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Solar Power in 50138 (Knoxville, IA)

Solar Energy in 50138

The month of July has the highest historical solar radition values in 50138 with an average of 6.24 kWh/m2/day. [More]

Solar Panels in 50138

Solar panels in 50138 that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in 50138

The total length of the day in 50138 (Knoxville, IA) today (July 17, 2025) will be 14 hours and 52 minutes. [More]

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50138 Solar Energy

Solar Energy in 50138 (Knoxville, IA)

Solar Energy Data for 50138

See the chart below to see how different types of solar panel installations compare in 50138.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.


Solar Energy Analysis for 50138

Solar Radiation Data in 50138

Based on historical 50138 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 50138. [1]

The region associated with 50138 has an average monthly Global Horizontal Irradiance (GHI) of 4.03 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 5% less than the average monthly Direct Normal Irradiance (DNI) of 4.25 kWh/m2/day. [1]

Solar installations in 50138 that are always titled at the latitude of Knoxville (Average Tilt at Latitude or ATaL) average 4.7 kWh/m2/day, or about 17% greater than the average monthly GHI of 4.03 kWh/m2/day and approximately 11% greater than the average monthly DNI of 4.25 kWh/m2/day. [1]

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 50138

Solar Radiation Data in 50138

See the chart below for monthly solar radiation levels in 50138.

* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)

Solar Radiation Analysis for 50138

Solar Radiation Data in 50138

The region associated with 50138 has a average annual solar radiation value of 5 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 50138 is July with an average of 6.24 kWh/m2/day, followed by September at 5.96 kWh/m2/day and August at 5.87 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 50138 are December with an average of 3.3 kWh/m2/day, followed by January with an average of 3.66 kWh/m2/day and November at 3.98 kWh/m2/day. [1]

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Solar Power Comparison: 50138 vs. the U.S.

Solar Power Levels in 50138

The average monthly solar radiation level in 50138, of 5 kilowatt hours per square meter per day (kWh/m2/day) is approximately 27% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 24% less than the average level of 6.61 kWh/m2/day in a city with historically high levels (NV). [1]


→ Values listed as 0 (zero) are not available (N/A).

Solar Power: 50138 vs. the U.S.

Below is a month-by-month comparison of how average 50138 solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). [1]

→ k/m/d = kWh/m2/day = kilowatt hours per square meter per day.
→ Values listed as 0 (zero) are not available (N/A).

Solar Data & Statistics for 50138

Sunrise / Sunset in 50138

  • Sunrise/Sunset for July 17, 2025 [2]
    • Sunrise: 5:52 am
    • Sunset: 8:44 pm
    • Length of Day: 14:52
Solar Energy Statistics for 50138

Best Months for Solar in 50138

  • Top Solar Power Months Historically [1]
    • Solar Radiation July (6.24 kWh/m2/day)
    • ATaL: July (5.93 kWh/m2/day)
    • DNI: July (5.85 kWh/m2/day)
    • GHI: July (6.4 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 50138

We do not have data on solar panel installations in ZIP Code 50138 at the current time.

Solar Power Output in 50138

The Power of Solar in 50138

Monthly AC solar system output averages for 50138. Month-by-month solar power, as ranked by AC output, in 50138. [2]

* Amounts listed in kWhac (kilowatt hours (AC))

Solar Output Analysis for 50138

Solar Radiation Data in 50138

50138 has a average annual solar AC output value of 5736.3 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 50138 is July with an average of 571.26 kWhac, followed by September at 544.39 kWhac and August at 541.77 kWhac. [2]

The three months that historically average the lowest average solar output levels in 50138 are December with an average of 347.47 kWhac, followed by January with an average of 386.45 kWhac and November at 389.79 kWhac. [2]

Weather Forecast for 50138 [5]

Thu Jul 17
71°F
Broken Clouds
Min: 62°F
Max: 72°F
Gentle Breeze: 11 mps N
Precip.: n/a
Humidity: 69%
Cloud cover: 56%
Fri Jul 18
80°F
Light Rain
Min: 64°F
Max: 80°F
Gentle Breeze: 11 mps SE
Precip.: Chance of Rain
Humidity: 71%
Cloud cover: 96%
Sat Jul 19
87°F
Light Rain
Min: 69°F
Max: 91°F
Gentle Breeze: 10 mps SSW
Precip.: Chance of Rain
Humidity: 66%
Cloud cover: 64%
Sun Jul 20
77°F
Moderate Rain
Min: 71°F
Max: 81°F
Moderate breeze: 14 mps ESE
Precip.: Chance of Rain
Humidity: 91%
Cloud cover: 100%
Mon Jul 21
75°F
Moderate Rain
Min: 69°F
Max: 81°F
Moderate breeze: 14 mps E
Precip.: Chance of Rain
Humidity: 91%
Cloud cover: 100%
Tue Jul 22
87°F
Light Rain
Min: 74°F
Max: 90°F
Moderate breeze: 14 mps S
Precip.: Chance of Rain
Humidity: 67%
Cloud cover: 95%

More about 50138

About 50138

The ZIP code 50138 is associated with the city of Knoxville in Marion County in Iowa.

50138 Solar Power

50138 Solar Energy & Power

To learn more about solar energy and solar power in 50138, or for more solar-related resources for IA, check out the U.S. Energy Information Administration.

Did you know?

The solar energy that strikes the Earth in one hour could provide all of the Earth's energy needs for a complete year.

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References

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