Weather forecast for 10 daysCupertino, CA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 90°F
  • 55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphNNE 17°
  • Humidity: 31%
  • UV index: 5
  • Sunrise: 7:18 am PDT
  • Sunset: 6:28 pm PDT
  • ▼
On Saturday, October 17, conditions remain stable and sunny, with little cloud presence.
The daytime temperature will peak at a humid 89.6°F, significantly contrasting with the night's low of a refreshing 55.4°F.
Forecasts show a high closer to September's climate pattern, around 77.5°F, rather than October's 71.6°F.
Sunrise was at 7:18 am and sunset will be at 6:28 pm; the daylight will last for 11h and 10min.

Sunday Oct 18, 2026

  • 75°F
  • 52°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 11mphNNW 342°
  • Humidity: 57%
  • UV index: 5
  • Sunrise: 7:19 am PDT
  • Sunset: 6:27 pm PDT
  • ▼
Tomorrow, in Cupertino, bright and sunny weather is also expected.
Temperatures are forecasted to peak at a moderately hot 75.2°F and drop to a minimum of a fresh 51.8°F.
The anticipated maximum temperature will closely reflect October's average high of 71.6°F.
Sunrise will be at 7:19 am and sunset at 6:27 pm; tomorrow's daylight will last for 11h and 8min.

10-day overview

Daily temperatures

Warmest day: today 90°C.
Coldest day: Thursday 64°C.

Chance of precipitation

Highest chance: Wednesday 49%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 90°F
  • 55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphNNE 17°
  • Humidity: 31%
  • UV index: 5
  • Sunrise: 7:18 am PDT
  • Sunset: 6:28 pm PDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 75°F
  • 52°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 11mphNNW 342°
  • Humidity: 57%
  • UV index: 5
  • Sunrise: 7:19 am PDT
  • Sunset: 6:27 pm PDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 66°F
  • 52°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 11mphNW 321°
  • Humidity: 61%
  • UV index: 5
  • Sunrise: 7:20 am PDT
  • Sunset: 6:25 pm PDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 54°F
Cloudy
Cloudy
  • Precip. probability: 23%
  • Precipitation: 0.08"
  • Wind: 6mphNE 54°
  • Humidity: 63%
  • UV index: 3
  • Sunrise: 7:21 am PDT
  • Sunset: 6:24 pm PDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 66°F
  • 54°F
Showers
Showers
  • Precip. probability: 49%
  • Precipitation: 0.16"
  • Wind: 6mphNE 49°
  • Humidity: 70%
  • UV index: 3
  • Sunrise: 7:22 am PDT
  • Sunset: 6:23 pm PDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 64°F
  • 52°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 9mphNW 322°
  • Humidity: 79%
  • UV index: 4
  • Sunrise: 7:23 am PDT
  • Sunset: 6:21 pm PDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 9mphNNW 338°
  • Humidity: 71%
  • UV index: 5
  • Sunrise: 7:24 am PDT
  • Sunset: 6:20 pm PDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 70°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 9mphN 9°
  • Humidity: 63%
  • UV index: 5
  • Sunrise: 7:25 am PDT
  • Sunset: 6:19 pm PDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 70°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 9mphWNW 295°
  • Humidity: 61%
  • UV index: 4
  • Sunrise: 7:26 am PDT
  • Sunset: 6:18 pm PDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 70°F
  • 48°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 16%
  • Precipitation: 0"
  • Wind: 9mphNNE 18°
  • Humidity: 53%
  • UV index: 4
  • Sunrise: 7:27 am PDT
  • Sunset: 6:17 pm PDT
  • ▼
Looking ahead, conditions suggest a period of overcast, dry and sunny and wet weather is expected.
Rainfall is expected on Tuesday and Wednesday.
Temperature fluctuation will be noticeable in the upcoming period. Maximum temperatures are forecasted between 64.4°F and 89.6°F, while the forecast minimum temperature falls between 48.2°F and 55.4°F.
The hottest day is today, with a maximum temperature of 89.6°F; with the highest temperature of 64.4°F, Thursday will be the coldest day.
Updated: Oct 17, 2026 @ 15:06:45 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, in Cupertino, conditions remain stable and sunny, with little cloud presence.

Today, the maximum temperature will be 89.6°F, while the minimum temperature will be 55.4°F.
The highest temperature will be significantly higher than the average maximum of 71.6°F in October. The lowest temperature will be in line with the average low of 53.8°F.

On Saturday, in Cupertino, sunrise was at 7:18 am and sunset will be at 6:28 pm (PDT).

In Cupertino, the length of the day today will be 11h and 10min.

On Sunday, clear and sunny conditions are expected.

Tomorrow, the highest temperature will be 75.2°F, while the lowest temperature will be 51.8°F.
The maximum temperature tomorrow will be in line with the average highest temperature in October. The lowest temperature tomorrow will be also in line with the average low temperature.

On Sunday, in Cupertino, sunrise will be at 7:19 am and sunset at 6:27 pm (PDT).

Tomorrow, the daylight will last for 11h and 8min.