Based on historical Sammamish, 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 Sammamish.[1]
Sammamish has an average monthly Global Horizontal Irradiance (GHI) of 3.25 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 5% greater than the average monthly Direct Normal Irradiance (DNI) of 3.09 kWh/m2/day. [1]
Solar installations in Sammamish that are always titled at the latitude of Sammamish (Average Tilt at Latitude or ATaL) average 3.7 kWh/m2/day, or about 14% greater than the average monthly GHI of 3.25 kWh/m2/day and approximately 20% greater than the average monthly DNI of 3.09 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 Sammamish
Solar Radiation Data in Sammamish, WA
See the chart below for monthly solar radiation levels in Sammamish.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Sammamish, WA
Sammamish, WA has a average annual solar radiation value of 3.85 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Sammamish is July with an average of 5.77 kWh/m2/day, followed by August at 5.67 kWh/m2/day and June at 5.33 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Sammamish (Washington) are January with an average of 1.82 kWh/m2/day, followed by December with an average of 1.89 kWh/m2/day and November at 2.11 kWh/m2/day. [1]
Solar Power Comparison: Sammamish vs. the U.S.
Solar Power Levels in Sammamish
The average monthly solar radiation level in Sammamish, WA, of 3.85 kilowatt hours per square meter per day (kWh/m2/day) is approximately 2% less than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 42% 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: Sammamish vs. the U.S.
Below is a month-by-month comparison of how average Sammamish 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 Sammamish, WA at this current time.
Solar Power Output in Sammamish
The Power of Solar in Sammamish, WA
Monthly AC solar system output averages for Sammamish (wa). Month-by-month solar power, as ranked by AC output, in Sammamish. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Sammamish, WA
Sammamish (WA) has a average annual solar AC output value of 4295.39 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Sammamish is July with an average of 528.61 kWhac, followed by August at 521.92 kWhac and June at 480.18 kWhac. [2]
The three months that historically average the lowest average solar output levels in Sammamish (Washington) are January with an average of 179.95 kWhac, followed by December with an average of 190.38 kWhac and November at 203.14 kWhac. [2]
Cost of Utilities in Sammamish
Sammamish Electricity Costs
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Solar Power Poll: Sammamish
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Sammamish Natural Gas Costs
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Gentle Breeze: 8 mps SE
Precip.: Chance of Rain
Humidity: 90%
Cloud cover: 100%
Mon Dec 23
51°F
Moderate Rain
Min: 44°F
Max: 51°F
Gentle Breeze: 10 mps S
Precip.: Chance of Rain
Humidity: 75%
Cloud cover: 54%
Tue Dec 24
45°F
Moderate Rain
Min: 41°F
Max: 45°F
Light breeze: 7 mps SE
Precip.: Chance of Rain
Humidity: 95%
Cloud cover: 100%
Wed Dec 25
46°F
Moderate Rain
Min: 41°F
Max: 46°F
Light breeze: 7 mps S
Precip.: Chance of Rain
Humidity: 79%
Cloud cover: 100%
Thu Dec 26
42°F
Moderate Rain
Min: 40°F
Max: 45°F
Light breeze: 6 mps SE
Precip.: Chance of Rain
Humidity: 95%
Cloud cover: 100%
Fri Dec 27
42°F
Moderate Rain
Min: 42°F
Max: 49°F
Gentle Breeze: 10 mps ESE
Precip.: Chance of Rain
Humidity: 93%
Cloud cover: 100%
More about Sammamish
About Sammamish
The city of Sammamish, WA in King County has an approximate population of 45,780. [6]
Sammamish, WA Solar Energy
To learn more about solar energy and solar power Sammamish, WA, or for more solar-related resources for Sammamish, visit 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.