Live Weather & Forecast
Weather in Rancho Cucamonga
California, United States · Real-time conditions & 3-day outlook
14°C
Feels like 13°C
57°F / Feels 56°F
Partly cloudy
Rancho Cucamonga, California
🌞 Daytime
Updated: 2026-04-13 13:00
Humidity
69%
Wind
10.8 km/h SSW
Wind Gust
12.4 km/h
Pressure
1018 mb
Visibility
16 km
UV Index
5.7
(Moderate)
Precipitation
0.01 mm
Cloud Cover
75%
Dew Point
9.7°C
Wind Degree
206°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
213.9 μg/m³
NO₂
21.5 μg/m³
O₃
75 μg/m³
SO₂
7.1 μg/m³
PM 2.5
8.5 μg/m³
PM 10
9.6 μg/m³
Weather Alerts 1
Met
· Moderate · Expected
Winter Weather Advisory issued April 13 at 12:17AM PDT until April 13 at 7:00PM PDT by NWS Los Angeles/Oxnard CA
* WHAT...Wet snow expected. Total snow accumulations up to around 6 inches above 6000 feet. Winds gusting as high as 45 mph. * WHERE...Eastern San Gabriel Mountains, Interstate 5 Corridor, and Western San Gabriel Mountains and Highway 14 Corridor. * WHEN...Until 7 PM PDT this evening. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning and even...
Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Today's Hourly Forecast
24-hour breakdown for Rancho Cucamonga, California
12 AM
10°
Clear
1 AM
11°
Patchy rain nearby
2 AM
11°
Patchy rain nearby
3 AM
10°
Clear
4 AM
10°
Mist
5 AM
10°
Clear
6 AM
10°
Clear
7 AM
11°
Patchy rain nearby
8 AM
11°
Sunny
9 AM
12°
Partly Cloudy
10 AM
12°
Patchy rain nearby
11 AM
13°
Patchy rain nearby
12 PM
14°
Patchy rain nearby
1 PM
14°
Partly cloudy
2 PM
14°
Overcast
3 PM
15°
Light drizzle
4 PM
16°
Partly Cloudy
5 PM
16°
Partly Cloudy
6 PM
15°
Partly Cloudy
7 PM
14°
Sunny
8 PM
13°
Clear
9 PM
12°
Clear
10 PM
11°
Clear
11 PM
11°
Cloudy
3-Day Forecast
Daily overview for Rancho Cucamonga, California
Today
Patchy rain nearby
16°
/
9°
🌧️ 83% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 17.6 km/h
🌧️ Total precip: 0.84 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:21 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
19°
/
10°
🌧️ 0% chance of rain
💧 Avg. humidity: 69%
💨 Max wind: 15.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:20 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Sunny
21°
/
11°
🌧️ 0% chance of rain
💧 Avg. humidity: 67%
💨 Max wind: 16.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Rancho Cucamonga
Plan your trip to Rancho Cucamonga, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Rancho Cucamonga?
Current conditions in Rancho Cucamonga: Partly cloudy, temperature 14°C, humidity 69%.
What is the best time to visit Rancho Cucamonga?
The best time to visit Rancho Cucamonga is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Rancho Cucamonga?
Rancho Cucamonga is located at approximately 34.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Rancho Cucamonga?
The wettest period in Rancho Cucamonga is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Rancho Cucamonga?
For visits to Rancho Cucamonga during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Rancho Cucamonga in?
Rancho Cucamonga is located in United States, in the state of California.
What are the public holidays in Rancho Cucamonga in 2026?
View the 2026 public holidays for Rancho Cucamonga on our Holidays page.
What are the GPS coordinates used for the weather forecast in Rancho Cucamonga?
The weather forecast for Rancho Cucamonga uses coordinates 34.1033, -117.5752.