Solar Energy & Solar Power Resources

Solar Power in 18109 (Allentown, PA)

Solar Energy in 18109

Sorry, historical solar radition values for 18109 are currently unavailable, please check back later.

Solar Panels in 18109

Solar panels in 18109 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 18109

The total length of the day in 18109 (Allentown, PA) today (October 05, 2026) will be 11 hours and 37 minutes. [More]

Solar Energy in 18109 (Allentown, PA)

Solar Energy Data for 18109

See the chart below to see how different types of solar panel installations compare in 18109.

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

Solar Energy Analysis for 18109

Sorry, it is not possible to complete our solar energy analysis for 18109 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 18109

Solar Radiation Data in 18109

See the chart below for monthly solar radiation levels in 18109.

Sorry, data is not currently available.

Solar Radiation Analysis for 18109

Sorry, it is not possible to complete our solar radiation analysis for 18109 at this time.

Historical solar radiation data for 18109 is not currently available.

Please check back later.

Solar Power Comparison: 18109 vs. the U.S.

Solar Power Levels in 18109

Sorry, solar radiation data for 18109 is not currently available.

Solar Power: 18109 vs. the U.S.

Below is a month-by-month comparison of how average 18109 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 Pennsylvania is not currently available.

Solar Data & Statistics for 18109

Sunrise / Sunset in 18109

Sunrise/Sunset for October 05, 2026 ^[2]
- Sunrise: 7:01 am
- Sunset: 6:38 pm
- Length of Day: 11:37

Best Months for Solar in 18109

Monthly data not currently available.

Solar Panel Installs in 18109

We do not have data on solar panel installations in ZIP Code 18109 at the current time.

Solar Power Output in 18109

The Power of Solar in 18109

Monthly AC solar system output averages for 18109. Month-by-month solar power, as ranked by AC output, in 18109. ^[2]

AC output data is not currently available.

Solar Output Analysis for 18109

Sorry, it is not possible to complete our solar radiation analysis for 18109 at this time.

Historical solar radiation data for 18109 is not currently available.

Please check back later.

Weather Forecast for 18109 ^[5]

Mon Oct 5

63°F

Sky Is Clear
Min: 49°F
Max: 65°F

Moderate breeze: 14 mps NW
Precip.: n/a
Humidity: 62%
Cloud cover: 7%

Tue Oct 6

55°F

Sky Is Clear
Min: 42°F
Max: 58°F

Light breeze: 7 mps NW
Precip.: n/a
Humidity: 49%
Cloud cover: 1%

Wed Oct 7

63°F

Sky Is Clear
Min: 43°F
Max: 67°F

Gentle Breeze: 10 mps SSW
Precip.: n/a
Humidity: 52%
Cloud cover: 0%

Thu Oct 8

66°F

Few Clouds
Min: 50°F
Max: 73°F

Gentle Breeze: 11 mps W
Precip.: n/a
Humidity: 63%
Cloud cover: 13%

Fri Oct 9

62°F

Sky Is Clear
Min: 48°F
Max: 66°F

Gentle Breeze: 8 mps W
Precip.: n/a
Humidity: 55%
Cloud cover: 0%

Sat Oct 10

63°F

Sky Is Clear
Min: 47°F
Max: 68°F

Light breeze: 6 mps NW
Precip.: n/a
Humidity: 50%
Cloud cover: 0%

More about 18109

About 18109

The ZIP code 18109 is associated with the city of Allentown in Lehigh County in Pennsylvania.

18109 Solar Energy & Power

To learn more about solar energy and solar power in 18109, or for more solar-related resources for PA, check out the U.S. Energy Information Administration.