Weather forecast for tomorrowSaint Helena, CA
Weather forecast for tomorrow
Monday Oct 19, 2026
- 70°F
- 45°F
Mostly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 8mphWSW 239°
- Humidity: 62%
- UV index: 5
- Sunrise: 7:23 am PDT
- Sunset: 6:26 pm PDT
- details ▼
Tomorrow, on Monday, sunshine will be limited due to heavy cloud coverage.
Temperatures are anticipated to range from a maximum of an agreeable 69.8°F to a minimum of a frosty 44.6°F.
The anticipated top temperature is expected to be slightly cooler than the usual October maximum of 75°F.
Sunrise will be at 7:23 am and sunset at 6:26 pm; tomorrow's daylight will last for 11h and 3min.
Temperatures are anticipated to range from a maximum of an agreeable 69.8°F to a minimum of a frosty 44.6°F.
The anticipated top temperature is expected to be slightly cooler than the usual October maximum of 75°F.
Sunrise will be at 7:23 am and sunset at 6:26 pm; tomorrow's daylight will last for 11h and 3min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 68°C.
Coldest hour: 6 am 48°C.
Coldest hour: 6 am 48°C.
Chance of precipitation
Highest chance: 12 am 20%.
Hourly weather forecast
- 12 am
- 52°F
- Feels like:52°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 2mphWSW 250°
- Humidity: 94%
- Pressure: 29.94"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
- 2 am
- 50°F
- Feels like:50°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 2mphWSW 256°
- Humidity: 97%
- Pressure: 29.94"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 4 am
- 48°F
- Feels like:48°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0"
- Wind: 3mphW 261°
- Humidity: 96%
- Pressure: 29.94"Hg
- Visibility: 4mi
- UV index: 0
- details ▼
- 6 am
- 48°F
- Feels like:48°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 2mphWSW 250°
- Humidity: 95%
- Pressure: 29.94"Hg
- Visibility: 6mi
- UV index: 0
- details ▼
Sunrise: 7:23 am
- 8 am
- 46°F
- Feels like:46°F
Partly Cloudy
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 2mphW 260°
- Humidity: 97%
- Pressure: 29.94"Hg
- Visibility: 8mi
- UV index: 0
- details ▼
- 10 am
- 54°F
- Feels like:54°F
Mostly Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphW 266°
- Humidity: 77%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 61°F
- Feels like:61°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphWSW 241°
- Humidity: 55%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 66°F
- Feels like:66°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphSW 224°
- Humidity: 41%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 66°F
- Feels like:66°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphSW 228°
- Humidity: 40%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 63°F
- Feels like:61°F
Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSW 220°
- Humidity: 51%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:26 pm
- 8 pm
- 55°F
- Feels like:55°F
Cloudy
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 4mphSW 219°
- Humidity: 67%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 54°F
- Feels like:54°F
Cloudy
- Precip. probability: 14%
- Precipitation: 0"
- Wind: 2mphSW 221°
- Humidity: 78%
- Pressure: 29.85"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, a combination of overcast and bright weather is predicted.
The temperature will be between the lowest temperature of 46.4°F and the highest temperature of 68°F. The warmest part of the day is anticipated around 3 pm.
The forecasted high will be relatively lower than the typical October maximum of 75°F. The lowest temperature is more comparable to November's average minimum of 44.1°F than the usual minimum of 50.9°F in October.
The temperature will be between the lowest temperature of 46.4°F and the highest temperature of 68°F. The warmest part of the day is anticipated around 3 pm.
The forecasted high will be relatively lower than the typical October maximum of 75°F. The lowest temperature is more comparable to November's average minimum of 44.1°F than the usual minimum of 50.9°F in October.
Updated: Oct 18, 2026 @ 11:03:32 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 Monday, in Saint Helena, expect mainly cloudy weather with limited sun.
Tomorrow, the maximum temperature will be 69.8°F, while the minimum temperature will be 44.6°F.
The maximum temperature will be relatively lower than the average highest temperature of 75°F in October. The lowest temperature will be also slightly cooler than the average low of 50.9°F.
The maximum temperature will be relatively lower than the average highest temperature of 75°F in October. The lowest temperature will be also slightly cooler than the average low of 50.9°F.
On Monday, in Saint Helena, sunrise will be at 7:23 am and sunset at 6:26 pm (PDT).
In Saint Helena, California, tomorrow, there will be 11h and 3min of daylight.
