Weather forecast for 10 daysO'Brien, CA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 84°F
  • 50°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 5mphSSE 151°
  • Humidity: 20%
  • UV index: 4
  • Sunrise: 7:23 am PDT
  • Sunset: 6:26 pm PDT
  • ▼
Today, in O'Brien, clear skies with only minor cloud interruptions are in the outlook.
A stark contrast will be evident between the daytime peak temperature of a warm 84.2°F and the nighttime low of a crisp 50°F.
Today, expect conditions that are hotter than normal, with a temperature that reflects September's typical maximum of 84°F.
Sunrise was at 7:23 am and sunset will be at 6:26 pm; the daylight will last for 11h and 3min.

Sunday Oct 18, 2026

  • 81°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSE 137°
  • Humidity: 30%
  • UV index: 4
  • Sunrise: 7:24 am PDT
  • Sunset: 6:24 pm PDT
  • ▼
Tomorrow, on Sunday, expect bright skies and plenty of sunshine.
The peak daytime temperature will touch a moderately hot 80.6°F, while the nighttime temperature will descend to a brisk 44.6°F.
The temperature of 80.6°F aligns more with what is typical in September than what is normal in October.
Sunrise will be at 7:24 am and sunset at 6:24 pm; tomorrow's daylight will last for 11h and 0min.

10-day overview

Daily temperatures

Warmest day: today 84°C.
Minimum temperature: 64°C.

Chance of precipitation

Highest chance: Sunday 25.10. 41%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 84°F
  • 50°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 5mphSSE 151°
  • Humidity: 20%
  • UV index: 4
  • Sunrise: 7:23 am PDT
  • Sunset: 6:26 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 81°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSE 137°
  • Humidity: 30%
  • UV index: 4
  • Sunrise: 7:24 am PDT
  • Sunset: 6:24 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 64°F
  • 45°F
Cloudy
Cloudy
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 5mphSW 214°
  • Humidity: 54%
  • UV index: 3
  • Sunrise: 7:25 am PDT
  • Sunset: 6:23 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 72°F
  • 46°F
Cloudy
Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 5mphNNE 27°
  • Humidity: 44%
  • UV index: 3
  • Sunrise: 7:26 am PDT
  • Sunset: 6:21 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 75°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphNNE 22°
  • Humidity: 41%
  • UV index: 4
  • Sunrise: 7:27 am PDT
  • Sunset: 6:20 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 66°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 22%
  • Precipitation: 0.04"
  • Wind: 7mphE 95°
  • Humidity: 67%
  • UV index: 4
  • Sunrise: 7:28 am PDT
  • Sunset: 6:18 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 7mphNNE 18°
  • Humidity: 58%
  • UV index: 4
  • Sunrise: 7:29 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 68°F
  • 41°F
Few Showers
Few Showers
  • Precip. probability: 33%
  • Precipitation: 0.28"
  • Wind: 6mphNE 53°
  • Humidity: 52%
  • UV index: 3
  • Sunrise: 7:30 am PDT
  • Sunset: 6:15 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 64°F
  • 39°F
Showers
Showers
  • Precip. probability: 41%
  • Precipitation: 0.43"
  • Wind: 6mphNNE 29°
  • Humidity: 57%
  • UV index: 4
  • Sunrise: 7:32 am PDT
  • Sunset: 6:14 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 66°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 23%
  • Precipitation: 0"
  • Wind: 6mphNNE 30°
  • Humidity: 48%
  • UV index: 4
  • Sunrise: 7:33 am PDT
  • Sunset: 6:13 pm PDT
  • ▼
For the next ten days, a combination of gloomy, clear and damp weather is forecasted.
Rainfall is forecasted for Thursday, next Saturday and Sunday.
Expect a substantial fluctuation in daytime highs in the next ten days. Forecast highs will fluctuate between 64.4°F and 84.2°F, while the lowest temperature will be between 39.2°F and 50°F.
Today is the hottest day, with a maximum temperature of 84.2°F; with a maximum temperature of 64.4°F, Monday and next Sunday will be the coldest days.
Updated: Oct 17, 2026 @ 17:06:15 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in O'Brien, sunshine will dominate, with only occasional cloud cover.

Today, the maximum temperature in O'Brien will be 84.2°F, while the minimum temperature will be 50°F.
The highest temperature will be significantly higher than the average maximum of 71.4°F in October. The lowest temperature today will be in line with the average low temperature.

On Saturday, in O'Brien, sunrise was at 7:23 am and sunset will be at 6:26 pm (PDT).

In O'Brien, the length of the day today will be 11h and 3min.

Tomorrow, in O'Brien, sunshine will likely continue with scattered clouds at most.

Tomorrow, the highest temperature in O'Brien will be 80.6°F, while the lowest temperature will be 44.6°F.
Tomorrow, the highest temperature will be noticeably higher than the average maximum of 71.4°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in O'Brien, sunrise will be at 7:24 am and sunset at 6:24 pm (PDT).

Tomorrow, the daylight will last for 11h and 0min.