Hourly Weather Forecast for Rancho Cucamonga, California 91739 - The Weather Channel | Weather.com

Advertisement

Advertisement

Advertisement

Advertisement

Hourly Weather-

As of 10:26 am PDT

Heat Advisory

Monday, March 16

11 am

Mostly Sunny

88°

0%

NNE 16 mph

Mostly Sunny

Feels Like88°
WindNNE 16 mph
Humidity12%
UV Index5 of 11
Cloud Cover21%
Rain Amount0 in

12 pm

Partly Cloudy

89°

0%

NNE 15 mph

Partly Cloudy

Feels Like89°
WindNNE 15 mph
Humidity12%
UV Index6 of 11
Cloud Cover40%
Rain Amount0 in

1 pm

Partly Cloudy

90°

0%

NNE 16 mph

Partly Cloudy

Feels Like90°
WindNNE 16 mph
Humidity12%
UV Index7 of 11
Cloud Cover43%
Rain Amount0 in

2 pm

Partly Cloudy

90°

0%

NNE 13 mph

Partly Cloudy

Feels Like90°
WindNNE 13 mph
Humidity13%
UV Index6 of 11
Cloud Cover53%
Rain Amount0 in

3 pm

Partly Cloudy

90°

0%

NNE 11 mph

Partly Cloudy

Feels Like90°
WindNNE 11 mph
Humidity13%
UV Index4 of 11
Cloud Cover52%
Rain Amount0 in

4 pm

Partly Cloudy

90°

0%

NNE 11 mph

Partly Cloudy

Feels Like90°
WindNNE 11 mph
Humidity13%
UV Index3 of 11
Cloud Cover48%
Rain Amount0 in

Advertisement

5 pm

Partly Cloudy

90°

0%

NNE 10 mph

Partly Cloudy

Feels Like90°
WindNNE 10 mph
Humidity14%
UV Index1 of 11
Cloud Cover46%
Rain Amount0 in

6 pm

Partly Cloudy

89°

0%

NNE 8 mph

Partly Cloudy

Feels Like89°
WindNNE 8 mph
Humidity15%
UV Index0 of 11
Cloud Cover39%
Rain Amount0 in

7 pm

Partly Cloudy

83°

0%

NNW 6 mph

Partly Cloudy

Feels Like83°
WindNNW 6 mph
Humidity20%
UV Index0 of 11
Cloud Cover48%
Rain Amount0 in

8 pm

Partly Cloudy

80°

0%

NW 6 mph

Partly Cloudy

Feels Like80°
WindNW 6 mph
Humidity23%
UV Index0 of 11
Cloud Cover32%
Rain Amount0 in

9 pm

Mostly Clear

78°

0%

NNW 6 mph

Mostly Clear

Feels Like78°
WindNNW 6 mph
Humidity24%
UV Index0 of 11
Cloud Cover28%
Rain Amount0 in

10 pm

Mostly Clear

76°

0%

NNW 5 mph

Mostly Clear

Feels Like76°
WindNNW 5 mph
Humidity26%
UV Index0 of 11
Cloud Cover20%
Rain Amount0 in

11 pm

Mostly Clear

75°

0%

N 5 mph

Mostly Clear

Feels Like75°
WindN 5 mph
Humidity27%
UV Index0 of 11
Cloud Cover25%
Rain Amount0 in

Tuesday, March 17

12 am

Mostly Clear

73°

0%

N 5 mph

Mostly Clear

Feels Like73°
WindN 5 mph
Humidity29%
UV Index0 of 11
Cloud Cover25%
Rain Amount0 in

1 am

Partly Cloudy

73°

0%

N 6 mph

Partly Cloudy

Feels Like73°
WindN 6 mph
Humidity28%
UV Index0 of 11
Cloud Cover32%
Rain Amount0 in

2 am

Mostly Clear

72°

0%

N 7 mph

Mostly Clear

Feels Like72°
WindN 7 mph
Humidity29%
UV Index0 of 11
Cloud Cover27%
Rain Amount0 in

3 am

Partly Cloudy

73°

0%

N 7 mph

Partly Cloudy

Feels Like73°
WindN 7 mph
Humidity27%
UV Index0 of 11
Cloud Cover33%
Rain Amount0 in

