Solar Energy & Solar Power Resources

Solar Energy in Napa, CA

Solar Energy in Napa

Sorry, historical solar radition values for Napa are currently unavailable, please check back later.

Solar Panels in Napa

Solar panels in Napa that will produce the maximum solar energy output. [More]

Sunrise & Sunset in Napa

The total length of the day in Napa, CA today (June 12, 2026) will be 14 hours and 51 minutes. [More]

Solar Power in Napa, CA

Solar Energy Data in Napa, CA

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

Historical solar power output data for Napa is not currently available.

Solar Energy Analysis for Napa, CA

Sorry, it is not possible to complete our solar energy analysis for Napa at this time.

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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 Napa

Solar Radiation Data in Napa, CA

See the chart below for monthly solar radiation levels in Napa.

Sorry, data is not currently available.

Solar Radiation Analysis for Napa, CA

Sorry, it is not possible to complete our solar radiation analysis for Napa at this time.

Historical solar radiation data for Napa is not currently available.

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Solar Power Comparison: Napa vs. the U.S.

Solar Power Levels in Napa

Sorry, solar radiation data for California is not currently available.

Solar Power: Napa vs. the U.S.

Below is a month-by-month comparison of how average Napa solar radiation levels compare to average levels in a city with historcially high levels (NV) and a city with historically low levels (WA). ^[1]

Sorry, solar radiation data for California is not currently available.

Solar Data & Statistics for Napa

Sunrise / Sunset in Napa

Sunrise/Sunset for June 12, 2026 ^[2]
- Sunrise: 5:43 am
- Sunset: 8:34 pm
- Length of Day: 14:51

Best Months for Solar in Napa

Monthly data not currently available.

Solar Panel Installs in Napa

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

Solar Power Output in Napa

The Power of Solar in Napa, CA

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

AC output data is not currently available.

Solar Output Analysis for Napa, CA

Sorry, it is not possible to complete our solar radiation analysis for Napa at this time.

Historical solar radiation data for Napa is not currently available.

Please check back later.

Cost of Utilities in Napa

Napa Electricity Costs

Sorry, Napa residential electricity prices are currently unavailable.

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Solar Power Poll: Napa

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

Napa Natural Gas Costs

Sorry, California residential natural gas prices are currently unavailable.

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Weather Forecast for Napa, CA ^[5]

Fri Jun 12

95°F

Sky Is Clear
Min: 58°F
Max: 95°F

Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 19%
Cloud cover: 0%

Sat Jun 13

91°F

Sky Is Clear
Min: 50°F
Max: 91°F

Gentle Breeze: 8 mps W
Precip.: n/a
Humidity: 23%
Cloud cover: 0%

Sun Jun 14

91°F

Sky Is Clear
Min: 57°F
Max: 92°F

Gentle Breeze: 8 mps WSW
Precip.: n/a
Humidity: 26%
Cloud cover: 0%

Mon Jun 15

92°F

Sky Is Clear
Min: 58°F
Max: 93°F

Gentle Breeze: 8 mps SW
Precip.: n/a
Humidity: 26%
Cloud cover: 0%

Tue Jun 16

92°F

Sky Is Clear
Min: 56°F
Max: 92°F

Gentle Breeze: 8 mps WSW
Precip.: n/a
Humidity: 25%
Cloud cover: 0%

Wed Jun 17

84°F

Sky Is Clear
Min: 54°F
Max: 84°F

Light breeze: 6 mps SSW
Precip.: n/a
Humidity: 32%
Cloud cover: 0%

More about Napa

About Napa

The city of Napa, CA in Napa County has an approximate population of 76,915. ^[6]

Napa, CA Solar Energy

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