Live Weather & Forecast
Weather in Alta Loma
California, United States · Real-time conditions & 3-day outlook
14°C
Feels like 14°C
58°F / Feels 57°F
Partly cloudy
Alta Loma, California
🌞 Daytime
Updated: 2026-04-13 11:30
Humidity
55%
Wind
7.9 km/h SSW
Wind Gust
9.8 km/h
Pressure
1018 mb
Visibility
11 km
UV Index
4.6
(Moderate)
Precipitation
0.03 mm
Cloud Cover
75%
Dew Point
9.9°C
Wind Degree
193°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
176.9 μg/m³
NO₂
11 μg/m³
O₃
100 μg/m³
SO₂
6.4 μg/m³
PM 2.5
7.9 μg/m³
PM 10
9.7 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 Alta Loma, California
12 AM
10°
Clear
1 AM
11°
Patchy rain nearby
2 AM
10°
Patchy rain nearby
3 AM
10°
Clear
4 AM
10°
Fog
5 AM
9°
Clear
6 AM
10°
Clear
7 AM
10°
Patchy rain nearby
8 AM
11°
Sunny
9 AM
11°
Sunny
10 AM
11°
Patchy rain nearby
11 AM
14°
Partly cloudy
12 PM
13°
Patchy rain nearby
1 PM
14°
Patchy rain nearby
2 PM
14°
Overcast
3 PM
15°
Light drizzle
4 PM
15°
Partly Cloudy
5 PM
15°
Cloudy
6 PM
15°
Partly Cloudy
7 PM
14°
Sunny
8 PM
12°
Clear
9 PM
11°
Clear
10 PM
11°
Clear
11 PM
11°
Cloudy
3-Day Forecast
Daily overview for Alta Loma, California
Today
Patchy rain nearby
16°
/
9°
🌧️ 82% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 16.9 km/h
🌧️ Total precip: 0.8 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:21 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
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
20°
/
8°
🌧️ 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 Alta Loma
Plan your trip to Alta Loma, 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 Alta Loma?
Current conditions in Alta Loma: Partly cloudy, temperature 14°C, humidity 55%.
What is the best time to visit Alta Loma?
The best time to visit Alta Loma is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Alta Loma?
Alta Loma is located at approximately 34.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Alta Loma?
The wettest period in Alta Loma is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Alta Loma?
For visits to Alta Loma during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Alta Loma in?
Alta Loma is located in United States, in the state of California.
What are the public holidays in Alta Loma in 2026?
View the 2026 public holidays for Alta Loma on our Holidays page.
What are the GPS coordinates used for the weather forecast in Alta Loma?
The weather forecast for Alta Loma uses coordinates 34.1229, -117.5986.