Live Weather & Forecast

Weather in San Dimas

California, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly cloudy
17°C
Feels like 17°C
63°F / Feels 63°F
Partly cloudy
San Dimas, California
🌞 Daytime
Updated: 2026-04-12 17:15
💧
Humidity
45%
💨
Wind
12.2 km/h WSW
🌬️
Wind Gust
16.8 km/h
🌡️
Pressure
1016 mb
👁️
Visibility
16 km
☀️
UV Index
0.9 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
75%
💦
Dew Point
5.6°C
🌐
Wind Degree
238°

Air Quality Index

US EPA: Moderate UK DEFRA: Low (2)
CO
270.9 μg/m³
NO₂
49.1 μg/m³
O₃
37 μg/m³
SO₂
14.2 μg/m³
PM 2.5
16.1 μg/m³
PM 10
18.2 μg/m³

Weather Alerts 2

Met · Moderate · Expected
Winter Weather Advisory issued April 12 at 12:40AM PDT until April 13 at 11:00AM 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 11 AM PDT Monday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday morning commute. Gust...

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.

Effective: 2026-04-12T00:40:00-07:00  ·  Expires: 2026-04-12T17:00:00-07:00
Met · Moderate · Expected
Wind Advisory issued April 12 at 12:39AM PDT until April 12 at 10:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. Isolated gusts to around 55 mph near Lake Palmdale. * WHERE...Eastern Antelope Valley Foothills and Western Antelope Valley Foothills. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Effective: 2026-04-12T00:39:00-07:00  ·  Expires: 2026-04-12T22:00:00-07:00

Today's Hourly Forecast

24-hour breakdown for San Dimas, California

12 AM
Cloudy
14°
Cloudy
💧 85% 💨 11.9 km/h
1 AM
Partly Cloudy
13°
Partly Cloudy
💧 79% 💨 11.9 km/h
2 AM
Clear
13°
Clear
💧 84% 💨 13 km/h
3 AM
Light rain
13°
Light rain
💧 91% 💨 14.4 km/h 🌧️ 100%
4 AM
Light rain
13°
Light rain
💧 94% 💨 13.7 km/h 🌧️ 100%
5 AM
Overcast
13°
Overcast
💧 88% 💨 10.8 km/h
6 AM
Cloudy
13°
Cloudy
💧 90% 💨 11.9 km/h
7 AM
Overcast
13°
Overcast
💧 90% 💨 13.3 km/h
8 AM
Overcast
13°
Overcast
💧 87% 💨 9.7 km/h
9 AM
Cloudy
14°
Cloudy
💧 84% 💨 11.9 km/h
10 AM
Patchy rain nearby
13°
Patchy rain nearby
💧 79% 💨 14 km/h 🌧️ 74%
11 AM
Light rain
14°
Light rain
💧 94% 💨 14.8 km/h 🌧️ 100%
12 PM
Patchy rain nearby
15°
Patchy rain nearby
💧 87% 💨 14.8 km/h 🌧️ 62%
1 PM
Sunny
15°
Sunny
💧 80% 💨 13.3 km/h
2 PM
Cloudy
15°
Cloudy
💧 73% 💨 11.2 km/h
3 PM
Patchy rain nearby
16°
Patchy rain nearby
💧 74% 💨 9.7 km/h 🌧️ 60%
4 PM
Sunny
16°
Sunny
💧 58% 💨 12.2 km/h
5 PM
Partly cloudy
17°
Partly cloudy
💧 45% 💨 12.2 km/h
6 PM
Sunny
16°
Sunny
💧 52% 💨 14.8 km/h
7 PM
Sunny
14°
Sunny
💧 65% 💨 13.7 km/h
8 PM
Clear
13°
Clear
💧 74% 💨 11.5 km/h
9 PM
Overcast
12°
Overcast
💧 82% 💨 10.1 km/h
10 PM
Partly Cloudy
12°
Partly Cloudy
💧 87% 💨 9 km/h
11 PM
Partly Cloudy
12°
Partly Cloudy
💧 86% 💨 7.9 km/h

3-Day Forecast

Daily overview for San Dimas, California

Today
Patchy rain nearby
Patchy rain nearby
17° / 12°
🌧️ 81% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 14.8 km/h
🌧️ Total precip: 3.78 mm
☀️ UV Index: 0.4
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:21 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
Patchy rain nearby
15° / 9°
🌧️ 79% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 22.3 km/h
🌧️ Total precip: 2.44 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
Sunny
19° / 9°
🌧️ 0% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit San Dimas

Plan your trip to San Dimas, 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.
← Back to San Dimas 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in San Dimas?
Current conditions in San Dimas: Partly cloudy, temperature 17°C, humidity 45%.
What is the best time to visit San Dimas?
The best time to visit San Dimas is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in San Dimas?
San Dimas is located at approximately 34.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in San Dimas?
The wettest period in San Dimas is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to San Dimas?
For visits to San Dimas during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is San Dimas in?
San Dimas is located in United States, in the state of California.
What are the public holidays in San Dimas in 2026?
View the 2026 public holidays for San Dimas on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Dimas?
The weather forecast for San Dimas uses coordinates 34.1065, -117.8069.