Weather forecast for 10 daysWalnut, CA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 88°F
  • 66°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 8mphESE 122°
  • Humidity: 17%
  • UV index: 5
  • Sunrise: 6:58 am PDT
  • Sunset: 6:15 pm PDT
  • ▼
Today, in Walnut, widespread cloud cover will remain in place.
Temperature fluctuations between a hot 87.8°F and a comfortable 66.2°F are expected.
Weather conditions lean hotter, with the temperature tracking September's average high of 87.3°F.
Sunrise was at 6:58 am and sunset will be at 6:15 pm; the daylight will last for 11h and 17min.

Sunday Oct 18, 2026

  • 88°F
  • 63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphS 175°
  • Humidity: 27%
  • UV index: 6
  • Sunrise: 6:59 am PDT
  • Sunset: 6:13 pm PDT
  • ▼
Tomorrow, on Sunday, October 18, a partly cloudy sky is anticipated.
The temperature is expected to oscillate between a maximum of a humid 87.8°F and a minimum of a breezy 62.6°F.
Temperatures are higher than average, more in line with September's norm of 87.3°F than with October's 79.3°F.
Sunrise will be at 6:59 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 14min.

10-day overview

Daily temperatures

Warmest period: today - tomorrow 88°C.
Coldest day: Thursday 66°C.

Chance of precipitation

Highest chance: Thursday 84%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 88°F
  • 66°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 8mphESE 122°
  • Humidity: 17%
  • UV index: 5
  • Sunrise: 6:58 am PDT
  • Sunset: 6:15 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 88°F
  • 63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphS 175°
  • Humidity: 27%
  • UV index: 6
  • Sunrise: 6:59 am PDT
  • Sunset: 6:13 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 86°F
  • 61°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 9mphSSW 194°
  • Humidity: 40%
  • UV index: 6
  • Sunrise: 7:00 am PDT
  • Sunset: 6:12 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 81°F
  • 61°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 9mphSSW 193°
  • Humidity: 52%
  • UV index: 6
  • Sunrise: 7:00 am PDT
  • Sunset: 6:11 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 73°F
  • 59°F
Rain
Rain
  • Precip. probability: 63%
  • Precipitation: 0.47"
  • Wind: 8mphSSW 196°
  • Humidity: 64%
  • UV index: 5
  • Sunrise: 7:01 am PDT
  • Sunset: 6:10 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 66°F
  • 57°F
Thundershowers
Thundershowers
  • Precip. probability: 84%
  • Precipitation: 0.28"
  • Wind: 7mphSSW 200°
  • Humidity: 72%
  • UV index: 3
  • Sunrise: 7:02 am PDT
  • Sunset: 6:09 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 73°F
  • 57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 7mphS 189°
  • Humidity: 63%
  • UV index: 5
  • Sunrise: 7:03 am PDT
  • Sunset: 6:08 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 79°F
  • 57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 6mphSSW 212°
  • Humidity: 49%
  • UV index: 5
  • Sunrise: 7:04 am PDT
  • Sunset: 6:06 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 79°F
  • 57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 7mphS 190°
  • Humidity: 46%
  • UV index: 4
  • Sunrise: 7:05 am PDT
  • Sunset: 6:05 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 75°F
  • 57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 7mphSSW 193°
  • Humidity: 53%
  • UV index: 5
  • Sunrise: 7:05 am PDT
  • Sunset: 6:04 pm PDT
  • ▼
The weather will be unstable for the next ten days, and a mix of gloomy, dry and sunny, rainy and storm-filled weather is expected.
Rain is anticipated on Wednesday and Thursday.
There will be a considerable variation in temperature in the upcoming period. Forecast highs will fluctuate between 66.2°F and 87.8°F, while the minimum temperature is forecast to range between 57.2°F and 66.2°F.
Saturday and Sunday, with the highest temperature of 87.8°F, will be the hottest days; the lowest daytime temperature of the period will be reached on Thursday, peaking at 66.2°F.
Updated: Oct 17, 2026 @ 19:20:03 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, gray skies will define the day.

Today, the maximum temperature will be 87.8°F, while the minimum temperature will be 66.2°F.
The maximum temperature today will be moderately higher than the average highest temperature in October. The lowest temperature today will be also a few degrees higher than the average low temperature.

On Saturday, in Walnut, sunrise was at 6:58 am and sunset will be at 6:15 pm (PDT).

Today, the daylight will last for 11h and 17min.

On Sunday, a mix of clouds and blue sky is expected.

Tomorrow, the highest temperature will be 87.8°F, while the lowest temperature will be 62.6°F.
The highest temperature will be moderately higher than the average maximum of 79.3°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in Walnut, sunrise will be at 6:59 am and sunset at 6:13 pm (PDT).

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