California · NWS LOX office

Simi Valley, CA weather

It is 63°F at Simi Valley - Cochran as of Oct 27, 8:00 PM PDT. Tonight: Patchy Fog, low near 48°F. Forecast from the National Weather Service, issued Oct 27, 9:17 PM PDT.

Updated Oct 27, 11:17 PM PDT (snapshot)

Current conditions

Temperature

63°F

Patchy Fog

Wind

SW 2 mph

Humidity 75% · dew point 55°F

Pressure · visibility

29.97 inHg

Visibility —

Observed at Simi Valley - Cochran (SV), Oct 27, 8:00 PM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Simi Valley forecast zone right now.

Around the NWS LOX forecast area

1 active alert covers zones served by the LOX office near Simi Valley:

  • Coastal Flood Advisory

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Simi Valley (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM55°FPatchy Fog0%NE 5 mph
Wed 12 AM53°FPatchy Fog0%NE 5 mph
Wed 1 AM52°FPatchy Fog0%NE 5 mph
Wed 2 AM53°FPatchy Fog0% 0 mph
Wed 3 AM52°FPatchy Fog0% 0 mph
Wed 4 AM50°FPatchy Fog0% 0 mph
Wed 5 AM50°FPatchy Fog0%NE 5 mph
Wed 6 AM48°FPatchy Fog0%NE 5 mph
Wed 7 AM48°FPatchy Fog0%NE 5 mph
Wed 8 AM54°FPatchy Fog0%ENE 5 mph
Wed 9 AM57°FPatchy Fog0%ENE 5 mph
Wed 10 AM61°FPatchy Fog0%ENE 5 mph
Wed 11 AM65°FMostly Sunny0%S 5 mph
Wed 12 PM69°FMostly Sunny0%S 5 mph
Wed 1 PM72°FMostly Sunny0%S 5 mph
Wed 2 PM76°FMostly Sunny0%SW 5 mph
Wed 3 PM74°FMostly Sunny0%SW 5 mph
Wed 4 PM69°FMostly Sunny0%SW 5 mph
Wed 5 PM63°FMostly Sunny0%SSW 5 mph
Wed 6 PM58°FPartly Cloudy0%SSW 5 mph
Wed 7 PM56°FPartly Cloudy0%SSW 5 mph
Wed 8 PM56°FPartly Cloudy0% 0 mph
Wed 9 PM53°FPartly Cloudy0% 0 mph
Wed 10 PM53°FPartly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Simi Valley can differ.

7-day forecast

Tonight

Low 48°F

Patchy fog. Cloudy, with a low around 48. Northeast wind 0 to 5 mph.

Wednesday

High 76°F·Low 49°F

Patchy fog before 11am. Partly sunny, with a high near 76. South southeast wind around 5 mph.

Wednesday Night: Mostly cloudy, with a low around 49. West wind 0 to 5 mph.

Thursday

High 73°F·Low 51°F

Partly sunny, with a high near 73. South southeast wind 0 to 10 mph.

Thursday Night: Mostly cloudy, with a low around 51. South wind 0 to 10 mph.

Friday

High 70°F·Low 53°F

Partly sunny, with a high near 70.

Friday Night: Mostly cloudy, with a low around 53.

Saturday

High 66°F·Low 52°F

A chance of rain showers after 11am. Mostly cloudy, with a high near 66.

Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 52.

Sunday

High 69°F·Low 51°F

A chance of rain showers before 4pm. Mostly sunny, with a high near 69.

Sunday Night: Mostly clear, with a low around 51.

Monday

High 73°F·Low 54°F

Sunny, with a high near 73.

Monday Night: Mostly clear, with a low around 54.

Tuesday

High 73°F

Mostly sunny, with a high near 73.

Nearby cities

Larger cities in the area

Other cities in Ventura County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Simi Valley is served by the National Weather Service LOX forecast office, forecast zone CAZ374, county zone CAC111.
Location used
The Census Bureau's internal point for Simi Valley (34.2669, -118.7485), in Ventura County. Population: 125,778 (2024 estimate), number 48 of the 296 California cities on this site.
Radar
Nearest NWS radar: KVTX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/34.2669,-118.7485 (forecast issued Oct 27, 9:17 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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