4 am

Partly Cloudy

73°

0%

N 7 mph

Partly Cloudy

Feels Like73°
WindN 7 mph
Humidity27%
UV Index0 of 11
Cloud Cover32%
Rain Amount0 in

Advertisement

5 am

Partly Cloudy

74°

0%

N 8 mph

Partly Cloudy

Feels Like74°
WindN 8 mph
Humidity25%
UV Index0 of 11
Cloud Cover35%
Rain Amount0 in

6 am

Partly Cloudy

74°

0%

N 8 mph

Partly Cloudy

Feels Like74°
WindN 8 mph
Humidity25%
UV Index0 of 11
Cloud Cover45%
Rain Amount0 in

7 am

Partly Cloudy

75°

0%

N 11 mph

Partly Cloudy

Feels Like75°
WindN 11 mph
Humidity24%
UV Index0 of 11
Cloud Cover47%
Rain Amount0 in

8 am

Mostly Sunny

77°

0%

N 11 mph

Mostly Sunny

Feels Like77°
WindN 11 mph
Humidity23%
UV Index0 of 11
Cloud Cover28%
Rain Amount0 in

9 am

Mostly Sunny

81°

0%

NNE 11 mph

Mostly Sunny

Feels Like81°
WindNNE 11 mph
Humidity21%
UV Index1 of 11
Cloud Cover22%
Rain Amount0 in

10 am

Sunny

86°

0%

NNE 11 mph

Sunny

Feels Like86°
WindNNE 11 mph
Humidity19%
UV Index3 of 11
Cloud Cover7%
Rain Amount0 in

11 am

Sunny

89°

0%

NNE 11 mph

Sunny

Feels Like89°
WindNNE 11 mph
Humidity16%
UV Index5 of 11
Cloud Cover4%
Rain Amount0 in

12 pm

Sunny

92°

0%

NNE 10 mph

Sunny

Feels Like92°
WindNNE 10 mph
Humidity15%
UV Index6 of 11
Cloud Cover1%
Rain Amount0 in

1 pm

Sunny

94°

0%

NNE 8 mph

Sunny

Feels Like94°
WindNNE 8 mph
Humidity14%
UV Index7 of 11
Cloud Cover6%
Rain Amount0 in

2 pm

Mostly Sunny

95°

0%

NNE 6 mph

Mostly Sunny

Feels Like95°
WindNNE 6 mph
Humidity13%
UV Index6 of 11
Cloud Cover22%
Rain Amount0 in

3 pm

Mostly Sunny

96°

0%

NNW 6 mph

Mostly Sunny

Feels Like96°
WindNNW 6 mph
Humidity13%
UV Index5 of 11
Cloud Cover29%
Rain Amount0 in

4 pm

Partly Cloudy

96°

0%

WNW 5 mph

Partly Cloudy

Feels Like96°
WindWNW 5 mph
Humidity13%
UV Index3 of 11
Cloud Cover38%
Rain Amount0 in

Advertisement

5 pm

Mostly Sunny

94°

0%

WSW 9 mph

Mostly Sunny

Feels Like94°
WindWSW 9 mph
Humidity14%
UV Index1 of 11
Cloud Cover22%
Rain Amount0 in

6 pm

Mostly Sunny

92°

0%

WSW 9 mph

Mostly Sunny

Feels Like92°
WindWSW 9 mph
Humidity16%
UV Index0 of 11
Cloud Cover21%
Rain Amount0 in

7 pm

Clear

86°

0%

W 7 mph

Clear

Feels Like86°
WindW 7 mph
Humidity19%
UV Index0 of 11
Cloud Cover4%
Rain Amount0 in

8 pm

Mostly Clear

82°

0%

W 4 mph

Mostly Clear

Feels Like82°
WindW 4 mph
Humidity24%
UV Index0 of 11
Cloud Cover21%
Rain Amount0 in

9 pm

Mostly Clear

79°

0%

NNW 4 mph

Mostly Clear

Feels Like79°
WindNNW 4 mph
Humidity27%
UV Index0 of 11
Cloud Cover20%
Rain Amount0 in

