Solar Energy & Solar Power Resources

Solar Power in 78667 (San Marcos, TX)

Solar Energy in 78667

Sorry, historical solar radition values for 78667 are currently unavailable, please check back later.

Solar Panels in 78667

Solar panels in 78667 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 78667

The total length of the day in 78667 (San Marcos, TX) today (September 13, 2025) will be 12 hours and 26 minutes. [More]

Solar Energy in 78667 (San Marcos, TX)

Solar Energy Data for 78667

See the chart below to see how different types of solar panel installations compare in 78667.

Historical solar power output data for San Marcos is not currently available.

Solar Energy Analysis for 78667

Sorry, it is not possible to complete our solar energy analysis for 78667 at this time.

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Solar Energy Glossary

Global Horizontal Irradiance (GHI)

Global Horizontal Irradiance: The total amount of solar radiation that is received per unit area by a surface that is always positioned in a horizontal manner.

Direct Normal Irradiance (DNI)

Direct Normal Irradiance: The total amount of solar radiation received per unit area by a surface that is always perpendicular to the sun rays that come in a straight line from the direction of the sun at its current position in the sky.

Average Tilt at Latitude (ATaL)

Average Tilt at Latitude: The total amount of solar radiation received per unit area by a surface that is tilted toward the equator at an angle equal to the current latitude. ATaL will often produce the optimum energy output.

Solar Radiation Levels in 78667

Solar Radiation Data in 78667

See the chart below for monthly solar radiation levels in 78667.

Sorry, data is not currently available.

Solar Radiation Analysis for 78667

Sorry, it is not possible to complete our solar radiation analysis for 78667 at this time.

Historical solar radiation data for 78667 is not currently available.

Please check back later.

Solar Power Comparison: 78667 vs. the U.S.

Solar Power Levels in 78667

Sorry, solar radiation data for 78667 is not currently available.

Solar Power: 78667 vs. the U.S.

Below is a month-by-month comparison of how average 78667 solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). ^[1]

Sorry, solar radiation data for Texas is not currently available.

Solar Data & Statistics for 78667

Sunrise / Sunset in 78667

Sunrise/Sunset for September 13, 2025 ^[2]
- Sunrise: 7:14 am
- Sunset: 7:40 pm
- Length of Day: 12:26

Best Months for Solar in 78667

Monthly data not currently available.

Solar Panel Installs in 78667

We do not have data on solar panel installations in ZIP Code 78667 at the current time.

Solar Power Output in 78667

The Power of Solar in 78667

Monthly AC solar system output averages for 78667. Month-by-month solar power, as ranked by AC output, in 78667. ^[2]

AC output data is not currently available.

Solar Output Analysis for 78667

Sorry, it is not possible to complete our solar radiation analysis for 78667 at this time.

Historical solar radiation data for 78667 is not currently available.

Please check back later.

Weather Forecast for 78667 ^[5]

Sat Sep 13

85°F

Few Clouds
Min: 70°F
Max: 94°F

Fresh Breeze: 19 mps SSE
Precip.: n/a
Humidity: 51%
Cloud cover: 13%

Sun Sep 14

91°F

Broken Clouds
Min: 71°F
Max: 95°F

Fresh Breeze: 19 mps SSE
Precip.: n/a
Humidity: 29%
Cloud cover: 72%

Mon Sep 15

91°F

Sky Is Clear
Min: 69°F
Max: 95°F

Fresh Breeze: 19 mps SE
Precip.: n/a
Humidity: 31%
Cloud cover: 1%

Tue Sep 16

90°F

Few Clouds
Min: 69°F
Max: 94°F

Moderate breeze: 16 mps SSE
Precip.: n/a
Humidity: 30%
Cloud cover: 21%

Wed Sep 17

89°F

Overcast Clouds
Min: 70°F
Max: 93°F

Moderate breeze: 17 mps SSE
Precip.: n/a
Humidity: 34%
Cloud cover: 100%

Thu Sep 18

90°F

Sky Is Clear
Min: 69°F
Max: 94°F

Moderate breeze: 14 mps SSE
Precip.: n/a
Humidity: 29%
Cloud cover: 5%

More about 78667

About 78667

The ZIP code 78667 is associated with the city of San Marcos in Hays County in Texas.

78667 Solar Energy & Power

To learn more about solar energy and solar power in 78667, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.