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 (September 18, 2025) will be 12 hours and 19 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.

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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 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 September 18, 2025 ^[2]
- Sunrise: 6:30 am
- Sunset: 6:49 pm
- Length of Day: 12:19

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]

Thu Sep 18

70°F

Moderate Rain
Min: 58°F
Max: 73°F

Gentle Breeze: 10 mps WSW
Precip.: Chance of Rain
Humidity: 81%
Cloud cover: 59%

Fri Sep 19

74°F

Sky Is Clear
Min: 59°F
Max: 77°F

Gentle Breeze: 10 mps WSW
Precip.: n/a
Humidity: 49%
Cloud cover: 0%

Sat Sep 20

78°F

Sky Is Clear
Min: 61°F
Max: 80°F

Gentle Breeze: 12 mps W
Precip.: n/a
Humidity: 31%
Cloud cover: 0%

Sun Sep 21

76°F

Light Rain
Min: 61°F
Max: 76°F

Gentle Breeze: 8 mps WNW
Precip.: Chance of Rain
Humidity: 26%
Cloud cover: 6%

Mon Sep 22

80°F

Light Rain
Min: 64°F
Max: 84°F

Gentle Breeze: 9 mps WNW
Precip.: Chance of Rain
Humidity: 36%
Cloud cover: 27%

Tue Sep 23

77°F

Light Rain
Min: 62°F
Max: 81°F

Gentle Breeze: 11 mps W
Precip.: Chance of Rain
Humidity: 46%
Cloud cover: 9%

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.