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Solar Power in 40242 (Louisville, KY)

Solar Energy in 40242

The month of August has the highest historical solar radition values in 40242 with an average of 5.92 kWh/m2/day. [More]

Solar Panels in 40242

Solar panels in 40242 that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in 40242

The total length of the day in 40242 (Louisville, KY) today (May 29, 2025) will be 14 hours and 39 minutes. [More]

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40242 Solar Energy

Solar Energy in 40242 (Louisville, KY)

Solar Energy Data for 40242

See the chart below to see how different types of solar panel installations compare in 40242.

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


Solar Energy Analysis for 40242

Solar Radiation Data in 40242

Based on historical 40242 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 40242. [1]

The region associated with 40242 has an average monthly Global Horizontal Irradiance (GHI) of 4.1 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% greater than the average monthly Direct Normal Irradiance (DNI) of 4 kWh/m2/day. [1]

Solar installations in 40242 that are always titled at the latitude of Louisville (Average Tilt at Latitude or ATaL) average 4.68 kWh/m2/day, or about 14% greater than the average monthly GHI of 4.1 kWh/m2/day and approximately 17% greater than the average monthly DNI of 4 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 40242

Solar Radiation Data in 40242

See the chart below for monthly solar radiation levels in 40242.

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

Solar Radiation Analysis for 40242

Solar Radiation Data in 40242

The region associated with 40242 has a average annual solar radiation value of 4.92 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 40242 is August with an average of 5.92 kWh/m2/day, followed by September at 5.84 kWh/m2/day and June at 5.8 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 40242 are December with an average of 3.35 kWh/m2/day, followed by January with an average of 3.52 kWh/m2/day and November at 4.1 kWh/m2/day. [1]

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Solar Power Comparison: 40242 vs. the U.S.

Solar Power Levels in 40242

The average monthly solar radiation level in 40242, of 4.92 kilowatt hours per square meter per day (kWh/m2/day) is approximately 25% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 26% 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: 40242 vs. the U.S.

Below is a month-by-month comparison of how average 40242 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 40242

Sunrise / Sunset in 40242

  • Sunrise/Sunset for May 29, 2025 [2]
    • Sunrise: 6:20 am
    • Sunset: 8:59 pm
    • Length of Day: 14:39
Solar Energy Statistics for 40242

Best Months for Solar in 40242

  • Top Solar Power Months Historically [1]
    • Solar Radiation August (5.92 kWh/m2/day)
    • ATaL: August (5.71 kWh/m2/day)
    • DNI: June (4.96 kWh/m2/day)
    • GHI: June (6.22 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 40242

We do not have data on solar panel installations in ZIP Code 40242 at the current time.

Solar Power Output in 40242

The Power of Solar in 40242

Monthly AC solar system output averages for 40242. Month-by-month solar power, as ranked by AC output, in 40242. [2]

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

Solar Output Analysis for 40242

Solar Radiation Data in 40242

40242 has a average annual solar AC output value of 5548.94 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 40242 is August with an average of 545.94 kWhac, followed by September at 521.43 kWhac and June at 519.86 kWhac. [2]

The three months that historically average the lowest average solar output levels in 40242 are December with an average of 344.85 kWhac, followed by January with an average of 356.2 kWhac and February at 387.35 kWhac. [2]

Weather Forecast for 40242 [5]

Thu May 29
74°F
Overcast Clouds
Min: 58°F
Max: 75°F
Light breeze: 6 mps WNW
Precip.: n/a
Humidity: 57%
Cloud cover: 100%
Fri May 30
58°F
Heavy Intensity Rain
Min: 58°F
Max: 68°F
Moderate breeze: 14 mps N
Precip.: Chance of Rain
Humidity: 97%
Cloud cover: 99%
Sat May 31
67°F
Light Rain
Min: 55°F
Max: 72°F
Moderate breeze: 13 mps NW
Precip.: Chance of Rain
Humidity: 81%
Cloud cover: 54%
Sun Jun 1
71°F
Scattered Clouds
Min: 48°F
Max: 74°F
Light breeze: 5 mps N
Precip.: n/a
Humidity: 38%
Cloud cover: 36%
Mon Jun 2
77°F
Light Rain
Min: 60°F
Max: 79°F
Gentle Breeze: 9 mps WSW
Precip.: Chance of Rain
Humidity: 70%
Cloud cover: 35%
Tue Jun 3
83°F
Light Rain
Min: 64°F
Max: 83°F
Gentle Breeze: 10 mps S
Precip.: Chance of Rain
Humidity: 50%
Cloud cover: 45%

More about 40242

About 40242

The ZIP code 40242 is associated with the city of Louisville in Jefferson County in Kentucky.

40242 Solar Power

40242 Solar Energy & Power

To learn more about solar energy and solar power in 40242, or for more solar-related resources for KY, check out the U.S. Energy Information Administration.

Did you know?

Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.

Cities in Kentucky

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References

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