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Solar Energy in San Francisco, CA

Solar Energy in San Francisco

The month of April has the highest historical solar radition values in San Francisco with an average of 6.62 kWh/m2/day. [More]

Solar Panels in San Francisco

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

Sunrise & Sunset in San Francisco

The total length of the day in San Francisco, CA today (January 23, 2022) will be 10 hours and 4 minutes. [More]

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San Francisco, CA Solar Energy

Solar Power in San Francisco, CA

Solar Energy Data in San Francisco, CA

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

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


Solar Energy Analysis for San Francisco, CA

Solar Radiation Data in San Francisco

Based on historical San Francisco, 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 San Francisco. [1]

San Francisco has an average monthly Global Horizontal Irradiance (GHI) of 4.35 kilowatt hours per square meter per day (kWh/m2/day), which is approximately 7% greater than the average monthly Direct Normal Irradiance (DNI) of 4.05 kWh/m2/day. [1]

Solar installations in San Francisco that are always titled at the latitude of San Francisco (Average Tilt at Latitude or ATaL) average 4.96 kWh/m2/day, or about 14% greater than the average monthly GHI of 4.35 kWh/m2/day and approximately 22% greater than the average monthly DNI of 4.05 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 San Francisco

Solar Radiation Data in San Francisco, CA

See the chart below for monthly solar radiation levels in San Francisco.

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

Solar Radiation Analysis for San Francisco, CA

Solar Radiation Data in San Francisco

San Francisco, CA has a average annual solar radiation value of 5.68 kilowatt hours per square meter per day (kWh/m2/day). [1]

The month with the highest historical solar radition values in San Francisco is April with an average of 6.62 kWh/m2/day, followed by June at 6.56 kWh/m2/day and May at 6.45 kWh/m2/day. [1]

The three months that historically average the lowest average solar radiation levels in San Francisco (California) are December with an average of 3.95 kWh/m2/day, followed by January with an average of 4.5 kWh/m2/day and February at 4.66 kWh/m2/day. [1]

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Solar Power Comparison: San Francisco vs. the U.S.

Solar Power Levels in San Francisco

The average monthly solar radiation level in San Francisco, CA, of 5.68 kilowatt hours per square meter per day (kWh/m2/day) is approximately 52% greater than the average level of 3.73 kWh/m2/day in a city with historically low levels (WA) and is approximately 14% 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: San Francisco vs. the U.S.

Below is a month-by-month comparison of how average San Francisco 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 San Francisco

Sunrise / Sunset in San Francisco

  • Sunrise/Sunset for January 23, 2022 [2]
    • Sunrise: 7:19 am
    • Sunset: 5:23 pm
    • Length of Day: 10:4
Solar Energy Statistics for San Francisco

Best Months for Solar in San Francisco

  • Top Solar Power Months Historically [1]
    • Solar Radiation April (6.62 kWh/m2/day)
    • ATaL: April (6.29 kWh/m2/day)
    • DNI: April (5.77 kWh/m2/day)
    • GHI: June (6.53 kWh/m2/day)

* See glossary & definitions above.

Solar Panel Installs in San Francisco

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

Solar Power Output in San Francisco

The Power of Solar in San Francisco, CA

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

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

Solar Output Analysis for San Francisco, CA

Solar Radiation Data in San Francisco

San Francisco (CA) has a average annual solar AC output value of 6373.33 kilowatt hours (AC). [2]

The month with the highest historical solar power output in San Francisco is May with an average of 614.74 kWhac, followed by April at 614.2 kWhac and July at 596.87 kWhac. [2]

The three months that historically average the lowest average solar output levels in San Francisco (California) are December with an average of 389.27 kWhac, followed by February with an average of 414.27 kWhac and January at 438.88 kWhac. [2]

Cost of Utilities in San Francisco

San Francisco Electricity Costs

Electricity prices (residential) in San Francisco 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: San Francisco

Vote now: Given all of the data and analysis provided for San Francisco, 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

San Francisco 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 San Francisco, CA [5]

Sun Jan 23
56°F
Sky Is Clear
Min: 49°F
Max: 59°F
Light breeze: 6 mps NE
Precip.: n/a
Humidity: 57%
Cloud cover: 0%
Mon Jan 24
56°F
Sky Is Clear
Min: 50°F
Max: 57°F
Light breeze: 6 mps W
Precip.: n/a
Humidity: 59%
Cloud cover: 0%
Tue Jan 25
56°F
Sky Is Clear
Min: 49°F
Max: 58°F
Light breeze: 5 mps WNW
Precip.: n/a
Humidity: 61%
Cloud cover: 0%
Wed Jan 26
57°F
Sky Is Clear
Min: 49°F
Max: 59°F
Light breeze: 7 mps NE
Precip.: n/a
Humidity: 59%
Cloud cover: 0%
Thu Jan 27
58°F
Sky Is Clear
Min: 49°F
Max: 60°F
Light breeze: 7 mps NE
Precip.: n/a
Humidity: 49%
Cloud cover: 0%
Fri Jan 28
57°F
Overcast Clouds
Min: 49°F
Max: 58°F
Light breeze: 7 mps NE
Precip.: n/a
Humidity: 54%
Cloud cover: 100%

More about San Francisco

About San Francisco

The city of San Francisco, CA in San Francisco County has an approximate population of 805,235. [6]

San Francisco Solar Power

San Francisco, CA Solar Energy

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

Did you know?

Various missions to space by different countries are known to utilize solar energy as a main power source.

Other Cities in California

ZIP Codes in CA


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References