Weather forecast for 10 daysSaint Helena, CA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 82°F
- 46°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 8mphSW 225°
- Humidity: 44%
- UV index: 5
- Sunrise: 7:22 am PDT
- Sunset: 6:27 pm PDT
- details ▼
On Sunday, in Saint Helena, bright and sunny weather is expected.
Dramatic changes in temperature are anticipated, reaching a high of a temperate 82.4°F and falling to a low of a chilly 46.4°F.
The maximum heat index, which indicates how humid air affects the felt temperature, is calculated to be 82.4°F.
Weather conditions lean warmer, with the temperature tracking September's average high of 85.3°F.
Sunrise will be at 7:22 am and sunset at 6:27 pm; the daylight will last for 11h and 5min.
Dramatic changes in temperature are anticipated, reaching a high of a temperate 82.4°F and falling to a low of a chilly 46.4°F.
The maximum heat index, which indicates how humid air affects the felt temperature, is calculated to be 82.4°F.
Weather conditions lean warmer, with the temperature tracking September's average high of 85.3°F.
Sunrise will be at 7:22 am and sunset at 6:27 pm; the daylight will last for 11h and 5min.
10-day overview
Daily temperatures
Warmest day: today 82°C.
Coldest day: Wednesday 68°C.
Coldest day: Wednesday 68°C.
Chance of precipitation
Highest chance: Wednesday 44%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 82°F
- 46°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 8mphSW 225°
- Humidity: 44%
- UV index: 5
- Sunrise: 7:22 am PDT
- Sunset: 6:27 pm PDT
- details ▼
- Monday
- Oct 19, 2026
- 70°F
- 45°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 8mphWSW 238°
- Humidity: 62%
- UV index: 5
- Sunrise: 7:23 am PDT
- Sunset: 6:26 pm PDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 50°F
Mostly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 4mphE 89°
- Humidity: 57%
- UV index: 3
- Sunrise: 7:24 am PDT
- Sunset: 6:24 pm PDT
- details ▼
- Wednesday
- Oct 21, 2026
- 68°F
- 50°F
Showers
- Precip. probability: 44%
- Precipitation: 0.08"
- Wind: 4mphS 188°
- Humidity: 69%
- UV index: 2
- Sunrise: 7:25 am PDT
- Sunset: 6:23 pm PDT
- details ▼
- Thursday
- Oct 22, 2026
- 70°F
- 46°F
AM Showers
- Precip. probability: 33%
- Precipitation: 0.12"
- Wind: 6mphSW 228°
- Humidity: 74%
- UV index: 4
- Sunrise: 7:26 am PDT
- Sunset: 6:22 pm PDT
- details ▼
- Friday
- Oct 23, 2026
- 75°F
- 45°F
Partly Cloudy
- Precip. probability: 13%
- Precipitation: 0.04"
- Wind: 5mphENE 59°
- Humidity: 63%
- UV index: 4
- Sunrise: 7:27 am PDT
- Sunset: 6:20 pm PDT
- details ▼
- Saturday
- Oct 24, 2026
- 73°F
- 45°F
Mostly Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphS 191°
- Humidity: 56%
- UV index: 4
- Sunrise: 7:28 am PDT
- Sunset: 6:19 pm PDT
- details ▼
- Sunday
- Oct 25, 2026
- 70°F
- 43°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0.04"
- Wind: 7mphWSW 240°
- Humidity: 54%
- UV index: 4
- Sunrise: 7:29 am PDT
- Sunset: 6:18 pm PDT
- details ▼
- Monday
- Oct 26, 2026
- 70°F
- 43°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 5mphS 180°
- Humidity: 55%
- UV index: 4
- Sunrise: 7:30 am PDT
- Sunset: 6:17 pm PDT
- details ▼
- Tuesday
- Oct 27, 2026
- 72°F
- 41°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 5mphS 183°
- Humidity: 53%
- UV index: 4
- Sunrise: 7:31 am PDT
- Sunset: 6:15 pm PDT
- details ▼
Models point to a combination of overcast, sun-filled and wet weather is predicted.
Rainfall is expected on Wednesday through Friday and next Sunday.
There will be a considerable variation in temperature throughout the forecast window. Highs will range from 68°F to 82.4°F, while the low temperature range extends from 41°F to 50°F.
With a high of 82.4°F, today is the warmest day; expect the coldest day on Wednesday with a high of 68°F.
Rainfall is expected on Wednesday through Friday and next Sunday.
There will be a considerable variation in temperature throughout the forecast window. Highs will range from 68°F to 82.4°F, while the low temperature range extends from 41°F to 50°F.
With a high of 82.4°F, today is the warmest day; expect the coldest day on Wednesday with a high of 68°F.
Updated: Oct 18, 2026 @ 09:24:14 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
On Sunday, in Saint Helena, clear skies and sunshine are anticipated.
Today, the maximum temperature will be 82.4°F, while the minimum temperature will be 46.4°F. The maximum heat index, which represents the influence of relative humidity on air temperature, is calculated to be 82.4°F.
Today, the highest temperature will be a few degrees higher than the average maximum temperature in October. The lowest temperature will be also a couple of degrees lower than the average low of 50.9°F.
Today, the highest temperature will be a few degrees higher than the average maximum temperature in October. The lowest temperature will be also a couple of degrees lower than the average low of 50.9°F.
On Sunday, in Saint Helena, sunrise will be at 7:22 am and sunset at 6:27 pm (PDT).
In Saint Helena, today, there will be 11h and 5min of daylight.