10 pm

Clear

77°

0%

NNE 3 mph

Clear

Feels Like77°
WindNNE 3 mph
Humidity30%
UV Index0 of 11
Cloud Cover9%
Rain Amount0 in

11 pm

Clear

75°

0%

NE 3 mph

Clear

Feels Like75°
WindNE 3 mph
Humidity31%
UV Index0 of 11
Cloud Cover7%
Rain Amount0 in

Wednesday, March 18

12 am

Clear

74°

0%

NE 3 mph

Clear

Feels Like74°
WindNE 3 mph
Humidity32%
UV Index0 of 11
Cloud Cover6%
Rain Amount0 in

1 am

Mostly Clear

73°

0%

NNE 3 mph

Mostly Clear

Feels Like73°
WindNNE 3 mph
Humidity32%
UV Index0 of 11
Cloud Cover24%
Rain Amount0 in

2 am

Clear

72°

0%

NNE 3 mph

Clear

Feels Like72°
WindNNE 3 mph
Humidity32%
UV Index0 of 11
Cloud Cover3%
Rain Amount0 in

3 am

Clear

71°

0%

NNE 3 mph

Clear

Feels Like71°
WindNNE 3 mph
Humidity33%
UV Index0 of 11
Cloud Cover8%
Rain Amount0 in

4 am

Clear

69°

0%

N 3 mph

Clear

Feels Like69°
WindN 3 mph
Humidity34%
UV Index0 of 11
Cloud Cover9%
Rain Amount0 in

Advertisement

5 am

Clear

69°

0%

NNE 3 mph

Clear

Feels Like69°
WindNNE 3 mph
Humidity34%
UV Index0 of 11
Cloud Cover7%
Rain Amount0 in

6 am

Clear

68°

0%

N 3 mph

Clear

Feels Like68°
WindN 3 mph
Humidity34%
UV Index0 of 11
Cloud Cover3%
Rain Amount0 in

7 am

Sunny

69°

0%

NNE 4 mph

Sunny

Feels Like69°
WindNNE 4 mph
Humidity34%
UV Index0 of 11
Cloud Cover1%
Rain Amount0 in

8 am

Sunny

73°

0%

NNE 3 mph

Sunny

Feels Like73°
WindNNE 3 mph
Humidity30%
UV Index0 of 11
Cloud Cover0%
Rain Amount0 in

9 am

Sunny

78°

0%

NE 2 mph

Sunny

Feels Like78°
WindNE 2 mph
Humidity26%
UV Index1 of 11
Cloud Cover0%
Rain Amount0 in

10 am

Sunny

83°

0%

SE 2 mph

Sunny

Feels Like83°
WindSE 2 mph
Humidity23%
UV Index3 of 11
Cloud Cover3%
Rain Amount0 in

Advertisement

Radar

© 2026 Mapbox © OpenStreetMap|Improve this map

Lonely Planet

7 Top Hikes In Kyoto For Scenic Views And Cultural Encounters

10 Of The Best Places For Stargazing In The USA

16 Of The Best Things To Do In London

The Best Time To Visit Europe

Advertisement

Advertisement

Don't Miss

Another Severe Weather Outbreak With Widespread Damaging Winds, Tornadoes In East Today

Dangerous Winds, Possible Tornadoes Spark Mounting Travel Delays As Severe Storms March East

A Major Winter Storm Is Bringing Blizzard Conditions And Record Snow

Traveling? See Live Airport Delays, Jet Stream Map And Destination Conditions

Advertisement

We Love Our Critters

Why Frogs Croak Faster In Warm Water: A Survival Strategy

Retreat! Penguins’ Instant Regret After Jumping On Ice Floe

Newly Identified Tick-Borne Bacterium In US Dogs

Hibernating Bears Wake Up From Winter

Travel

And The Best State For An Adventure Vacation Is ...

California Wildflower Superblooms Are Back In 2026

3 Big Changes Coming To National Parks In 2026

‘Rare And Remarkable’: Lake Superior Ice Caves Reopen

Seasonal Hub

Leaves Increasing On Trees In The South, Pollen On The Rise

When Are The Average Last Freezes In The US?

Allergy Season Grows Longer – Especially In These Places

Record Warmth Is Almost Tripling Record Cold This Year

Advertisement