Solar Energy & Solar Power Resources

Solar Power in 98611 (Castle Rock, WA)

Solar Energy in 98611

Sorry, historical solar radition values for 98611 are currently unavailable, please check back later.

Solar Panels in 98611

Solar panels in 98611 that will produce the maximum solar energy output. [More]

Sunrise & Sunset in 98611

The total length of the day in 98611 (Castle Rock, WA) today (September 16, 2026) will be 12 hours and 33 minutes. [More]

Solar Energy in 98611 (Castle Rock, WA)

Solar Energy Data for 98611

See the chart below to see how different types of solar panel installations compare in 98611.

Historical solar power output data for Castle Rock is not currently available.

Solar Energy Analysis for 98611

Sorry, it is not possible to complete our solar energy analysis for 98611 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 98611

Solar Radiation Data in 98611

See the chart below for monthly solar radiation levels in 98611.

Sorry, data is not currently available.

Solar Radiation Analysis for 98611

Sorry, it is not possible to complete our solar radiation analysis for 98611 at this time.

Historical solar radiation data for 98611 is not currently available.

Please check back later.

Solar Power Comparison: 98611 vs. the U.S.

Solar Power Levels in 98611

Sorry, solar radiation data for 98611 is not currently available.

Solar Power: 98611 vs. the U.S.

Below is a month-by-month comparison of how average 98611 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 Washington is not currently available.

Solar Data & Statistics for 98611

Sunrise / Sunset in 98611

Sunrise/Sunset for September 16, 2026 ^[2]
- Sunrise: 6:49 am
- Sunset: 7:22 pm
- Length of Day: 12:33

Best Months for Solar in 98611

Monthly data not currently available.

Solar Panel Installs in 98611

We do not have data on solar panel installations in ZIP Code 98611 at the current time.

Solar Power Output in 98611

The Power of Solar in 98611

Monthly AC solar system output averages for 98611. Month-by-month solar power, as ranked by AC output, in 98611. ^[2]

AC output data is not currently available.

Solar Output Analysis for 98611

Sorry, it is not possible to complete our solar radiation analysis for 98611 at this time.

Historical solar radiation data for 98611 is not currently available.

Please check back later.

Weather Forecast for 98611 ^[5]

Wed Sep 16

76°F

Sky Is Clear
Min: 51°F
Max: 76°F

Gentle Breeze: 10 mps N
Precip.: n/a
Humidity: 53%
Cloud cover: 0%

Thu Sep 17

79°F

Sky Is Clear
Min: 54°F
Max: 81°F

Light breeze: 7 mps N
Precip.: n/a
Humidity: 45%
Cloud cover: 0%

Fri Sep 18

68°F

Few Clouds
Min: 53°F
Max: 73°F

Light breeze: 5 mps SSW
Precip.: n/a
Humidity: 55%
Cloud cover: 13%

Sat Sep 19

69°F

Sky Is Clear
Min: 48°F
Max: 74°F

Light breeze: 5 mps NNE
Precip.: n/a
Humidity: 56%
Cloud cover: 2%

Sun Sep 20

71°F

Sky Is Clear
Min: 50°F
Max: 74°F

Light breeze: 7 mps N
Precip.: n/a
Humidity: 54%
Cloud cover: 3%

Mon Sep 21

70°F

Overcast Clouds
Min: 51°F
Max: 71°F

Light breeze: 6 mps NNW
Precip.: n/a
Humidity: 56%
Cloud cover: 100%

More about 98611

About 98611

The ZIP code 98611 is associated with the city of Castle Rock in Cowlitz County in Washington.

98611 Solar Energy & Power

To learn more about solar energy and solar power in 98611, or for more solar-related resources for WA, check out the U.S. Energy Information Administration.