Weather forecast for 10 daysCastaic, CA
Weather forecast for the weekend
Saturday Oct 17, 2026
- 86°F
- 59°F
Partly Cloudy / Wind
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 25mphENE 61°
- Humidity: 16%
- UV index: 6
- Sunrise: 7:01 am PDT
- Sunset: 6:17 pm PDT
- details ▼
On Saturday, October 17, breezy and partly cloudy conditions will persist throughout the day.
A stark contrast will be evident between the daytime peak temperature of a humid 86°F and the nighttime low of a mild 59°F.
Today, expect conditions that are hotter than normal, with a temperature that reflects September's typical maximum of 84.7°F.
Sunrise was at 7:01 am and sunset will be at 6:17 pm; the daylight will last for 11h and 16min.
A stark contrast will be evident between the daytime peak temperature of a humid 86°F and the nighttime low of a mild 59°F.
Today, expect conditions that are hotter than normal, with a temperature that reflects September's typical maximum of 84.7°F.
Sunrise was at 7:01 am and sunset will be at 6:17 pm; the daylight will last for 11h and 16min.
Sunday Oct 18, 2026
- 86°F
- 57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 14mphENE 70°
- Humidity: 25%
- UV index: 6
- Sunrise: 7:02 am PDT
- Sunset: 6:16 pm PDT
- details ▼
Tomorrow, in Castaic, skies will stay clear and sunny.
A substantial temperature fluctuation from a humid 86°F at its peak to a refreshing 57.2°F at its lowest point is predicted.
Tomorrow, the maximum temperature of 86°F will resemble September's climate more than October's.
Sunrise will be at 7:02 am and sunset at 6:16 pm; tomorrow's daylight will last for 11h and 14min.
A substantial temperature fluctuation from a humid 86°F at its peak to a refreshing 57.2°F at its lowest point is predicted.
Tomorrow, the maximum temperature of 86°F will resemble September's climate more than October's.
Sunrise will be at 7:02 am and sunset at 6:16 pm; tomorrow's daylight will last for 11h and 14min.
10-day overview
Daily temperatures
Warmest period: today - tomorrow 86°C.
Coldest day: Thursday 63°C.
Coldest day: Thursday 63°C.
Chance of precipitation
Highest chance: Wednesday 70%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- 86°F
- 59°F
Partly Cloudy / Wind
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 25mphENE 61°
- Humidity: 16%
- UV index: 6
- Sunrise: 7:01 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Sunday
- Oct 18, 2026
- 86°F
- 57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 14mphENE 70°
- Humidity: 25%
- UV index: 6
- Sunrise: 7:02 am PDT
- Sunset: 6:16 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 82°F
- 55°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 16mphS 178°
- Humidity: 32%
- UV index: 6
- Sunrise: 7:03 am PDT
- Sunset: 6:15 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 77°F
- 57°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 13mphSSE 150°
- Humidity: 44%
- UV index: 6
- Sunrise: 7:04 am PDT
- Sunset: 6:14 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 68°F
- 55°F
Rain
- Precip. probability: 70%
- Precipitation: 0.63"
- Wind: 11mphSE 129°
- Humidity: 62%
- UV index: 4
- Sunrise: 7:05 am PDT
- Sunset: 6:12 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 63°F
- 52°F
Thunderstorms
- Precip. probability: 67%
- Precipitation: 0.24"
- Wind: 11mphSE 141°
- Humidity: 77%
- UV index: 4
- Sunrise: 7:06 am PDT
- Sunset: 6:11 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 70°F
- 52°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 10mphESE 119°
- Humidity: 61%
- UV index: 5
- Sunrise: 7:07 am PDT
- Sunset: 6:10 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 75°F
- 55°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphE 91°
- Humidity: 49%
- UV index: 5
- Sunrise: 7:07 am PDT
- Sunset: 6:09 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 75°F
- 54°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0.08"
- Wind: 12mphE 98°
- Humidity: 46%
- UV index: 5
- Sunrise: 7:08 am PDT
- Sunset: 6:08 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 72°F
- 52°F
Mostly Sunny
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 12mphE 94°
- Humidity: 49%
- UV index: 5
- Sunrise: 7:09 am PDT
- Sunset: 6:07 pm PDT
- details ▼
An unsettled pattern is expected over the next ten days, and a mix of mostly clear, gloomy, rain-soaked and lightning-active weather is predicted.
Rainfall is anticipated on Wednesday and Thursday.
Noticeable swings in temperature are expected in the upcoming period. Maximum temperatures are forecasted between 62.6°F and 86°F, while nighttime temperatures are expected to vary from 51.8°F to 59°F.
Saturday and Sunday, with the highest temperature of 86°F, will be the hottest days in Castaic; expect the coldest day on Thursday with a high of 62.6°F.
Rainfall is anticipated on Wednesday and Thursday.
Noticeable swings in temperature are expected in the upcoming period. Maximum temperatures are forecasted between 62.6°F and 86°F, while nighttime temperatures are expected to vary from 51.8°F to 59°F.
Saturday and Sunday, with the highest temperature of 86°F, will be the hottest days in Castaic; expect the coldest day on Thursday with a high of 62.6°F.
Updated: Oct 17, 2026 @ 17:00:53 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Today, partly cloudy skies with gusty winds are expected.
Today, the highest temperature will be 86°F, while the lowest temperature will be 59°F.
The highest temperature will be noticeably higher than the average maximum of 76.6°F in October. The lowest temperature will be in line with the average low of 55.8°F.
The highest temperature will be noticeably higher than the average maximum of 76.6°F in October. The lowest temperature will be in line with the average low of 55.8°F.
On Saturday, in Castaic, sunrise was at 7:01 am and sunset will be at 6:17 pm (PDT).
Today in Castaic, the daylight will last for 11h and 16min.
On Sunday, sunny and dry conditions are anticipated.
Tomorrow, the highest temperature will be 86°F, while the lowest temperature will be 57.2°F.
The highest temperature tomorrow will be uncommonly higher than the average maximum of 76.6°F in October. The lowest temperature will be in line with the average low of 55.8°F.
The highest temperature tomorrow will be uncommonly higher than the average maximum of 76.6°F in October. The lowest temperature will be in line with the average low of 55.8°F.
On Sunday, in Castaic, sunrise will be at 7:02 am and sunset at 6:16 pm (PDT).
In Castaic, tomorrow, there will be 11h and 14min of daylight.





