Simi Valley, CA Weather Forecast
Right now it is 69°F and mostly clear in Simi Valley (as of Sat, 2:00 AM PST). Saturday: high near 84°F. Tomorrow: sunny, high near 86°F. Official NWS forecast and alerts, refreshed every 30 minutes.
Current conditions
Measured at Simi Valley - Cochran (6 mi from the city center).
Weather tomorrow in Simi Valley
Sunny86°FSunny, with a high near 86. North wind 5 to 20 mph, with gusts as high as 25 mph.
Mostly Clear64°FMostly clear, with a low around 64. North wind 5 to 10 mph.
Weather alerts
1 active alertWind Advisory until Nov 7, 2:00 PM PST
Wind Advisory issued November 6 at 8:50PM PST until November 7 at 2:00PM PST by NWS Los Angeles/Oxnard CA
* WHAT...Northeast winds 15 to 25 mph with gusts of as high as 30 to 45 mph in the valleys and Malibu Coast. Winds of 20 to 30 mph with gusts as high as 45 to 55 mph in the mountains. * WHERE...Calabasas and Agoura Hills, Central Ventura County Valleys, Eastern Santa Monica Mountains Recreational Area, Malibu Coast, Santa Clarita Valley, Santa Susana Mountains, Southeastern Ventura County Valleys, Ventura County Inland Coast, Western San Gabriel Mountains and Highway 14 Corridor, and Western Santa Monica Mountains Recreational Area. * WHEN...From 2 AM to 2 PM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.
What to do: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
NWS Los Angeles/Oxnard CA · Severity: Moderate
7-day forecast
Mostly Clear65°FOvernight: Mostly clear, with a low around 65. Northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunny84°F / 66°FSunny, with a high near 84. North northeast wind 10 to 20 mph, with gusts as high as 30 mph. Saturday Night: Mostly clear, with a low around 66. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny86°F / 64°FSunny, with a high near 86. North wind 5 to 20 mph, with gusts as high as 25 mph. Sunday Night: Mostly clear, with a low around 64. North wind 5 to 10 mph.
Sunny85°F / 58°FSunny, with a high near 85. Monday Night: Mostly clear, with a low around 58.
Sunny84°F / 60°FSunny, with a high near 84. Tuesday Night: Clear, with a low around 60.
Sunny84°F / 59°FSunny, with a high near 84. Wednesday Night: Clear, with a low around 59.
Sunny then Slight Chance Light Rain
15% chance of rain/snow80°F / 56°FA slight chance of rain after 4pm. Sunny, with a high near 80. Thursday Night: A slight chance of rain before 10pm. Partly cloudy, with a low around 56.
Mostly Sunny then Slight Chance Light Rain 15% chance of rain/snow75°FA slight chance of rain after 4pm. Mostly sunny, with a high near 75.
Forecast issued by NWS forecast office LOX · updated Nov 7, 12:46 AM PST. Daytime highs and overnight lows are on the right.
Hourly forecast, radar & more on weather.gov
Nearby cities
Simi Valley population: 124,861 (U.S. Census Bureau, July 1, 2025 estimate). More California cities · All US cities
Source: National Weather Service / NOAA (public domain), fetched live. Tachlis is not affiliated with the NWS.
Questions & answers
What is the weather tomorrow in Simi Valley?
Sunday, November 8: Sunny, high near 86°F; night: mostly clear, low around 64°F.
Where does the Simi Valley forecast come from?
From the National Weather Service forecast office LOX, which writes the official forecast for Simi Valley's 2.5 km grid square. Current conditions come from the nearest NWS/FAA weather station.
How often is the Simi Valley weather updated?
This page fetches fresh data from the National Weather Service at most every 30 minutes, and checks for new watches and warnings every 5 minutes.
What time zone are the times shown in?
Local time for Simi Valley (America/Los Angeles).
Why can the current temperature differ from the forecast?
The current reading is a real measurement at a weather station, often at an airport, while the forecast describes the whole grid square around the city. Temperatures can differ by a few degrees across a city.