Solar Energy & Solar Power Resources

Solar Power in 78551 (Harlingen, TX)

Solar Energy in 78551

Sorry, historical solar radition values for 78551 are currently unavailable, please check back later.

Solar Panels in 78551

Solar panels in 78551 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 78551

The total length of the day in 78551 (Harlingen, TX) today (July 04, 2026) will be 13 hours and 46 minutes. [More]

Solar Energy in 78551 (Harlingen, TX)

Solar Energy Data for 78551

See the chart below to see how different types of solar panel installations compare in 78551.

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

Solar Energy Analysis for 78551

Sorry, it is not possible to complete our solar energy analysis for 78551 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 78551

Solar Radiation Data in 78551

See the chart below for monthly solar radiation levels in 78551.

Sorry, data is not currently available.

Solar Radiation Analysis for 78551

Sorry, it is not possible to complete our solar radiation analysis for 78551 at this time.

Historical solar radiation data for 78551 is not currently available.

Please check back later.

Solar Power Comparison: 78551 vs. the U.S.

Solar Power Levels in 78551

Sorry, solar radiation data for 78551 is not currently available.

Solar Power: 78551 vs. the U.S.

Below is a month-by-month comparison of how average 78551 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 78551

Sunrise / Sunset in 78551

Sunrise/Sunset for July 04, 2026 ^[2]
- Sunrise: 6:42 am
- Sunset: 8:28 pm
- Length of Day: 13:46

Best Months for Solar in 78551

Monthly data not currently available.

Solar Panel Installs in 78551

We do not have data on solar panel installations in ZIP Code 78551 at the current time.

Solar Power Output in 78551

The Power of Solar in 78551

Monthly AC solar system output averages for 78551. Month-by-month solar power, as ranked by AC output, in 78551. ^[2]

AC output data is not currently available.

Solar Output Analysis for 78551

Sorry, it is not possible to complete our solar radiation analysis for 78551 at this time.

Historical solar radiation data for 78551 is not currently available.

Please check back later.

Weather Forecast for 78551 ^[5]

Sat Jul 4

94°F

Sky Is Clear
Min: 78°F
Max: 94°F

Fresh Breeze: 20 mps SE
Precip.: n/a
Humidity: 37%
Cloud cover: 6%

Sun Jul 5

96°F

Scattered Clouds
Min: 80°F
Max: 96°F

Moderate breeze: 18 mps SE
Precip.: n/a
Humidity: 37%
Cloud cover: 48%

Mon Jul 6

99°F

Few Clouds
Min: 77°F
Max: 101°F

Fresh Breeze: 20 mps SE
Precip.: n/a
Humidity: 36%
Cloud cover: 12%

Tue Jul 7

99°F

Few Clouds
Min: 78°F
Max: 101°F

Fresh Breeze: 19 mps SE
Precip.: n/a
Humidity: 35%
Cloud cover: 13%

Wed Jul 8

99°F

Few Clouds
Min: 78°F
Max: 99°F

Fresh Breeze: 20 mps SSE
Precip.: n/a
Humidity: 33%
Cloud cover: 15%

Thu Jul 9

97°F

Scattered Clouds
Min: 78°F
Max: 97°F

Fresh Breeze: 22 mps SSE
Precip.: n/a
Humidity: 35%
Cloud cover: 43%

More about 78551

About 78551

The ZIP code 78551 is associated with the city of Harlingen in Cameron County in Texas.

78551 Solar Energy & Power

To learn more about solar energy and solar power in 78551, or for more solar-related resources for TX, check out the U.S. Energy Information Administration.