Solar Energy & Solar Power Resources

Solar Power in 91021 (Montrose, CA)

Solar Energy in 91021

Sorry, historical solar radition values for 91021 are currently unavailable, please check back later.

Solar Panels in 91021

Solar panels in 91021 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 91021

The total length of the day in 91021 (Montrose, CA) today (July 20, 2026) will be 14 hours and 10 minutes. [More]

Solar Energy in 91021 (Montrose, CA)

Solar Energy Data for 91021

See the chart below to see how different types of solar panel installations compare in 91021.

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

Solar Energy Analysis for 91021

Sorry, it is not possible to complete our solar energy analysis for 91021 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 91021

Solar Radiation Data in 91021

See the chart below for monthly solar radiation levels in 91021.

Sorry, data is not currently available.

Solar Radiation Analysis for 91021

Sorry, it is not possible to complete our solar radiation analysis for 91021 at this time.

Historical solar radiation data for 91021 is not currently available.

Please check back later.

Solar Power Comparison: 91021 vs. the U.S.

Solar Power Levels in 91021

Sorry, solar radiation data for 91021 is not currently available.

Solar Power: 91021 vs. the U.S.

Below is a month-by-month comparison of how average 91021 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 91021

Sunrise / Sunset in 91021

Sunrise/Sunset for July 20, 2026 ^[2]
- Sunrise: 5:54 am
- Sunset: 8:04 pm
- Length of Day: 14:10

Best Months for Solar in 91021

Monthly data not currently available.

Solar Panel Installs in 91021

We do not have data on solar panel installations in ZIP Code 91021 at the current time.

Solar Power Output in 91021

The Power of Solar in 91021

Monthly AC solar system output averages for 91021. Month-by-month solar power, as ranked by AC output, in 91021. ^[2]

AC output data is not currently available.

Solar Output Analysis for 91021

Sorry, it is not possible to complete our solar radiation analysis for 91021 at this time.

Historical solar radiation data for 91021 is not currently available.

Please check back later.

Weather Forecast for 91021 ^[5]

Mon Jul 20

85°F

Overcast Clouds
Min: 67°F
Max: 86°F

Gentle Breeze: 8 mps S
Precip.: n/a
Humidity: 45%
Cloud cover: 89%

Tue Jul 21

88°F

Sky Is Clear
Min: 67°F
Max: 91°F

Gentle Breeze: 9 mps SSW
Precip.: n/a
Humidity: 31%
Cloud cover: 6%

Wed Jul 22

87°F

Sky Is Clear
Min: 66°F
Max: 91°F

Gentle Breeze: 9 mps SW
Precip.: n/a
Humidity: 33%
Cloud cover: 0%

Thu Jul 23

94°F

Sky Is Clear
Min: 76°F
Max: 97°F

Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 27%
Cloud cover: 0%

Fri Jul 24

93°F

Sky Is Clear
Min: 79°F
Max: 99°F

Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 29%
Cloud cover: 1%

Sat Jul 25

94°F

Sky Is Clear
Min: 79°F
Max: 99°F

Gentle Breeze: 8 mps SSW
Precip.: n/a
Humidity: 24%
Cloud cover: 4%

More about 91021

About 91021

The ZIP code 91021 is associated with the city of Montrose in Los Angeles County in California.

91021 Solar Energy & Power

To learn more about solar energy and solar power in 91021, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.