Solar Energy & Solar Power Resources

Solar Power in 37921 (Knoxville, TN)

Solar Energy in 37921

Sorry, historical solar radition values for 37921 are currently unavailable, please check back later.

Solar Panels in 37921

Solar panels in 37921 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 37921

The total length of the day in 37921 (Knoxville, TN) today (March 04, 2026) will be 11 hours and 34 minutes. [More]

Solar Energy in 37921 (Knoxville, TN)

Solar Energy Data for 37921

See the chart below to see how different types of solar panel installations compare in 37921.

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

Solar Energy Analysis for 37921

Sorry, it is not possible to complete our solar energy analysis for 37921 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 37921

Solar Radiation Data in 37921

See the chart below for monthly solar radiation levels in 37921.

Sorry, data is not currently available.

Solar Radiation Analysis for 37921

Sorry, it is not possible to complete our solar radiation analysis for 37921 at this time.

Historical solar radiation data for 37921 is not currently available.

Please check back later.

Solar Power Comparison: 37921 vs. the U.S.

Solar Power Levels in 37921

Sorry, solar radiation data for 37921 is not currently available.

Solar Power: 37921 vs. the U.S.

Below is a month-by-month comparison of how average 37921 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 Tennessee is not currently available.

Solar Data & Statistics for 37921

Sunrise / Sunset in 37921

Sunrise/Sunset for March 04, 2026 ^[2]
- Sunrise: 7:00 am
- Sunset: 6:34 pm
- Length of Day: 11:34

Best Months for Solar in 37921

Monthly data not currently available.

Solar Panel Installs in 37921

We do not have data on solar panel installations in ZIP Code 37921 at the current time.

Solar Power Output in 37921

The Power of Solar in 37921

Monthly AC solar system output averages for 37921. Month-by-month solar power, as ranked by AC output, in 37921. ^[2]

AC output data is not currently available.

Solar Output Analysis for 37921

Sorry, it is not possible to complete our solar radiation analysis for 37921 at this time.

Historical solar radiation data for 37921 is not currently available.

Please check back later.

Weather Forecast for 37921 ^[5]

Wed Mar 4

62°F

Overcast Clouds
Min: 54°F
Max: 75°F

Gentle Breeze: 9 mps SW
Precip.: n/a
Humidity: 72%
Cloud cover: 85%

Thu Mar 5

73°F

Overcast Clouds
Min: 53°F
Max: 76°F

Moderate breeze: 13 mps SW
Precip.: n/a
Humidity: 52%
Cloud cover: 100%

Fri Mar 6

74°F

Moderate Rain
Min: 57°F
Max: 81°F

Gentle Breeze: 10 mps SSW
Precip.: Chance of Rain
Humidity: 56%
Cloud cover: 61%

Sat Mar 7

78°F

Moderate Rain
Min: 60°F
Max: 78°F

Moderate breeze: 15 mps SW
Precip.: Chance of Rain
Humidity: 49%
Cloud cover: 21%

Sun Mar 8

68°F

Light Rain
Min: 60°F
Max: 69°F

Light breeze: 6 mps WSW
Precip.: Chance of Rain
Humidity: 75%
Cloud cover: 100%

Mon Mar 9

72°F

Light Rain
Min: 59°F
Max: 73°F

Gentle Breeze: 10 mps WSW
Precip.: Chance of Rain
Humidity: 66%
Cloud cover: 100%

More about 37921

About 37921

The ZIP code 37921 is associated with the city of Knoxville in Knox County in Tennessee.

37921 Solar Energy & Power

To learn more about solar energy and solar power in 37921, or for more solar-related resources for TN, check out the U.S. Energy Information Administration.