Solar Energy & Solar Power Resources

Solar Power in 99643 (Old Harbor, AK)

Solar Energy in 99643

Sorry, historical solar radition values for 99643 are currently unavailable, please check back later.

Solar Panels in 99643

Solar panels in 99643 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 99643

The total length of the day in 99643 (Old Harbor, AK) today (August 08, 2026) will be 15 hours and 49 minutes. [More]

Solar Energy in 99643 (Old Harbor, AK)

Solar Energy Data for 99643

See the chart below to see how different types of solar panel installations compare in 99643.

Historical solar power output data for Old Harbor is not currently available.

Solar Energy Analysis for 99643

Sorry, it is not possible to complete our solar energy analysis for 99643 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 99643

Solar Radiation Data in 99643

See the chart below for monthly solar radiation levels in 99643.

Sorry, data is not currently available.

Solar Radiation Analysis for 99643

Sorry, it is not possible to complete our solar radiation analysis for 99643 at this time.

Historical solar radiation data for 99643 is not currently available.

Please check back later.

Solar Power Comparison: 99643 vs. the U.S.

Solar Power Levels in 99643

Sorry, solar radiation data for 99643 is not currently available.

Solar Power: 99643 vs. the U.S.

Below is a month-by-month comparison of how average 99643 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 Alaska is not currently available.

Solar Data & Statistics for 99643

Sunrise / Sunset in 99643

Sunrise/Sunset for August 08, 2026 ^[2]
- Sunrise: 6:24 am
- Sunset: 10:13 pm
- Length of Day: 15:49

Best Months for Solar in 99643

Monthly data not currently available.

Solar Panel Installs in 99643

We do not have data on solar panel installations in ZIP Code 99643 at the current time.

Solar Power Output in 99643

The Power of Solar in 99643

Monthly AC solar system output averages for 99643. Month-by-month solar power, as ranked by AC output, in 99643. ^[2]

AC output data is not currently available.

Solar Output Analysis for 99643

Sorry, it is not possible to complete our solar radiation analysis for 99643 at this time.

Historical solar radiation data for 99643 is not currently available.

Please check back later.

Weather Forecast for 99643 ^[5]

Sat Aug 8

67°F

Broken Clouds
Min: 53°F
Max: 67°F

Light breeze: 5 mps SSE
Precip.: n/a
Humidity: 66%
Cloud cover: 51%

Sun Aug 9

66°F

Light Rain
Min: 57°F
Max: 66°F

Light breeze: 5 mps SE
Precip.: Chance of Rain
Humidity: 70%
Cloud cover: 36%

Mon Aug 10

64°F

Overcast Clouds
Min: 55°F
Max: 64°F

Light breeze: 5 mps SSE
Precip.: n/a
Humidity: 76%
Cloud cover: 92%

Tue Aug 11

60°F

Overcast Clouds
Min: 52°F
Max: 62°F

Light breeze: 6 mps SE
Precip.: n/a
Humidity: 80%
Cloud cover: 98%

Wed Aug 12

55°F

Moderate Rain
Min: 50°F
Max: 56°F

Moderate breeze: 14 mps ENE
Precip.: Chance of Rain
Humidity: 95%
Cloud cover: 100%

Thu Aug 13

55°F

Moderate Rain
Min: 54°F
Max: 55°F

Gentle Breeze: 10 mps NE
Precip.: Chance of Rain
Humidity: 96%
Cloud cover: 100%

More about 99643

About 99643

The ZIP code 99643 is associated with the city of Old Harbor in Kodiak Island County in Alaska.

99643 Solar Energy & Power

To learn more about solar energy and solar power in 99643, or for more solar-related resources for AK, check out the U.S. Energy Information Administration.