Solar Energy & Solar Power Resources

Solar Power in 91931 (Guatay, CA)

Solar Energy in 91931

Sorry, historical solar radition values for 91931 are currently unavailable, please check back later.

Solar Panels in 91931

Solar panels in 91931 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 91931

The total length of the day in 91931 (Guatay, CA) today (October 29, 2025) will be 10 hours and 59 minutes. [More]

Solar Energy in 91931 (Guatay, CA)

Solar Energy Data for 91931

See the chart below to see how different types of solar panel installations compare in 91931.

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

Solar Energy Analysis for 91931

Sorry, it is not possible to complete our solar energy analysis for 91931 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 91931

Solar Radiation Data in 91931

See the chart below for monthly solar radiation levels in 91931.

Sorry, data is not currently available.

Solar Radiation Analysis for 91931

Sorry, it is not possible to complete our solar radiation analysis for 91931 at this time.

Historical solar radiation data for 91931 is not currently available.

Please check back later.

Solar Power Comparison: 91931 vs. the U.S.

Solar Power Levels in 91931

Sorry, solar radiation data for 91931 is not currently available.

Solar Power: 91931 vs. the U.S.

Below is a month-by-month comparison of how average 91931 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 91931

Sunrise / Sunset in 91931

Sunrise/Sunset for October 29, 2025 ^[2]
- Sunrise: 7:00 am
- Sunset: 5:59 pm
- Length of Day: 10:59

Best Months for Solar in 91931

Monthly data not currently available.

Solar Panel Installs in 91931

We do not have data on solar panel installations in ZIP Code 91931 at the current time.

Solar Power Output in 91931

The Power of Solar in 91931

Monthly AC solar system output averages for 91931. Month-by-month solar power, as ranked by AC output, in 91931. ^[2]

AC output data is not currently available.

Solar Output Analysis for 91931

Sorry, it is not possible to complete our solar radiation analysis for 91931 at this time.

Historical solar radiation data for 91931 is not currently available.

Please check back later.

Weather Forecast for 91931 ^[5]

Wed Oct 29

72°F

Sky Is Clear
Min: 43°F
Max: 81°F

Gentle Breeze: 10 mps ENE
Precip.: n/a
Humidity: 12%
Cloud cover: 0%

Thu Oct 30

79°F

Sky Is Clear
Min: 42°F
Max: 80°F

Gentle Breeze: 11 mps W
Precip.: n/a
Humidity: 11%
Cloud cover: 0%

Fri Oct 31

74°F

Overcast Clouds
Min: 55°F
Max: 75°F

Gentle Breeze: 10 mps W
Precip.: n/a
Humidity: 15%
Cloud cover: 92%

Sat Nov 1

76°F

Sky Is Clear
Min: 54°F
Max: 77°F

Light breeze: 4 mps E
Precip.: n/a
Humidity: 16%
Cloud cover: 0%

Sun Nov 2

73°F

Broken Clouds
Min: 56°F
Max: 76°F

Light breeze: 5 mps ENE
Precip.: n/a
Humidity: 20%
Cloud cover: 64%

Mon Nov 3

73°F

Sky Is Clear
Min: 55°F
Max: 75°F

Light breeze: 7 mps WSW
Precip.: n/a
Humidity: 22%
Cloud cover: 1%

More about 91931

About 91931

The ZIP code 91931 is associated with the city of Guatay in San Diego County in California.

91931 Solar Energy & Power

To learn more about solar energy and solar power in 91931, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.