86.
SATURDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 52 to 58.
SUNDAY
Partly cloudy with patchy fog in the morning...becoming mostly sunny. Highs 84 to 90.
SUNDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 54 to 60.
MEMORIAL DAY
Patchy fog in the morning. Partly cloudy. Highs 84 to 89.
MONDAY NIGHT
Mostly clear in the evening...becoming partly cloudy overnight with patchy fog. Lows 54 to 60.
TUESDAY
Patchy fog in the morning. Partly cloudy. Highs 83 to 87.

Visible Weather Satellite
ALTA LOMA, CA 91737
Infrared Weather Satellite
ALTA LOMA, CA 91737
NEXRAD Weather Radar
ALTA LOMA, CA 91737

ONTARIO, CA 3 hourly weather forecast

weather forecast created  5:00 PM PDT  5/20/2025
Wednesday
21 MAY 2025
ALTA LOMA, CA 91737 weather forecast Day 1, 0 hours 11 PM 71° 71° Clear 0%

0% Thunder
( 0% severe)
WSW   3 47% 50°
Low 63° ALTA LOMA, CA 91737 weather forecast Day 1, 3 hours 2 AM 67° 67° Clear NE   2 52% 49°
High 93° ALTA LOMA, CA 91737 weather forecast Day 1, 6 hours 5 AM 64° 66° Clear 0%

0% Thunder
( 0% severe)
NE   2 56% 48°

Clear



ALTA LOMA, CA 91737 weather forecast Day 1, 9 hours 8 AM 71° 71° Clear   CALM 44% 48°
ALTA LOMA, CA 91737 weather forecast Day 1, 12 hours 11 AM 83° 81° Clear 0%

0% Thunder
( 0% severe)
SW   3 26% 45°
ALTA LOMA, CA 91737 weather forecast Day 1, 15 hours 2 PM 91° 87° Clear WSW   9 19% 43°
ALTA LOMA, CA 91737 weather forecast Day 1, 18 hours 5 PM 89° 85° Clear 0%

0% Thunder
( 0% severe)
WSW   13 21% 44°
ALTA LOMA, CA 91737 weather forecast Day 1, 21 hours 8 PM 79° 79° Clear WSW   9 31% 46°
Thursday
22 MAY 2025
ALTA LOMA, CA 91737 weather forecast Day 2, 0 hours 11 PM 70° 70° Clear 0%

0% Thunder
( 0% severe)
WSW   3 47% 49°
Low 62° ALTA LOMA, CA 91737 weather forecast Day 2, 3 hours 2 AM 66° 66° Partly Cloudy N   2 52% 48°
High 89° ALTA LOMA, CA 91737 weather forecast Day 2, 6 hours 5 AM 63° 64° Partly Cloudy 0%

0% Thunder
( 0% severe)
ENE   1 58% 48°

Partly Cloudy



ALTA LOMA, CA 91737 weather forecast Day 2, 9 hours 8 AM 69° 69° Partly Cloudy   CALM 47% 48°
ALTA LOMA, CA 91737 weather forecast Day 2, 12 hours 11 AM 80° 79° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   6 30% 46°
ALTA LOMA, CA 91737 weather forecast Day 2, 15 hours 2 PM 87° 84° Partly Cloudy WSW   12 24% 46°
ALTA LOMA, CA 91737 weather forecast Day 2, 18 hours 5 PM 86° 83° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   14 25% 46°
ALTA LOMA, CA 91737 weather forecast Day 2, 21 hours 8 PM 76° 78° Partly Cloudy WSW   9 36% 47°

ONTARIO, CA extended weather forecast

Friday
23 MAY 2025
Saturday
24 MAY 2025
Sunday
25 MAY 2025
Monday
26 MAY 2025
Tuesday
27 MAY 2025
Low 59° Low 59° Low 57° Low 59° Low 58°
High 82° High 78° High 81° High 83° High 80°
ALTA LOMA, CA 91737 weather forecast Day 3 ALTA LOMA, CA 91737 weather forecast Day 4 ALTA LOMA, CA 91737 weather forecast Day 5 ALTA LOMA, CA 91737 weather forecast Day 6 ALTA LOMA, CA 91737 weather forecast Day 7
Partly Cloudy
2% Rain
Partly Cloudy
6% Rain
Partly Cloudy
2% Rain
Partly Cloudy
2% Rain
Partly Cloudy
4% Rain
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