Weather forecast for tomorrowLake San Marcos, CA
Weather forecast for tomorrow
Monday Oct 19, 2026
- 82°F
- 59°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 9mphSW 233°
- Humidity: 46%
- UV index: 6
- Sunrise: 6:56 am PDT
- Sunset: 6:10 pm PDT
- details ▼
Tomorrow, expect consistent sunshine and open skies.
The temperature is predicted to oscillate between a maximum of a moderately hot 82.4°F and a minimum of a mild 59°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be 82.4°F.
The day's peak of 82.4°F reflects September's seasonal pattern more than October's.
Sunrise will be at 6:56 am and sunset at 6:10 pm; tomorrow's daylight will last for 11h and 14min.
The temperature is predicted to oscillate between a maximum of a moderately hot 82.4°F and a minimum of a mild 59°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be 82.4°F.
The day's peak of 82.4°F reflects September's seasonal pattern more than October's.
Sunrise will be at 6:56 am and sunset at 6:10 pm; tomorrow's daylight will last for 11h and 14min.
Hourly overview
Hourly temperatures
Warmest period: 12 pm - 3 pm 81°C.
Coldest hour: 6 am 61°C.
Coldest hour: 6 am 61°C.
Chance of precipitation
Highest chance: 9 pm 6%.
Hourly weather forecast
- 12 am
- 64°F
- Feels like:64°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphE 100°
- Humidity: 65%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 2 am
- 64°F
- Feels like:64°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphESE 103°
- Humidity: 64%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 4 am
- 63°F
- Feels like:63°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphE 92°
- Humidity: 62%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 61°F
- Feels like:61°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphE 86°
- Humidity: 62%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 6:56 am
- 8 am
- 66°F
- Feels like:66°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphE 97°
- Humidity: 53%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 77°F
- Feels like:77°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphSW 236°
- Humidity: 35%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 12 pm
- 81°F
- Feels like:81°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphWSW 246°
- Humidity: 37%
- Pressure: 29.88"Hg
- Visibility: 9mi
- UV index: 6
- details ▼
- 2 pm
- 81°F
- Feels like:81°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphWSW 250°
- Humidity: 42%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 5
- details ▼
- 4 pm
- 79°F
- Feels like:81°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphWSW 254°
- Humidity: 49%
- Pressure: 29.83"Hg
- Visibility: 9mi
- UV index: 2
- details ▼
- 6 pm
- 73°F
- Feels like:73°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 5mphWSW 249°
- Humidity: 63%
- Pressure: 29.83"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Sunset: 6:10 pm
- 8 pm
- 68°F
- Feels like:68°F
Mostly Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 1mphSW 214°
- Humidity: 77%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 10 pm
- 66°F
- Feels like:66°F
Mostly Clear
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 1mphSSE 160°
- Humidity: 83%
- Pressure: 29.85"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
Tomorrow, mostly cloudless and sunny weather is anticipated.
The temperature will vary between a minimum of 60.8°F and a maximum of 80.6°F. The warmest part of the day will be from 11 am to 2 pm.
The forecasted maximum is more close to September's typical high of 80.8°F than the average for October. The expected low will be close to the average minimum in October, which is 58.8°F.
The temperature will vary between a minimum of 60.8°F and a maximum of 80.6°F. The warmest part of the day will be from 11 am to 2 pm.
The forecasted maximum is more close to September's typical high of 80.8°F than the average for October. The expected low will be close to the average minimum in October, which is 58.8°F.
Updated: Oct 18, 2026 @ 14:50:30 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, bright and sunny weather is expected.
Tomorrow, the highest temperature will be 82.4°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 82.4°F.
The highest temperature will be relatively higher than the average maximum of 75.4°F in October. The lowest temperature will be in line with the average low of 58.8°F.
The highest temperature will be relatively higher than the average maximum of 75.4°F in October. The lowest temperature will be in line with the average low of 58.8°F.
On Monday, in Lake San Marcos, sunrise will be at 6:56 am and sunset at 6:10 pm (PDT).
Tomorrow, the daylight will last for 11h and 14min.
