Weather forecast for 10 daysSimi Valley, CA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 91°F
  • 61°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 23mphNE 46°
  • Humidity: 17%
  • UV index: 5
  • Sunrise: 7:02 am PDT
  • Sunset: 6:18 pm PDT
  • ▼
Today, on Saturday, October 17, variable cloud cover will pair with strong breezes.
The day's temperature range will span from a high of a hot 91.4°F to a minimum of an enjoyable 60.8°F.
The forecast high of 91.4°F aligns more closely with September's typical high of 79.7°F than with October's usual 74.1°F.
Sunrise was at 7:02 am and sunset will be at 6:18 pm; the daylight will last for 11h and 16min.

Sunday Oct 18, 2026

  • 88°F
  • 59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphNNW 334°
  • Humidity: 28%
  • UV index: 6
  • Sunrise: 7:03 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
Tomorrow, on Sunday, October 18, clear skies and sunshine are also anticipated.
Temperatures will show considerable variation, extending from a high of a blazing 87.8°F to a low of a moderate 59°F.
Tomorrow, the maximum temperature of 87.8°F will resemble September's climate more than October's.
Sunrise will be at 7:03 am and sunset at 6:17 pm; tomorrow's daylight will last for 11h and 14min.

10-day overview

Daily temperatures

Warmest day: today 91°C.
Coldest day: Thursday 68°C.

Chance of precipitation

Highest chance: Thursday 70%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 91°F
  • 61°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 23mphNE 46°
  • Humidity: 17%
  • UV index: 5
  • Sunrise: 7:02 am PDT
  • Sunset: 6:18 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 88°F
  • 59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphNNW 334°
  • Humidity: 28%
  • UV index: 6
  • Sunrise: 7:03 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 82°F
  • 57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphS 185°
  • Humidity: 42%
  • UV index: 6
  • Sunrise: 7:03 am PDT
  • Sunset: 6:16 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 79°F
  • 59°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 9mphSSE 158°
  • Humidity: 51%
  • UV index: 6
  • Sunrise: 7:04 am PDT
  • Sunset: 6:14 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 70°F
  • 57°F
Rain
Rain
  • Precip. probability: 60%
  • Precipitation: 0.63"
  • Wind: 9mphESE 104°
  • Humidity: 64%
  • UV index: 4
  • Sunrise: 7:05 am PDT
  • Sunset: 6:13 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 68°F
  • 54°F
Thunderstorms
Thunderstorms
  • Precip. probability: 70%
  • Precipitation: 0.24"
  • Wind: 9mphSE 137°
  • Humidity: 76%
  • UV index: 2
  • Sunrise: 7:06 am PDT
  • Sunset: 6:12 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 72°F
  • 54°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 9mphSW 215°
  • Humidity: 66%
  • UV index: 5
  • Sunrise: 7:07 am PDT
  • Sunset: 6:11 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 77°F
  • 55°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 9mphENE 76°
  • Humidity: 54%
  • UV index: 5
  • Sunrise: 7:08 am PDT
  • Sunset: 6:10 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 79°F
  • 57°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 10mphESE 118°
  • Humidity: 48%
  • UV index: 4
  • Sunrise: 7:09 am PDT
  • Sunset: 6:09 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 75°F
  • 54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 10mphE 82°
  • Humidity: 48%
  • UV index: 5
  • Sunrise: 7:09 am PDT
  • Sunset: 6:08 pm PDT
  • ▼
Over the course of the next ten days, expect shifting weather, and a mix of overcast, sunny, rainy and storm-filled weather is expected.
Rainfall is expected on Wednesday and Thursday.
The temperature will vary considerably over the next several days. Forecast highs will fluctuate between 68°F and 91.4°F, while the lowest temperature will be between 53.6°F and 60.8°F.
With a high of 91.4°F, today is the hottest day; the lowest daytime temperature of the period will be reached on Thursday, peaking at 68°F.
Updated: Oct 17, 2026 @ 14:36:02 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, in Simi Valley, sun and clouds will mix with occasional strong winds.

Today, the maximum temperature will be 91.4°F, while the minimum temperature will be 60.8°F.
Today, the maximum temperature will be uncommonly higher than the average highest temperature of 74.1°F in October. Today, the lowest temperature will be in line with the average low temperature.

On Saturday, in Simi Valley, sunrise was at 7:02 am and sunset will be at 6:18 pm (PDT).

In Simi Valley, today, there will be 11h and 16min of daylight.

On Sunday, sun-filled conditions are expected to persist.

Tomorrow, the maximum temperature will be 87.8°F, while the minimum temperature will be 59°F.
Tomorrow, the highest temperature will be noticeably higher than the average maximum of 74.1°F in October. The lowest temperature will be in line with the average low of 57.6°F.

On Sunday, in Simi Valley, sunrise will be at 7:03 am and sunset at 6:17 pm (PDT).

In Simi Valley, tomorrow, there will be 11h and 14min of daylight.