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Solar Power in 78666 (San Marcos, TX)

Solar Energy in 78666

Sorry, historical solar radition values for 78666 are currently unavailable, please check back later.

Solar Panels in 78666

Solar panels in 78666 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 78666

The total length of the day in 78666 (San Marcos, TX) today (June 06, 2026) will be 14 hours and 2 minutes. [More]

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78666 Solar Energy

Solar Energy in 78666 (San Marcos, TX)

Solar Energy Data for 78666

See the chart below to see how different types of solar panel installations compare in 78666.

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


Solar Energy Analysis for 78666

Solar Radiation Data in 78666

Sorry, it is not possible to complete our solar energy analysis for 78666 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 78666

Solar Radiation Data in 78666

See the chart below for monthly solar radiation levels in 78666.

Sorry, data is not currently available.

Solar Radiation Analysis for 78666

Solar Radiation Data in 78666

Sorry, it is not possible to complete our solar radiation analysis for 78666 at this time.

Historical solar radiation data for 78666 is not currently available.

Please check back later.

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Solar Power Comparison: 78666 vs. the U.S.

Solar Power Levels in 78666

Sorry, solar radiation data for 78666 is not currently available.

Solar Power: 78666 vs. the U.S.

Below is a month-by-month comparison of how average 78666 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 78666

Sunrise / Sunset in 78666

  • Sunrise/Sunset for June 06, 2026 [2]
    • Sunrise: 6:29 am
    • Sunset: 8:31 pm
    • Length of Day: 14:2
Solar Energy Statistics for 78666

Best Months for Solar in 78666

Monthly data not currently available.

Solar Panel Installs in 78666

We do not have data on solar panel installations in ZIP Code 78666 at the current time.

Solar Power Output in 78666

The Power of Solar in 78666

Monthly AC solar system output averages for 78666. Month-by-month solar power, as ranked by AC output, in 78666. [2]

AC output data is not currently available.

Solar Output Analysis for 78666

Solar Radiation Data in 78666

Sorry, it is not possible to complete our solar radiation analysis for 78666 at this time.

Historical solar radiation data for 78666 is not currently available.

Please check back later.

Weather Forecast for 78666 [5]

Sat Jun 6
88°F
Moderate Rain
Min: 74°F
Max: 88°F
Moderate breeze: 13 mps SSE
Precip.: Chance of Rain
Humidity: 58%
Cloud cover: 64%
Sun Jun 7
84°F
Light Rain
Min: 73°F
Max: 86°F
Moderate breeze: 16 mps S
Precip.: Chance of Rain
Humidity: 66%
Cloud cover: 100%
Mon Jun 8
90°F
Light Rain
Min: 72°F
Max: 90°F
Fresh Breeze: 18 mps SSE
Precip.: Chance of Rain
Humidity: 46%
Cloud cover: 44%
Tue Jun 9
87°F
Light Rain
Min: 72°F
Max: 87°F
Moderate breeze: 14 mps SSE
Precip.: Chance of Rain
Humidity: 57%
Cloud cover: 73%
Wed Jun 10
90°F
Light Rain
Min: 74°F
Max: 90°F
Moderate breeze: 16 mps S
Precip.: Chance of Rain
Humidity: 49%
Cloud cover: 89%
Thu Jun 11
91°F
Light Rain
Min: 74°F
Max: 95°F
Moderate breeze: 17 mps SSE
Precip.: Chance of Rain
Humidity: 47%
Cloud cover: 84%

More about 78666

About 78666

The ZIP code 78666 is associated with the city of San Marcos in Hays County in Texas.

78666 Solar Power

78666 Solar Energy & Power

To learn more about solar energy and solar power in 78666, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.

Did you know?

Various missions to space by different countries are known to utilize solar energy as a main power source.

Cities in Texas

More ZIP Codes in TX


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References

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