Solar Energy & Solar Power Resources

Solar Power in 91785 (Upland, CA)

Solar Energy in 91785

Sorry, historical solar radition values for 91785 are currently unavailable, please check back later.

Solar Panels in 91785

Solar panels in 91785 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 91785

The total length of the day in 91785 (Upland, CA) today (December 14, 2025) will be 9 hours and 56 minutes. [More]

Solar Energy in 91785 (Upland, CA)

Solar Energy Data for 91785

See the chart below to see how different types of solar panel installations compare in 91785.

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

Solar Energy Analysis for 91785

Sorry, it is not possible to complete our solar energy analysis for 91785 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 91785

Solar Radiation Data in 91785

See the chart below for monthly solar radiation levels in 91785.

Sorry, data is not currently available.

Solar Radiation Analysis for 91785

Sorry, it is not possible to complete our solar radiation analysis for 91785 at this time.

Historical solar radiation data for 91785 is not currently available.

Please check back later.

Solar Power Comparison: 91785 vs. the U.S.

Solar Power Levels in 91785

Sorry, solar radiation data for 91785 is not currently available.

Solar Power: 91785 vs. the U.S.

Below is a month-by-month comparison of how average 91785 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 91785

Sunrise / Sunset in 91785

Sunrise/Sunset for December 14, 2025 ^[2]
- Sunrise: 6:47 am
- Sunset: 4:43 pm
- Length of Day: 9:56

Best Months for Solar in 91785

Monthly data not currently available.

Solar Panel Installs in 91785

We do not have data on solar panel installations in ZIP Code 91785 at the current time.

Solar Power Output in 91785

The Power of Solar in 91785

Monthly AC solar system output averages for 91785. Month-by-month solar power, as ranked by AC output, in 91785. ^[2]

AC output data is not currently available.

Solar Output Analysis for 91785

Sorry, it is not possible to complete our solar radiation analysis for 91785 at this time.

Historical solar radiation data for 91785 is not currently available.

Please check back later.

Weather Forecast for 91785 ^[5]

Sun Dec 14

70°F

Scattered Clouds
Min: 63°F
Max: 73°F

Light breeze: 5 mps SW
Precip.: n/a
Humidity: 54%
Cloud cover: 40%

Mon Dec 15

74°F

Sky Is Clear
Min: 62°F
Max: 76°F

Light breeze: 7 mps NNE
Precip.: n/a
Humidity: 14%
Cloud cover: 0%

Tue Dec 16

76°F

Broken Clouds
Min: 64°F
Max: 78°F

Light breeze: 7 mps NNE
Precip.: n/a
Humidity: 11%
Cloud cover: 81%

Wed Dec 17

70°F

Broken Clouds
Min: 62°F
Max: 75°F

Light breeze: 6 mps NNE
Precip.: n/a
Humidity: 27%
Cloud cover: 68%

Thu Dec 18

73°F

Few Clouds
Min: 63°F
Max: 79°F

Gentle Breeze: 8 mps NNE
Precip.: n/a
Humidity: 31%
Cloud cover: 17%

Fri Dec 19

69°F

Overcast Clouds
Min: 61°F
Max: 72°F

Light breeze: 6 mps SSW
Precip.: n/a
Humidity: 37%
Cloud cover: 97%

More about 91785

About 91785

The ZIP code 91785 is associated with the city of Upland in San Bernardino County in California.

91785 Solar Energy & Power

To learn more about solar energy and solar power in 91785, or for more solar-related resources for CA, check out the U.S. Energy Information Administration.