Weather forecast for tomorrowSan Marcos, CA
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 84°F
- 61°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphWNW 295°
- Humidity: 33%
- UV index: 6
- Sunrise: 6:55 am PDT
- Sunset: 6:11 pm PDT
- details ▼
On Sunday, in San Marcos, sun-filled conditions are expected to persist.
Rain is not predicted for tomorrow. Temperatures are anticipated to range from a maximum of a warm 84.2°F to a minimum of a breezy 60.8°F.
A forecast high of 84.2°F brings conditions more familiar to September's average than October's.
Sunrise will be at 6:55 am and sunset at 6:11 pm; tomorrow's daylight will last for 11h and 16min.
Rain is not predicted for tomorrow. Temperatures are anticipated to range from a maximum of a warm 84.2°F to a minimum of a breezy 60.8°F.
A forecast high of 84.2°F brings conditions more familiar to September's average than October's.
Sunrise will be at 6:55 am and sunset at 6:11 pm; tomorrow's daylight will last for 11h and 16min.
Hourly overview
Hourly temperatures
Warmest hour: 12 pm 82°C.
Coldest hour: 6 am 63°C.
Coldest hour: 6 am 63°C.
Chance of precipitation
Highest chance: 9 pm 3%.
Hourly weather forecast
- 12 am
- 68°F
- Feels like:68°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphENE 69°
- Humidity: 33%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 66°F
- Feels like:66°F
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphE 87°
- Humidity: 37%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 64°F
- Feels like:64°F
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphENE 76°
- Humidity: 41%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 63°F
- Feels like:63°F
Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphENE 78°
- Humidity: 46%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 6:55 am
- 8 am
- 66°F
- Feels like:66°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphENE 78°
- Humidity: 41%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 77°F
- Feels like:77°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphENE 65°
- Humidity: 26%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 12 pm
- 82°F
- Feels like:82°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphW 273°
- Humidity: 23%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 6
- details ▼
- 2 pm
- 82°F
- Feels like:82°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphW 273°
- Humidity: 29%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 5
- details ▼
- 4 pm
- 81°F
- Feels like:81°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphW 274°
- Humidity: 36%
- Pressure: 29.88"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 6 pm
- 75°F
- Feels like:75°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphWNW 285°
- Humidity: 46%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:11 pm
- 8 pm
- 70°F
- Feels like:70°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphWNW 287°
- Humidity: 63%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 10 pm
- 68°F
- Feels like:68°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 1mphE 79°
- Humidity: 67%
- Pressure: 29.94"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Tomorrow, on Sunday, a combination of cloudy and bright weather is expected.
The temperature will be between a minimum of 62.6°F and a maximum of 82.4°F. The warmest part of the day will be from noon to 2 pm.
The temperature will feel more similar to September's average high than the expected maximum for October. Tomorrow, the temperature will drop to a level in line with October's average minimum of 58.8°F.
The temperature will be between a minimum of 62.6°F and a maximum of 82.4°F. The warmest part of the day will be from noon to 2 pm.
The temperature will feel more similar to September's average high than the expected maximum for October. Tomorrow, the temperature will drop to a level in line with October's average minimum of 58.8°F.
Updated: Oct 17, 2026 @ 15:39:13 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
Tomorrow, in San Marcos, the forecast calls for abundant sunshine.
No, it will not rain tomorrow.
Tomorrow, the maximum temperature will be 84.2°F, while the minimum temperature will be 60.8°F.
The highest temperature tomorrow will be relatively higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
The highest temperature tomorrow will be relatively higher than the average maximum temperature in October. Tomorrow, the lowest temperature will be in line with the average low temperature.
On Sunday, in San Marcos, sunrise will be at 6:55 am and sunset at 6:11 pm (PDT).
In San Marcos, tomorrow, there will be 11h and 16min of daylight.
