Solar Energy & Solar Power Resources

Solar Power in 94581 (Napa, CA)

Solar Energy in 94581

Sorry, historical solar radition values for 94581 are currently unavailable, please check back later.

Solar Panels in 94581

Solar panels in 94581 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 94581

The total length of the day in 94581 (Napa, CA) today (March 11, 2025) will be 11 hours and 50 minutes. [More]

Solar Energy in 94581 (Napa, CA)

Solar Energy Data for 94581

See the chart below to see how different types of solar panel installations compare in 94581.

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

Solar Energy Analysis for 94581

Sorry, it is not possible to complete our solar energy analysis for 94581 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 94581

Solar Radiation Data in 94581

See the chart below for monthly solar radiation levels in 94581.

Sorry, data is not currently available.

Solar Radiation Analysis for 94581

Sorry, it is not possible to complete our solar radiation analysis for 94581 at this time.

Historical solar radiation data for 94581 is not currently available.

Please check back later.

Solar Power Comparison: 94581 vs. the U.S.

Solar Power Levels in 94581

Sorry, solar radiation data for 94581 is not currently available.

Solar Power: 94581 vs. the U.S.

Below is a month-by-month comparison of how average 94581 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 94581

Sunrise / Sunset in 94581

Sunrise/Sunset for March 11, 2025 ^[2]
- Sunrise: 7:23 am
- Sunset: 7:13 pm
- Length of Day: 11:50

Best Months for Solar in 94581

Monthly data not currently available.

Solar Panel Installs in 94581

We do not have data on solar panel installations in ZIP Code 94581 at the current time.

Solar Power Output in 94581

The Power of Solar in 94581

Monthly AC solar system output averages for 94581. Month-by-month solar power, as ranked by AC output, in 94581. ^[2]

AC output data is not currently available.

Solar Output Analysis for 94581

Sorry, it is not possible to complete our solar radiation analysis for 94581 at this time.

Historical solar radiation data for 94581 is not currently available.

Please check back later.

Weather Forecast for 94581 ^[5]

Tue Mar 11

63°F

Sky Is Clear
Min: 44°F
Max: 63°F

Gentle Breeze: 12 mps SW
Precip.: n/a
Humidity: 48%
Cloud cover: 0%

Wed Mar 12

53°F

Heavy Intensity Rain
Min: 42°F
Max: 53°F

Fresh Breeze: 19 mps S
Precip.: Chance of Rain
Humidity: 87%
Cloud cover: 100%

Thu Mar 13

52°F

Light Rain
Min: 40°F
Max: 54°F

Moderate breeze: 14 mps W
Precip.: Chance of Rain
Humidity: 55%
Cloud cover: 81%

Fri Mar 14

47°F

Heavy Intensity Rain
Min: 40°F
Max: 55°F

Gentle Breeze: 9 mps ESE
Precip.: Chance of Rain
Humidity: 93%
Cloud cover: 100%

Sat Mar 15

55°F

Light Rain
Min: 42°F
Max: 57°F

Light breeze: 7 mps SW
Precip.: Chance of Rain
Humidity: 71%
Cloud cover: 92%

Sun Mar 16

56°F

Moderate Rain
Min: 48°F
Max: 56°F

Moderate breeze: 14 mps SW
Precip.: Chance of Rain
Humidity: 74%
Cloud cover: 100%

More about 94581

About 94581

The ZIP code 94581 is associated with the city of Napa in Napa County in California.

94581 Solar Energy & Power

To learn more about solar energy and solar power in 94581, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.