RANCHO CUCAMONGA, CA 91739 Weather Forecast & Current Conditions

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91739 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
ONTARIO, CA Current Weather
12:53 AM PDT JUL 16, 2025
Broken Clouds 63°F
Feels Like:	63°F
Dewpoint:	59°F
Rel. Hum.:	87%
Visibility:	10 miles
Wind:	WSW at 6 mph
Pressure:	29.96 inches
Last 72 hours
Local Area Snow Depth
California Current Weather
California MOS Forecast Weather

Weather Map

(Automated weather data from NWS/FAA)

91739 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	RANCHO CUCAMONGA, CA 91739 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Mostly clear this evening...becoming partly cloudy. Patchy fog overnight. Lows 52 to 61. Areas of winds west 10 to 15 mph with gusts to 25 mph this evening becoming light.

WEDNESDAY
Partly cloudy with patchy fog in the morning... Becoming sunny. Highs 85 to 92. Areas of winds west to 10 mph... Becoming 10 to 15 mph with gusts to 25 mph in the afternoon.

WEDNESDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 54 to 62. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.

THURSDAY
Patchy fog in the morning. Mostly sunny. Highs 88 to 94. Areas of winds west to 10 mph...becoming 10 to 15 mph with gusts to 25 mph in the afternoon.

THURSDAY NIGHT
Partly cloudy. Patchy fog overnight. Lows 55 to 63. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.

FRIDAY
Partly cloudy. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Highs 87 to 94.

FRIDAY NIGHT
Mostly clear. Patchy fog overnight. Lows 56 to 63.

SATURDAY
Patchy fog in the morning. Mostly sunny. Highs 88 to 95.

SATURDAY NIGHT
Mostly clear. Lows 56 to 63.

SUNDAY
Patchy fog in the morning. Mostly sunny. Highs 90 to 97.

SUNDAY NIGHT
Mostly clear. Lows 55 to 63.

MONDAY
Patchy fog in the morning. Mostly sunny. Highs 89 to 96.

MONDAY NIGHT
Mostly clear in the evening...becoming partly cloudy. Lows 55 to 63.

91739 WEATHER SATELLITE LOOPS

Visible Weather Satellite
RANCHO CUCAMONGA, CA 91739

Infrared Weather Satellite
RANCHO CUCAMONGA, CA 91739

91739 WEATHER RADAR LOOP

NEXRAD Weather Radar
RANCHO CUCAMONGA, CA 91739

MOS COMPUTER WEATHER FORECAST

ONTARIO, CA 3 hourly weather forecast

weather forecast created 5:00 PM PDT 7/15/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
16 JUL 2025

11 PM

67°

67°

Clear

0%

0% Thunder
( 0% severe)

W 9

73%

58°

Low 61°

2 AM

63°

63°

Clear

WSW 6

84%

58°

High 87°

5 AM

62°

63°

Partly Cloudy

0%

0% Thunder
( 0% severe)

W 2

90%

59°

Partly Cloudy

8 AM

65°

65°

Partly Cloudy

SW 2

81%

59°

11 AM

74°

74°

Clear

1%

0% Thunder
( 0% severe)

SW 5

62%

60°

2 PM

84°

83°

Clear

WSW 10

41%

58°

5 PM

84°

83°

Clear

1%

0% Thunder
( 0% severe)

WSW 13

41%

58°

8 PM

75°

75°

Clear

WSW 12

55%

58°

Thursday
17 JUL 2025

11 PM

68°

68°

Clear

1%

0% Thunder
( 0% severe)

WSW 8

73%

59°

Low 63°

2 AM

65°

65°

Clear

WSW 5

81%

59°

High 89°

5 AM

63°

64°

Partly Cloudy

0%

0% Thunder
( 2% severe)

WSW 2

90%

60°

Partly Cloudy

8 AM

66°

66°

Partly Cloudy

SSW 2

81%

60°

11 AM

76°

78°

Partly Cloudy

4%

0% Thunder
( 5% severe)

SW 6

58%

60°

2 PM

86°

85°

Partly Cloudy

WSW 10

39%

58°

5 PM

86°

85°

Partly Cloudy

1%

0% Thunder
( 4% severe)

WSW 13

37%

57°

8 PM

76°

78°

Partly Cloudy

WSW 12

54%

58°


ONTARIO, CA extended weather forecast
BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE	BAD DAY BAD DATE
Low 66°	Low 66°	Low 65°	Low 66°	Low 66°
High 91°	High 90°	High 92°	High 92°	High 92°

Partly Cloudy	Partly Cloudy 4% Rain	Partly Cloudy 3% Rain	Partly Cloudy 1% Rain	Partly Cloudy 3% Rain

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