See the chart below to see how different types of solar panel installations compare in Spokane.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day).
* See glossary & definitions below.
Based on historical Spokane, WA data, solar panels that always track the sun throughout the day will produce the maximum solar energy output in Spokane. [1]
Spokane has an average monthly Global Horizontal Irradiance (GHI) of 3.95 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 17% less than the average monthly Direct Normal Irradiance (DNI) of 4.78 kWh/m2/day. [1]
Solar installations in Spokane that are always titled at the latitude of Spokane (Average Tilt at Latitude or ATaL) average 4.72 kWh/m2/day, or about 19% greater than the average monthly GHI of 3.95 kWh/m2/day and approximately 1% less than the average monthly DNI of 4.78 kWh/m2/day. [1]
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: 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: 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.
See the chart below for monthly solar radiation levels in Spokane.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Spokane, WA has a average annual solar radiation value of 4.55 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Spokane is July with an average of 7.12 kWh/m2/day, followed by August at 6.94 kWh/m2/day and September at 5.99 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Spokane (Washington) are December with an average of 1.81 kWh/m2/day, followed by January with an average of 1.93 kWh/m2/day and November at 2.33 kWh/m2/day. [1]
The average monthly solar radiation level in Spokane, WA, of 4.55 kilowatt hours per square meter per day (kWh/m2/day) is approximately 16% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 31% 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).
Below is a month-by-month comparison of how average Spokane 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).
We do not currently have data on solar panel installations in the city of Spokane, WA at this current time.
Monthly AC solar system output averages for Spokane (wa). Month-by-month solar power, as ranked by AC output, in Spokane. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Spokane (WA) has a average annual solar AC output value of 5151.98 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Spokane is July with an average of 655.17 kWhac, followed by August at 632.89 kWhac and May at 573.93 kWhac. [2]
The three months that historically average the lowest average solar output levels in Spokane (Washington) are December with an average of 188.47 kWhac, followed by January with an average of 199.69 kWhac and November at 229.19 kWhac. [2]
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The city of Spokane, WA in Spokane County has an approximate population of 208,916. [6]
To learn more about solar energy and solar power Spokane, WA, or for more solar-related resources for Spokane, visit the U.S. Energy Information Administration.
Solar power is renewable, does not produce any pollutants and is one of the cleanest source of energy.
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