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Solar Power in 61866 (Rantoul, IL)

Solar Energy in 61866

The month of September has the highest historical solar radition values in 61866 with an average of 6.04 kWh/m2/day. [More]

Solar Panels in 61866

Solar panels in 61866 that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in 61866

The total length of the day in 61866 (Rantoul, IL) today (January 21, 2026) will be 9 hours and 51 minutes. [More]

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61866 Solar Energy

Solar Energy in 61866 (Rantoul, IL)

Solar Energy Data for 61866

See the chart below to see how different types of solar panel installations compare in 61866.

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


Solar Energy Analysis for 61866

Solar Radiation Data in 61866

Based on historical 61866 data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in 61866. [1]

The region associated with 61866 has an average monthly Global Horizontal Irradiance (GHI) of 4.02 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% greater than the average monthly Direct Normal Irradiance (DNI) of 3.95 kWh/m2/day. [1]

Solar installations in 61866 that are always titled at the latitude of Rantoul (Average Tilt at Latitude or ATaL) average 4.62 kWh/m2/day, or about 15% greater than the average monthly GHI of 4.02 kWh/m2/day and approximately 17% 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 61866

Solar Radiation Data in 61866

See the chart below for monthly solar radiation levels in 61866.

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

Solar Radiation Analysis for 61866

Solar Radiation Data in 61866

The region associated with 61866 has a average annual solar radiation value of 4.93 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 61866 is September with an average of 6.04 kWh/m2/day, followed by July at 5.99 kWh/m2/day and June at 5.98 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 61866 are December with an average of 3.05 kWh/m2/day, followed by January with an average of 3.48 kWh/m2/day and November at 3.76 kWh/m2/day. [1]

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Solar Power Comparison: 61866 vs. the U.S.

Solar Power Levels in 61866

The average monthly solar radiation level in 61866, of 4.93 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 25% 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: 61866 vs. the U.S.

Below is a month-by-month comparison of how average 61866 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 61866

Sunrise / Sunset in 61866

  • Sunrise/Sunset for January 21, 2026 [2]
    • Sunrise: 7:08 am
    • Sunset: 4:59 pm
    • Length of Day: 9:51
Solar Energy Statistics for 61866

Best Months for Solar in 61866

  • Top Solar Power Months Historically [1]
    • Solar Radiation September (6.04 kWh/m2/day)
    • ATaL: July (5.88 kWh/m2/day)
    • DNI: July (5.27 kWh/m2/day)
    • GHI: July (6.31 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 61866

We do not have data on solar panel installations in ZIP Code 61866 at the current time.

Solar Power Output in 61866

The Power of Solar in 61866

Monthly AC solar system output averages for 61866. Month-by-month solar power, as ranked by AC output, in 61866. [2]

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

Solar Output Analysis for 61866

Solar Radiation Data in 61866

61866 has a average annual solar AC output value of 5653.56 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 61866 is May with an average of 553.24 kWhac, followed by July at 551.87 kWhac and September at 551.63 kWhac. [2]

The three months that historically average the lowest average solar output levels in 61866 are December with an average of 317.09 kWhac, followed by January with an average of 362.47 kWhac and November at 368.85 kWhac. [2]

Weather Forecast for 61866 [5]

Wed Jan 21
35°F
Broken Clouds
Min: 29°F
Max: 38°F
Fresh Breeze: 21 mps W
Precip.: n/a
Humidity: 62%
Cloud cover: 60%
Thu Jan 22
30°F
Broken Clouds
Min: 21°F
Max: 30°F
Moderate breeze: 17 mps WNW
Precip.: n/a
Humidity: 36%
Cloud cover: 72%
Fri Jan 23
1°F
Overcast Clouds
Min: -2°F
Max: 20°F
Fresh Breeze: 20 mps NNW
Precip.: n/a
Humidity: 28%
Cloud cover: 92%
Sat Jan 24
9°F
Overcast Clouds
Min: -2°F
Max: 13°F
Gentle Breeze: 10 mps NNE
Precip.: n/a
Humidity: 47%
Cloud cover: 100%
Sun Jan 25
16°F
Light Snow
Min: 11°F
Max: 19°F
Gentle Breeze: 9 mps ENE
Precip.: Chance of Snow
Humidity: 74%
Cloud cover: 100%
Mon Jan 26
13°F
Overcast Clouds
Min: 7°F
Max: 15°F
Moderate breeze: 17 mps NW
Precip.: n/a
Humidity: 52%
Cloud cover: 87%

More about 61866

About 61866

The ZIP code 61866 is associated with the city of Rantoul in Champaign County in Illinois.

61866 Solar Power

61866 Solar Energy & Power

To learn more about solar energy and solar power in 61866, or for more solar-related resources for IL, check out the U.S. Energy Information Administration.

Did you know?

Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the basis of solar energy in 1839.

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References

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