Weather forecast for tomorrow
San Marcos, TX

Weather forecast for tomorrow

Saturday, May 17.

AM Clouds / PM Sun
6:35 am

8:20 pm
CDT
AM Clouds / PM Sun
97°F / 73°F
  • Wind: 12mph S
  • Humidity: 66%
  • Precip. probability: 15%
  • Precipitation: 0"
  • UV index: 8
Tomorrow, in San Marcos, cloudy conditions in the morning will give way to a clearer and sunnier afternoon.
Rainfall is not predicted. The expected temperature range extends from a high of a fiery hot 96.8°F to a low of a warm 73.4°F.
The maximum heat index, which combines relative humidity and air temperature, is computed to be a blazing hot 125.6°F. Note that heat index values are valued for light wind and location in the shade. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
Tomorrow, the forecast high deviates from May's norm and tracks June's average temperature of 90.7°F.
Sunrise will be at 6:35 am and sunset at 8:20 pm; tomorrow's daylight will last for 13h and 45min.

Frequently asked questions

What is the weather forecast for San Marcos for tomorrow?
On Saturday, low clouds in the morning are expected to clear, bringing a bright afternoon.
Will it rain tomorrow?
No, it will not rain tomorrow.
What will be the highest temperature tomorrow?
Tomorrow, the maximum temperature will be 96.8°F, while the minimum temperature will be 73.4°F. The maximum heat index, which combines relative humidity and air temperature, is computed to be 125.6°F.
Tomorrow, the highest temperature will be significantly higher than the average maximum of 83.8°F in May. Tomorrow, the lowest temperature will be moderately higher than the average low temperature.
What time are sunrise and sunset tomorrow?
On Saturday, in San Marcos, sunrise will be at 6:35 am and sunset at 8:20 pm (CDT).
How long will the day be tomorrow?
In San Marcos, Texas, tomorrow, there will be 13h and 45min of daylight.

Hourly weather forecast

12 am
  • 81°F
  • Feels like:
    86°F
Heavy Thunderstorms
Heavy Thunderstorms
  • Wind: 9mph SSE
  • Pressure: 29.8"Hg
  • Humidity: 82%
  • Precip. probability: 99%
  • Precipitation: 1.06"
  • Visibility: 2mi
2 am
  • 77°F
  • Feels like:
    77°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 8mph S
  • Pressure: 29.8"Hg
  • Humidity: 89%
  • Precip. probability: 5%
  • Precipitation: 0"
  • Visibility: 10mi
4 am
  • 77°F
  • Feels like:
    82°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph S
  • Pressure: 29.8"Hg
  • Humidity: 95%
  • Precip. probability: 16%
  • Precipitation: 0"
  • Visibility: 9mi
6 am
  • 77°F
  • Feels like:
    82°F
Cloudy
Cloudy
  • Wind: 6mph S
  • Pressure: 29.83"Hg
  • Humidity: 96%
  • Precip. probability: 16%
  • Precipitation: 0"
  • Visibility: 7mi
Sunrise: 6:35 am
8 am
  • 77°F
  • Feels like:
    84°F
Cloudy
Cloudy
  • Wind: 7mph SSE
  • Pressure: 29.85"Hg
  • Humidity: 93%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 8mi
10 am
  • 82°F
  • Feels like:
    90°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 11mph S
  • Pressure: 29.85"Hg
  • Humidity: 80%
  • Precip. probability: 5%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 88°F
  • Feels like:
    97°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 12mph S
  • Pressure: 29.85"Hg
  • Humidity: 64%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 93°F
  • Feels like:
    102°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 12mph S
  • Pressure: 29.8"Hg
  • Humidity: 53%
  • Precip. probability: 15%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 95°F
  • Feels like:
    104°F
Partly Cloudy
Partly Cloudy
  • Wind: 12mph S
  • Pressure: 29.71"Hg
  • Humidity: 47%
  • Precip. probability: 15%
  • Precipitation: 0"
  • Visibility: 10mi
6 pm
  • 93°F
  • Feels like:
    102°F
Partly Cloudy
Partly Cloudy
  • Wind: 12mph SSE
  • Pressure: 29.71"Hg
  • Humidity: 47%
  • Precip. probability: 1%
  • Precipitation: 0"
  • Visibility: 10mi
8 pm
  • 88°F
  • Feels like:
    95°F
Cloudy
Cloudy
  • Wind: 12mph SSE
  • Pressure: 29.74"Hg
  • Humidity: 60%
  • Precip. probability: 15%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 8:20 pm
10 pm
  • 82°F
  • Feels like:
    88°F
Cloudy
Cloudy
  • Wind: 12mph SSE
  • Pressure: 29.8"Hg
  • Humidity: 75%
  • Precip. probability: 18%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, a combination of primarily gloomy and occasionally stormy and bright weather is forecasted.
With a 99% probability, severe rainfall is expected around 12 am.
The temperature will vary between the lowest temperature of 77°F and the highest temperature of 95°F. The feels-like temperature will vary between a minimum of 77°F and a maximum of 104°F. The hottest part of the day will be at 4 pm and 5 pm.
Tomorrow, the high will reflect a pattern closer to June's 90.7°F than May's. The expected low will be also more alike with what’s common in June than the current May average of 65.8°F.
Updated: May 17, 2025 @ 00:55:37 UTC
Published by: Weather Atlas | About Us
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