Live Weather & Forecast

Weather in Simi Valley

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

Flag of United States
Partly cloudy
19°C
Feels like 19°C
67°F / Feels 67°F
Partly cloudy
Simi Valley, California
🌞 Daytime
Updated: 2026-04-12 15:15
💧
Humidity
39%
💨
Wind
26.6 km/h WSW
🌬️
Wind Gust
30.6 km/h
🌡️
Pressure
1015 mb
👁️
Visibility
16 km
☀️
UV Index
5.1 (Moderate)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
75%
💦
Dew Point
6.1°C
🌐
Wind Degree
245°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
183.9 μg/m³
NO₂
13.3 μg/m³
O₃
68 μg/m³
SO₂
1.9 μg/m³
PM 2.5
6.3 μg/m³
PM 10
7.7 μg/m³

Weather Alerts 3

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 amounts up to around 6 inches above 6000 feet. Winds gusting as high as 40 mph. * WHERE...Northern Ventura County Mountains, Santa Barbara County Interior Mountains, and Southern Ventura County Mountains. * WHEN...Until 11 AM PDT Monday. * IMPACTS...The hazardous conditions could impact the Monday morning commute. * ADDITIONAL DETAILS...Snow levels will b...

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
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 Simi Valley, California

12 AM
Light rain
14°
Light rain
💧 91% 💨 7.9 km/h 🌧️ 100%
1 AM
Patchy rain nearby
14°
Patchy rain nearby
💧 88% 💨 8.3 km/h 🌧️ 100%
2 AM
Patchy light rain
13°
Patchy light rain
💧 87% 💨 9 km/h 🌧️ 100%
3 AM
Overcast
13°
Overcast
💧 90% 💨 10.4 km/h
4 AM
Cloudy
13°
Cloudy
💧 86% 💨 15.1 km/h
5 AM
Overcast
13°
Overcast
💧 86% 💨 11.5 km/h
6 AM
Patchy rain nearby
13°
Patchy rain nearby
💧 87% 💨 9 km/h 🌧️ 100%
7 AM
Moderate rain
12°
Moderate rain
💧 96% 💨 7.2 km/h 🌧️ 100%
8 AM
Moderate rain at times
13°
Moderate rain at times
💧 93% 💨 8.3 km/h 🌧️ 100%
9 AM
Patchy rain nearby
13°
Patchy rain nearby
💧 87% 💨 12.2 km/h 🌧️ 100%
10 AM
Patchy rain nearby
16°
Patchy rain nearby
💧 78% 💨 16.2 km/h 🌧️ 88%
11 AM
Sunny
17°
Sunny
💧 60% 💨 21.6 km/h
12 PM
Sunny
19°
Sunny
💧 56% 💨 25.2 km/h
1 PM
Sunny
20°
Sunny
💧 34% 💨 29.5 km/h
2 PM
Sunny
21°
Sunny
💧 33% 💨 27 km/h
3 PM
Partly cloudy
19°
Partly cloudy
💧 39% 💨 26.6 km/h
4 PM
Sunny
20°
Sunny
💧 41% 💨 25.2 km/h
5 PM
Sunny
20°
Sunny
💧 42% 💨 25.6 km/h
6 PM
Sunny
19°
Sunny
💧 50% 💨 23.4 km/h
7 PM
Sunny
16°
Sunny
💧 53% 💨 17.3 km/h
8 PM
Clear
14°
Clear
💧 67% 💨 10.4 km/h
9 PM
Clear
13°
Clear
💧 80% 💨 7.9 km/h
10 PM
Clear
12°
Clear
💧 81% 💨 6.8 km/h
11 PM
Clear
11°
Clear
💧 86% 💨 6.1 km/h

3-Day Forecast

Daily overview for Simi Valley, California

Today
Moderate rain
Moderate rain
22° / 11°
🌧️ 88% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 10.74 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:27 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Partly Cloudy
Partly Cloudy
17° / 9°
🌧️ 0% chance of rain
💧 Avg. humidity: 73%
💨 Max wind: 26.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:26 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
Sunny
23° / 6°
🌧️ 0% chance of rain
💧 Avg. humidity: 63%
💨 Max wind: 21.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:27 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Simi Valley

Plan your trip to Simi Valley, 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 Simi Valley 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Simi Valley?
Current conditions in Simi Valley: Partly cloudy, temperature 19°C, humidity 39%.
What is the best time to visit Simi Valley?
The best time to visit Simi Valley is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Simi Valley?
Simi Valley is located at approximately 34.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Simi Valley?
The wettest period in Simi Valley is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Simi Valley?
For visits to Simi Valley during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Simi Valley in?
Simi Valley is located in United States, in the state of California.
What are the public holidays in Simi Valley in 2026?
View the 2026 public holidays for Simi Valley on our Holidays page.
What are the GPS coordinates used for the weather forecast in Simi Valley?
The weather forecast for Simi Valley uses coordinates 34.2677, -118.7538.