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: 47%
- UV index: 6
- Sunrise: 6:56 am PDT
- Sunset: 6:10 pm PDT
- details ▼
On Monday, in Lake San Marcos, conditions remain stable and sunny, with little cloud presence.
The maximum temperature will be a temperate 82.4°F, while the minimum temperature will be a mild 59°F.
The maximum heat index, which adjusts the air temperature based on humidity, is computed to be 82.4°F.
Expect temperatures to match September's average maximum of 80.8°F rather than October's 75.4°F.
Sunrise will be at 6:56 am and sunset at 6:10 pm; tomorrow's daylight will last for 11h and 14min.
The maximum temperature will be a temperate 82.4°F, while the minimum temperature will be a mild 59°F.
The maximum heat index, which adjusts the air temperature based on humidity, is computed to be 82.4°F.
Expect temperatures to match September's average maximum of 80.8°F rather than October's 75.4°F.
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: 3%
- Precipitation: 0"
- Wind: 1mphE 96°
- Humidity: 67%
- 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 104°
- Humidity: 66%
- 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 93°
- Humidity: 63%
- 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: 1mphENE 77°
- Humidity: 62%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 6:56 am
- 8 am
- 66°F
- Feels like:66°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 1mphE 98°
- Humidity: 54%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 77°F
- Feels like:77°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphSW 235°
- Humidity: 38%
- 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: 38%
- 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: 41%
- 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 253°
- Humidity: 47%
- 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 250°
- Humidity: 63%
- Pressure: 29.83"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Sunset: 6:10 pm
- 8 pm
- 68°F
- Feels like:70°F
Mostly Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 1mphSSW 212°
- Humidity: 78%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 10 pm
- 66°F
- Feels like:66°F
Partly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 1mphSE 145°
- Humidity: 84%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Tomorrow, on Monday, primarily sunny and occasionally overcast weather is forecasted.
The temperature will be 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 3 pm.
The highest temperature is more similar to September's average maximum of 80.8°F than October's usual of 75.4°F. The expected low will be alike with the average minimum in October, which is 58.8°F.
The temperature will be 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 3 pm.
The highest temperature is more similar to September's average maximum of 80.8°F than October's usual of 75.4°F. The expected low will be alike with the average minimum in October, which is 58.8°F.
Updated: Oct 18, 2026 @ 18:52:09 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, sunny and dry conditions are anticipated.
Tomorrow, the maximum temperature will be 82.4°F, while the minimum temperature will be 59°F. The maximum heat index, which combines relative humidity and air temperature, is appraised at 82.4°F.
The highest temperature will be moderately 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 moderately 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.
