Solar Energy & Solar Power Resources

Solar Power in 94574 (Saint Helena, CA)

Solar Energy in 94574

Sorry, historical solar radition values for 94574 are currently unavailable, please check back later.

Solar Panels in 94574

Solar panels in 94574 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 94574

The total length of the day in 94574 (Saint Helena, CA) today (December 04, 2025) will be 9 hours and 40 minutes. [More]

Solar Energy in 94574 (Saint Helena, CA)

Solar Energy Data for 94574

See the chart below to see how different types of solar panel installations compare in 94574.

Historical solar power output data for Saint Helena is not currently available.

Solar Energy Analysis for 94574

Sorry, it is not possible to complete our solar energy analysis for 94574 at this time.

Please check back later.

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 94574

Solar Radiation Data in 94574

See the chart below for monthly solar radiation levels in 94574.

Sorry, data is not currently available.

Solar Radiation Analysis for 94574

Sorry, it is not possible to complete our solar radiation analysis for 94574 at this time.

Historical solar radiation data for 94574 is not currently available.

Please check back later.

Solar Power Comparison: 94574 vs. the U.S.

Solar Power Levels in 94574

Sorry, solar radiation data for 94574 is not currently available.

Solar Power: 94574 vs. the U.S.

Below is a month-by-month comparison of how average 94574 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 94574

Sunrise / Sunset in 94574

Sunrise/Sunset for December 04, 2025 ^[2]
- Sunrise: 7:10 am
- Sunset: 4:50 pm
- Length of Day: 9:40

Best Months for Solar in 94574

Monthly data not currently available.

Solar Panel Installs in 94574

We do not have data on solar panel installations in ZIP Code 94574 at the current time.

Solar Power Output in 94574

The Power of Solar in 94574

Monthly AC solar system output averages for 94574. Month-by-month solar power, as ranked by AC output, in 94574. ^[2]

AC output data is not currently available.

Solar Output Analysis for 94574

Sorry, it is not possible to complete our solar radiation analysis for 94574 at this time.

Historical solar radiation data for 94574 is not currently available.

Please check back later.

Weather Forecast for 94574 ^[5]

Thu Dec 4

61°F

Broken Clouds
Min: 47°F
Max: 63°F

Light breeze: 4 mps NE
Precip.: n/a
Humidity: 31%
Cloud cover: 71%

Fri Dec 5

67°F

Sky Is Clear
Min: 47°F
Max: 68°F

Calm: 4 mps W
Precip.: n/a
Humidity: 40%
Cloud cover: 6%

Sat Dec 6

66°F

Sky Is Clear
Min: 49°F
Max: 67°F

Light breeze: 4 mps W
Precip.: n/a
Humidity: 57%
Cloud cover: 6%

Sun Dec 7

66°F

Overcast Clouds
Min: 49°F
Max: 66°F

Light breeze: 4 mps W
Precip.: n/a
Humidity: 47%
Cloud cover: 98%

Mon Dec 8

67°F

Broken Clouds
Min: 49°F
Max: 67°F

Light breeze: 4 mps NNW
Precip.: n/a
Humidity: 44%
Cloud cover: 70%

Tue Dec 9

67°F

Overcast Clouds
Min: 51°F
Max: 67°F

Light breeze: 5 mps WNW
Precip.: n/a
Humidity: 50%
Cloud cover: 100%

More about 94574

About 94574

The ZIP code 94574 is associated with the city of Saint Helena in Napa County in California.

94574 Solar Energy & Power

To learn more about solar energy and solar power in 94574, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.