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Solar Power in 40391 (Winchester, KY)

Solar Energy in 40391

The month of September has the highest historical solar radition values in 40391 with an average of 5.83 kWh/m2/day. [More]

Solar Panels in 40391

Solar panels in 40391 that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in 40391

The total length of the day in 40391 (Winchester, KY) today (November 04, 2025) will be 10 hours and 31 minutes. [More]

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40391 Solar Energy

Solar Energy in 40391 (Winchester, KY)

Solar Energy Data for 40391

See the chart below to see how different types of solar panel installations compare in 40391.

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


Solar Energy Analysis for 40391

Solar Radiation Data in 40391

Based on historical 40391 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 40391. [1]

The region associated with 40391 has an average monthly Global Horizontal Irradiance (GHI) of 4.1 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 4% greater than the average monthly Direct Normal Irradiance (DNI) of 3.95 kWh/m2/day. [1]

Solar installations in 40391 that are always titled at the latitude of Winchester (Average Tilt at Latitude or ATaL) average 4.65 kWh/m2/day, or about 13% greater than the average monthly GHI of 4.1 kWh/m2/day and approximately 18% greater than the average monthly DNI of 3.95 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 40391

Solar Radiation Data in 40391

See the chart below for monthly solar radiation levels in 40391.

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

Solar Radiation Analysis for 40391

Solar Radiation Data in 40391

The region associated with 40391 has a average annual solar radiation value of 4.87 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 40391 is September with an average of 5.83 kWh/m2/day, followed by August at 5.73 kWh/m2/day and June at 5.67 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 40391 are December with an average of 3.15 kWh/m2/day, followed by January with an average of 3.58 kWh/m2/day and February at 3.96 kWh/m2/day. [1]

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Solar Power Comparison: 40391 vs. the U.S.

Solar Power Levels in 40391

The average monthly solar radiation level in 40391, of 4.87 kilowatt hours per square meter per day (kWh/m2/day) is approximately 24% 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: 40391 vs. the U.S.

Below is a month-by-month comparison of how average 40391 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 40391

Sunrise / Sunset in 40391

  • Sunrise/Sunset for November 04, 2025 [2]
    • Sunrise: 7:04 am
    • Sunset: 5:35 pm
    • Length of Day: 10:31
Solar Energy Statistics for 40391

Best Months for Solar in 40391

  • Top Solar Power Months Historically [1]
    • Solar Radiation September (5.83 kWh/m2/day)
    • ATaL: August (5.73 kWh/m2/day)
    • DNI: June (4.88 kWh/m2/day)
    • GHI: June (6.21 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 40391

We do not have data on solar panel installations in ZIP Code 40391 at the current time.

Solar Power Output in 40391

The Power of Solar in 40391

Monthly AC solar system output averages for 40391. Month-by-month solar power, as ranked by AC output, in 40391. [2]

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

Solar Output Analysis for 40391

Solar Radiation Data in 40391

40391 has a average annual solar AC output value of 5514.38 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 40391 is August with an average of 529.31 kWhac, followed by May at 527.46 kWhac and September at 522.5 kWhac. [2]

The three months that historically average the lowest average solar output levels in 40391 are December with an average of 322.68 kWhac, followed by February with an average of 361.34 kWhac and January at 366.03 kWhac. [2]

Weather Forecast for 40391 [5]

Tue Nov 4
57°F
Sky Is Clear
Min: 34°F
Max: 60°F
Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 65%
Cloud cover: 0%
Wed Nov 5
64°F
Overcast Clouds
Min: 47°F
Max: 65°F
Fresh Breeze: 20 mps WSW
Precip.: n/a
Humidity: 52%
Cloud cover: 95%
Thu Nov 6
54°F
Sky Is Clear
Min: 36°F
Max: 58°F
Gentle Breeze: 8 mps NNE
Precip.: n/a
Humidity: 36%
Cloud cover: 7%
Fri Nov 7
66°F
Moderate Rain
Min: 44°F
Max: 67°F
Fresh Breeze: 21 mps SW
Precip.: Chance of Rain
Humidity: 59%
Cloud cover: 100%
Sat Nov 8
64°F
Moderate Rain
Min: 51°F
Max: 64°F
Gentle Breeze: 8 mps W
Precip.: Chance of Rain
Humidity: 53%
Cloud cover: 100%
Sun Nov 9
50°F
Light Rain
Min: 36°F
Max: 57°F
Fresh Breeze: 21 mps W
Precip.: Chance of Rain
Humidity: 65%
Cloud cover: 94%

More about 40391

About 40391

The ZIP code 40391 is associated with the city of Winchester in Clark County in Kentucky.

40391 Solar Power

40391 Solar Energy & Power

To learn more about solar energy and solar power in 40391, or for more solar-related resources for KY, check out the U.S. Energy Information Administration.

Did you know?

Various missions to space by different countries are known to utilize solar energy as a main power source.

Cities in Kentucky

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References

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