Pennsylvania Sunlight Hours & Renewable Energy Information

Pennslyvania Sun Light Hours Map

Quick Green Energy Summary for Pennsylvania


State Sunlight Rank: 44/50

Average Annual Sunlight Hours: 2600 hours

Clear Days: 87 days per year

Summer Peak Sun Hours: 4.44 hours per day

Winter Peak Sun Hours: 2.78 hours per day

Average Peak Sun Hours : 3.91 hours per day


State Wind Rank : 41/50

Average Annual Wind Speed: 0.03 miles per hour

More Information on Pennsylvania Green Energy

Pennsylvania ranks very low in average peak sun hours per day in the United States, but that does not mean that there is not enough sun to use solar power as an alternative source of energy in the many great cities of the keystone state.

Philadelphia receives the highest average of daily peak sun hours, being located in the South and Eastern tip of the state. But other cities, like Pittsburgh, and Erie along the lake still receive high enough peak sun hours to make a solar a legitimate source of renewable energy.

Net metering is available in Pennsylvania, and the local government has set in place a plan and incentives to mandate certain usage of renewable energies over fossil fuels in the future. Pennsylvania, a beautiful and historic state in the United States with such a crucial historical impact is slowly doing its part to realize the advantages of solar power.

Using averages from a fixed solar panel, there are 3.91 hours of peak sun light across the state of Pennsylvania. This number would vary if you were using a 1-Axis or 2-Axis tilt panel.

Taking the average daily sun light hours works well for looking at long term calculations in your area. On a daily basis this number will fluctuate due to several outside variables. For example, on a cloudy day in the winter this number would be low, but on a sunny day in the summer this number could be much higher. Looking at an average will help you calculate and plan for the output and best hours of solar insolation you can expect from your solar panels in Pennsylvania throughout the year.