The month of July has the highest historical solar radition values in Friday Harbor with an average of 6.64 kWh/m2/day. [More]
Solar Panels in Friday Harbor
Solar panels in Friday Harbor that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]
Sunrise & Sunset in Friday Harbor
The total length of the day in Friday Harbor, WA today (April 16, 2025) will be 13 hours and 50 minutes. [More]
Solar Power in Friday Harbor, WA
Solar Energy Data in Friday Harbor, WA
See the chart below to see how different types of solar panel installations compare in Friday Harbor.
Based on historical Friday Harbor, WA data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Friday Harbor.[1]
Friday Harbor has an average monthly Global Horizontal Irradiance (GHI) of 3.55 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 2% less than the average monthly Direct Normal Irradiance (DNI) of 3.61 kWh/m2/day. [1]
Solar installations in Friday Harbor that are always titled at the latitude of Friday Harbor (Average Tilt at Latitude or ATaL) average 4.15 kWh/m2/day, or about 17% greater than the average monthly GHI of 3.55 kWh/m2/day and approximately 15% greater than the average monthly DNI of 3.61 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 Friday Harbor
Solar Radiation Data in Friday Harbor, WA
See the chart below for monthly solar radiation levels in Friday Harbor.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Friday Harbor, WA
Friday Harbor, WA has a average annual solar radiation value of 4.28 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Friday Harbor is July with an average of 6.64 kWh/m2/day, followed by August at 6.34 kWh/m2/day and June at 6.11 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Friday Harbor (Washington) are December with an average of 1.69 kWh/m2/day, followed by January with an average of 1.87 kWh/m2/day and November at 1.93 kWh/m2/day. [1]
Solar Power Comparison: Friday Harbor vs. the U.S.
Solar Power Levels in Friday Harbor
The average monthly solar radiation level in Friday Harbor, WA, of 4.28 kilowatt hours per square meter per day (kWh/m2/day) is approximately 9% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 35% 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: Friday Harbor vs. the U.S.
Below is a month-by-month comparison of how average Friday Harbor 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 town of Friday Harbor, WA at this current time.
Solar Power Output in Friday Harbor
The Power of Solar in Friday Harbor, WA
Monthly AC solar system output averages for Friday Harbor (wa). Month-by-month solar power, as ranked by AC output, in Friday Harbor. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Friday Harbor, WA
Friday Harbor (WA) has a average annual solar AC output value of 4854.78 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Friday Harbor is July with an average of 622.07 kWhac, followed by August at 587.87 kWhac and May at 560.24 kWhac. [2]
The three months that historically average the lowest average solar output levels in Friday Harbor (Washington) are December with an average of 173.37 kWhac, followed by November with an average of 189.14 kWhac and January at 190.06 kWhac. [2]
Cost of Utilities in Friday Harbor
Friday Harbor Electricity Costs
Sorry, Friday Harbor residential electricity prices are currently unavailable.
Please check back later.
Solar Power Poll: Friday Harbor
Vote now: Given all of the data and analysis provided for Friday Harbor, is solar power a good choice for residents of this town?
Friday Harbor Natural Gas Costs
Sorry, Washington residential natural gas prices are currently unavailable.
The town of Friday Harbor, WA in San Juan County has an approximate population of 2,162. [6]
Friday Harbor, WA Solar Energy
To learn more about solar energy and solar power Friday Harbor, WA, or for more solar-related resources for Friday Harbor, visit the U.S. Energy Information Administration.
Did you know?
Solar cells convert sunlight into electricity through a physical process known as the photovoltaic effect.
