Weather forecast for tomorrowSan Augustine, CA

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 86°F
  • 59°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 12mphSW 234°
  • Humidity: 46%
  • UV index: 6
  • Sunrise: 7:09 am PDT
  • Sunset: 6:23 pm PDT
  • ▼
Tomorrow, on Sunday, sunshine and minimal clouds are also in the outlook.
A wide temperature range is forecasted, from a high of a blazing 86°F to a low of a refreshing 59°F.
The maximum heat index, which adjusts the air temperature based on humidity, is estimated at a humid 86°F. Take into consideration that the heat index values are calculated for shade and light wind conditions.
Temperatures are higher than average, more in line with September's norm of 77.5°F than with October's 73.6°F.
Sunrise will be at 7:09 am and sunset at 6:23 pm; tomorrow's daylight will last for 11h and 14min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 84°C.
Coldest hour: 6 am 63°C.

Chance of precipitation

Highest chance: 9 pm 5%.

Hourly weather forecast

  • 12 am
  • 66°F
  • Feels like:
    66°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphNE 35°
  • Humidity: 58%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 66°F
  • Feels like:
    66°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNE 46°
  • Humidity: 55%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 64°F
  • Feels like:
    64°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphENE 58°
  • Humidity: 54%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 63°F
  • Feels like:
    63°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphENE 62°
  • Humidity: 58%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:09 am
  • 8 am
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphE 96°
  • Humidity: 59%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 77°F
  • Feels like:
    77°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSE 128°
  • Humidity: 47%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 81°F
  • Feels like:
    81°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSW 213°
  • Humidity: 41%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 82°F
  • Feels like:
    82°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphWSW 259°
  • Humidity: 36%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 4 pm
  • 82°F
  • Feels like:
    82°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphWNW 296°
  • Humidity: 37%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 6 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 11mphNNW 333°
  • Humidity: 55%
  • Pressure: 29.91"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:23 pm
  • 8 pm
  • 66°F
  • Feels like:
    66°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 9mphNNW 344°
  • Humidity: 67%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 63°F
  • Feels like:
    63°F
Mostly Clear
Mostly Clear
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 10mphN 349°
  • Humidity: 77%
  • Pressure: 29.94"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
Tomorrow, primarily dry and sunny and occasionally cloudy weather is expected.
The temperature will vary between the lowest temperature of 60.8°F and the highest temperature of 84.2°F. The hottest part of the day is expected around 3 pm.
Tomorrow, the temperature will be closer to September's norm than to October's average of 73.6°F. The night temperature will be consistent with the standard October low of 57.9°F.
Updated: Oct 17, 2026 @ 23:34:10 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, skies are expected to be clear and full of sunshine.

Tomorrow, the highest temperature will be 86°F, while the lowest temperature will be 59°F. The maximum heat index, which modifies the air temperature to account for humidity, is appraised at 86°F.
Tomorrow, the highest temperature will be significantly higher than the average maximum of 73.6°F in October. The lowest temperature will be in line with the average low of 57.9°F.

On Sunday, in San Augustine, sunrise will be at 7:09 am and sunset at 6:23 pm (PDT).

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