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Solar Power in 59405 (Great Falls, MT)

Solar Energy in 59405

The month of July has the highest historical solar radition values in 59405 with an average of 7.19 kWh/m2/day. [More]

Solar Panels in 59405

Solar panels in 59405 that always track the sun throughout the day will produce the maximum solar energy output. [More]

Sunrise & Sunset in 59405

The total length of the day in 59405 (Great Falls, MT) today (September 16, 2025) will be 12 hours and 33 minutes. [More]

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59405 Solar Energy

Solar Energy in 59405 (Great Falls, MT)

Solar Energy Data for 59405

See the chart below to see how different types of solar panel installations compare in 59405.

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


Solar Energy Analysis for 59405

Solar Radiation Data in 59405

Based on historical 59405 data, solar panels that always track the sun throughout the day will produce the maximum solar energy output in 59405. [1]

The region associated with 59405 has an average monthly Global Horizontal Irradiance (GHI) of 3.93 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 20% less than the average monthly Direct Normal Irradiance (DNI) of 4.93 kWh/m2/day. [1]

Solar installations in 59405 that are always titled at the latitude of Great Falls (Average Tilt at Latitude or ATaL) average 4.84 kWh/m2/day, or about 23% greater than the average monthly GHI of 3.93 kWh/m2/day and approximately 2% less than the average monthly DNI of 4.93 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 59405

Solar Radiation Data in 59405

See the chart below for monthly solar radiation levels in 59405.

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

Solar Radiation Analysis for 59405

Solar Radiation Data in 59405

The region associated with 59405 has a average annual solar radiation value of 4.89 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in 59405 is July with an average of 7.19 kWh/m2/day, followed by August at 6.64 kWh/m2/day and June at 6.44 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in 59405 are December with an average of 2.69 kWh/m2/day, followed by January with an average of 2.86 kWh/m2/day and November at 3.05 kWh/m2/day. [1]

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Solar Power Comparison: 59405 vs. the U.S.

Solar Power Levels in 59405

The average monthly solar radiation level in 59405, of 4.89 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: 59405 vs. the U.S.

Below is a month-by-month comparison of how average 59405 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 59405

Sunrise / Sunset in 59405

  • Sunrise/Sunset for September 16, 2025 [2]
    • Sunrise: 7:03 am
    • Sunset: 7:36 pm
    • Length of Day: 12:33
Solar Energy Statistics for 59405

Best Months for Solar in 59405

  • Top Solar Power Months Historically [1]
    • Solar Radiation July (7.19 kWh/m2/day)
    • ATaL: July (6.67 kWh/m2/day)
    • DNI: July (7.96 kWh/m2/day)
    • GHI: July (7.13 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in 59405

We do not have data on solar panel installations in ZIP Code 59405 at the current time.

Solar Power Output in 59405

The Power of Solar in 59405

Monthly AC solar system output averages for 59405. Month-by-month solar power, as ranked by AC output, in 59405. [2]

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

Solar Output Analysis for 59405

Solar Radiation Data in 59405

59405 has a average annual solar AC output value of 5587.35 kilowatt hours (AC). [2]

The month with the highest historical solar power output in 59405 is July with an average of 655 kWhac, followed by August at 609.62 kWhac and June at 586.09 kWhac. [2]

The three months that historically average the lowest average solar output levels in 59405 are December with an average of 281.2 kWhac, followed by November with an average of 299.5 kWhac and January at 302.44 kWhac. [2]

Weather Forecast for 59405 [5]

Tue Sep 16
74°F
Light Rain
Min: 54°F
Max: 77°F
Gentle Breeze: 9 mps WSW
Precip.: Chance of Rain
Humidity: 53%
Cloud cover: 44%
Wed Sep 17
75°F
Sky Is Clear
Min: 54°F
Max: 79°F
Gentle Breeze: 8 mps ESE
Precip.: n/a
Humidity: 29%
Cloud cover: 5%
Thu Sep 18
76°F
Sky Is Clear
Min: 56°F
Max: 80°F
Gentle Breeze: 11 mps NE
Precip.: n/a
Humidity: 27%
Cloud cover: 5%
Fri Sep 19
71°F
Overcast Clouds
Min: 56°F
Max: 78°F
Gentle Breeze: 9 mps ENE
Precip.: n/a
Humidity: 33%
Cloud cover: 86%
Sat Sep 20
68°F
Overcast Clouds
Min: 60°F
Max: 74°F
Strong breeze: 25 mps WSW
Precip.: n/a
Humidity: 42%
Cloud cover: 100%
Sun Sep 21
67°F
Light Rain
Min: 56°F
Max: 69°F
High wind, near gale: 31 mps WSW
Precip.: Chance of Rain
Humidity: 29%
Cloud cover: 49%

More about 59405

About 59405

The ZIP code 59405 is associated with the city of Great Falls in Cascade County in Montana.

59405 Solar Power

59405 Solar Energy & Power

To learn more about solar energy and solar power in 59405, or for more solar-related resources for MT, 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.

Cities in Montana

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References

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