Solar Energy & Solar Power Resources

Solar Power in 78521 (Brownsville, TX)

Solar Energy in 78521

Sorry, historical solar radition values for 78521 are currently unavailable, please check back later.

Solar Panels in 78521

Solar panels in 78521 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 78521

The total length of the day in 78521 (Brownsville, TX) today (January 09, 2026) will be 10 hours and 40 minutes. [More]

Solar Energy in 78521 (Brownsville, TX)

Solar Energy Data for 78521

See the chart below to see how different types of solar panel installations compare in 78521.

Historical solar power output data for Brownsville is not currently available.

Solar Energy Analysis for 78521

Sorry, it is not possible to complete our solar energy analysis for 78521 at this time.

Please check back later.

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 78521

Solar Radiation Data in 78521

See the chart below for monthly solar radiation levels in 78521.

Sorry, data is not currently available.

Solar Radiation Analysis for 78521

Sorry, it is not possible to complete our solar radiation analysis for 78521 at this time.

Historical solar radiation data for 78521 is not currently available.

Please check back later.

Solar Power Comparison: 78521 vs. the U.S.

Solar Power Levels in 78521

Sorry, solar radiation data for 78521 is not currently available.

Solar Power: 78521 vs. the U.S.

Below is a month-by-month comparison of how average 78521 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 78521

Sunrise / Sunset in 78521

Sunrise/Sunset for January 09, 2026 ^[2]
- Sunrise: 7:17 am
- Sunset: 5:57 pm
- Length of Day: 10:40

Best Months for Solar in 78521

Monthly data not currently available.

Solar Panel Installs in 78521

We do not have data on solar panel installations in ZIP Code 78521 at the current time.

Solar Power Output in 78521

The Power of Solar in 78521

Monthly AC solar system output averages for 78521. Month-by-month solar power, as ranked by AC output, in 78521. ^[2]

AC output data is not currently available.

Solar Output Analysis for 78521

Sorry, it is not possible to complete our solar radiation analysis for 78521 at this time.

Historical solar radiation data for 78521 is not currently available.

Please check back later.

Weather Forecast for 78521 ^[5]

Fri Jan 9

80°F

Overcast Clouds
Min: 71°F
Max: 83°F

Moderate breeze: 15 mps S
Precip.: n/a
Humidity: 58%
Cloud cover: 99%

Sat Jan 10

61°F

Moderate Rain
Min: 59°F
Max: 73°F

Fresh Breeze: 22 mps N
Precip.: Chance of Rain
Humidity: 34%
Cloud cover: 100%

Sun Jan 11

61°F

Overcast Clouds
Min: 56°F
Max: 61°F

Moderate breeze: 17 mps NNW
Precip.: n/a
Humidity: 39%
Cloud cover: 96%

Mon Jan 12

66°F

Light Rain
Min: 55°F
Max: 67°F

Moderate breeze: 13 mps NNW
Precip.: Chance of Rain
Humidity: 42%
Cloud cover: 96%

Tue Jan 13

67°F

Overcast Clouds
Min: 59°F
Max: 68°F

Light breeze: 7 mps NNW
Precip.: n/a
Humidity: 56%
Cloud cover: 100%

Wed Jan 14

68°F

Overcast Clouds
Min: 61°F
Max: 74°F

Light breeze: 6 mps E
Precip.: n/a
Humidity: 65%
Cloud cover: 100%

More about 78521

About 78521

The ZIP code 78521 is associated with the city of Brownsville in Cameron County in Texas.

78521 Solar Energy & Power

To learn more about solar energy and solar power in 78521, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.