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Solar Energy in Walnut Creek, CA

Solar Energy in Walnut Creek

The month of August has the highest historical solar radition values in Walnut Creek with an average of 7.41 kWh/m2/day. [More]

Solar Panels in Walnut Creek

Solar panels in Walnut Creek that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output. [More]

Sunrise & Sunset in Walnut Creek

The total length of the day in Walnut Creek, CA today (January 23, 2022) will be 10 hours and 3 minutes. [More]

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Walnut Creek, CA Solar Energy

Solar Power in Walnut Creek, CA

Solar Energy Data in Walnut Creek, CA

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

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


Solar Energy Analysis for Walnut Creek, CA

Solar Radiation Data in Walnut Creek

Based on historical Walnut Creek, CA data, solar panels that are tilted towards the equator at an angle equal to the latitude will produce the maximum solar energy output in Walnut Creek. [1]

Walnut Creek has an average monthly Global Horizontal Irradiance (GHI) of 5.05 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 10% less than the average monthly Direct Normal Irradiance (DNI) of 5.59 kWh/m2/day. [1]

Solar installations in Walnut Creek that are always titled at the latitude of Walnut Creek (Average Tilt at Latitude or ATaL) average 5.76 kWh/m2/day, or about 14% greater than the average monthly GHI of 5.05 kWh/m2/day and approximately 3% greater than the average monthly DNI of 5.59 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 Walnut Creek

Solar Radiation Data in Walnut Creek, CA

See the chart below for monthly solar radiation levels in Walnut Creek.

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

Solar Radiation Analysis for Walnut Creek, CA

Solar Radiation Data in Walnut Creek

Walnut Creek, CA has a average annual solar radiation value of 5.93 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in Walnut Creek is August with an average of 7.41 kWh/m2/day, followed by July at 7.22 kWh/m2/day and September at 7.19 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in Walnut Creek (California) are January with an average of 3.84 kWh/m2/day, followed by December with an average of 3.96 kWh/m2/day and February at 4.35 kWh/m2/day. [1]

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Solar Power Comparison: Walnut Creek vs. the U.S.

Solar Power Levels in Walnut Creek

The average monthly solar radiation level in Walnut Creek, CA, of 5.93 kilowatt hours per square meter per day (kWh/m2/day) is approximately 59% greater than the average level of 3.73 kWh/m2/day in a city with historically low levels (WA) and is approximately 10% less than the average level of 6.6 kWh/m2/day in a city with historically high levels (NV). [1]


→ Values listed as 0 (zero) are not available (N/A).

Solar Power: Walnut Creek vs. the U.S.

Below is a month-by-month comparison of how average Walnut Creek 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 Walnut Creek

Sunrise / Sunset in Walnut Creek

  • Sunrise/Sunset for January 23, 2022 [2]
    • Sunrise: 7:18 am
    • Sunset: 5:21 pm
    • Length of Day: 10:3
Solar Energy Statistics for Walnut Creek

Best Months for Solar in Walnut Creek

  • Top Solar Power Months Historically [1]
    • Solar Radiation August (7.41 kWh/m2/day)
    • ATaL: July (7.33 kWh/m2/day)
    • DNI: July (8.19 kWh/m2/day)
    • GHI: June (7.95 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in Walnut Creek

We do not currently have data on solar panel installations in the city of Walnut Creek, CA at this current time.

Solar Power Output in Walnut Creek

The Power of Solar in Walnut Creek, CA

Monthly AC solar system output averages for Walnut Creek (ca). Month-by-month solar power, as ranked by AC output, in Walnut Creek. [2]

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

Solar Output Analysis for Walnut Creek, CA

Solar Radiation Data in Walnut Creek

Walnut Creek (CA) has a average annual solar AC output value of 6616.62 kilowatt hours (AC). [2]

The month with the highest historical solar power output in Walnut Creek is August with an average of 682.52 kWhac, followed by July at 673.51 kWhac and May at 639.79 kWhac. [2]

The three months that historically average the lowest average solar output levels in Walnut Creek (California) are January with an average of 378 kWhac, followed by February with an average of 387.47 kWhac and December at 391.99 kWhac. [2]

Cost of Utilities in Walnut Creek

Walnut Creek Electricity Costs

Electricity prices (residential) in Walnut Creek averaged 22.00 cents per kilowatthour (¢/kWh) in October 2021, which was about 56% more than the overall U.S. average residential electricity rate of 14.11¢/kWh in October. [3]

Solar Power Poll: Walnut Creek

Vote now: Given all of the data and analysis provided for Walnut Creek, is solar power a good choice for residents of this city?

Yes, solar power is a great option  
No, solar power isn't a good option

Walnut Creek Natural Gas Costs

Natural gas prices (residential) in California averaged $18.49 per thousand cubic feet (Mcf) in October 2021, which was approximately 6% more than the overall U.S. average residential natural gas rate of $17.48 per Mcf in October. [4]

Weather Forecast for Walnut Creek, CA [5]

Sun Jan 23
59°F
Sky Is Clear
Min: 45°F
Max: 62°F
Light breeze: 4 mps NE
Precip.: n/a
Humidity: 50%
Cloud cover: 0%
Mon Jan 24
60°F
Sky Is Clear
Min: 47°F
Max: 62°F
Light breeze: 3 mps WNW
Precip.: n/a
Humidity: 50%
Cloud cover: 0%
Tue Jan 25
60°F
Sky Is Clear
Min: 46°F
Max: 63°F
Light breeze: 5 mps NE
Precip.: n/a
Humidity: 45%
Cloud cover: 0%
Wed Jan 26
59°F
Sky Is Clear
Min: 45°F
Max: 59°F
Light breeze: 6 mps NE
Precip.: n/a
Humidity: 54%
Cloud cover: 0%
Thu Jan 27
60°F
Sky Is Clear
Min: 45°F
Max: 60°F
Light breeze: 4 mps NE
Precip.: n/a
Humidity: 41%
Cloud cover: 0%
Fri Jan 28
59°F
Overcast Clouds
Min: 45°F
Max: 59°F
Light breeze: 4 mps ENE
Precip.: n/a
Humidity: 48%
Cloud cover: 100%

More about Walnut Creek

About Walnut Creek

The city of Walnut Creek, CA in Contra Costa County has an approximate population of 64,173. [6]

Walnut Creek Solar Power

Walnut Creek, CA Solar Energy

To learn more about solar energy and solar power Walnut Creek, CA, or for more solar-related resources for Walnut Creek, visit the U.S. Energy Information Administration.

Did you know?

Some tax incentives and rebate programs are designed to spur the use of solar energy. These vary by location.

Other Cities in California

ZIP Codes in CA


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References