Based on historical Yelm, 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 Yelm.[1]
Yelm has an average monthly Global Horizontal Irradiance (GHI) of 3.34 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 8% greater than the average monthly Direct Normal Irradiance (DNI) of 3.08 kWh/m2/day. [1]
Solar installations in Yelm that are always titled at the latitude of Yelm (Average Tilt at Latitude or ATaL) average 3.82 kWh/m2/day, or about 14% greater than the average monthly GHI of 3.34 kWh/m2/day and approximately 24% greater than the average monthly DNI of 3.08 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 Yelm
Solar Radiation Data in Yelm, WA
See the chart below for monthly solar radiation levels in Yelm.
* Amounts listed in kWh/m2/day (kilowatt hours per square meter per day)
Solar Radiation Analysis for Yelm, WA
Yelm, WA has a average annual solar radiation value of 4.01 kilowatt hours per square meter per day (kWh/m2/day). [1]
The month with the highest historical solar radition values in Yelm is July with an average of 6.12 kWh/m2/day, followed by August at 5.92 kWh/m2/day and September at 5.49 kWh/m2/day. [1]
The three months that historically average the lowest average solar radiation levels in Yelm (Washington) are January with an average of 1.79 kWh/m2/day, followed by December with an average of 1.94 kWh/m2/day and November at 2.06 kWh/m2/day. [1]
Solar Power Comparison: Yelm vs. the U.S.
Solar Power Levels in Yelm
The average monthly solar radiation level in Yelm, WA, of 4.01 kilowatt hours per square meter per day (kWh/m2/day) is approximately 2% greater than the average level of 3.93 kWh/m2/day in a city with historically low levels (WA) and is approximately 39% 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: Yelm vs. the U.S.
Below is a month-by-month comparison of how average Yelm 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 Yelm, WA at this current time.
Solar Power Output in Yelm
The Power of Solar in Yelm, WA
Monthly AC solar system output averages for Yelm (wa). Month-by-month solar power, as ranked by AC output, in Yelm. [2]
* Amounts listed in kWhac (kilowatt hours (AC))
Solar Output Analysis for Yelm, WA
Yelm (WA) has a average annual solar AC output value of 4475.45 kilowatt hours (AC). [2]
The month with the highest historical solar power output in Yelm is July with an average of 557.64 kWhac, followed by August at 540.7 kWhac and September at 491.05 kWhac. [2]
The three months that historically average the lowest average solar output levels in Yelm (Washington) are January with an average of 178.13 kWhac, followed by December with an average of 194.95 kWhac and November at 198.45 kWhac. [2]
Cost of Utilities in Yelm
Yelm Electricity Costs
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Solar Power Poll: Yelm
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Yelm Natural Gas Costs
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Gentle Breeze: 12 mps S
Precip.: Chance of Rain
Humidity: 90%
Cloud cover: 100%
Fri Dec 27
47°F
Light Rain
Min: 43°F
Max: 47°F
Gentle Breeze: 10 mps S
Precip.: Chance of Rain
Humidity: 88%
Cloud cover: 97%
More about Yelm
About Yelm
The city of Yelm, WA in Thurston County has an approximate population of 6,848. [6]
Yelm, WA Solar Energy
To learn more about solar energy and solar power Yelm, WA, or for more solar-related resources for Yelm, visit 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.