Weather
How Oklahoma Weather Affects Solar Production
Oklahoma throws everything at your roof. Here is what that actually means for solar panels.
Eric Huggins
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September 20, 2025
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6 min read
The Good News
Oklahoma Is Sunnier Than You Think
This is the number one question we hear: "Does Oklahoma get enough sun for solar?" The short answer is yes. Oklahoma averages 235+ sunny days per year. That puts us ahead of many states where solar is already common.
For context, Germany led the world in solar installations for over a decade. Oklahoma gets significantly more annual sunshine than Germany. The sun is not the problem here.
Even on partly cloudy days, panels still produce. Modern solar panels generate electricity from diffused light, not just direct sunlight. A cloudy day in June still outproduces a sunny day in December because of the longer daylight hours.
The real question is not whether Oklahoma has enough sun. It is whether you can afford to keep paying utility rates that climb every year while that sun hits your roof for free.
Summer Performance
Heat and Solar: What Actually Happens
Solar panels have a temperature coefficient. They lose about 0.4% output for every degree (Fahrenheit) the panel surface rises above 77°F. On a 100°F day in July, panel surface temps can reach 140°F or higher. That means roughly 10-15% less output per panel compared to rated conditions.
But here is the part people miss. Oklahoma summer days are long. You get 14+ hours of daylight in June and July. Those extra hours of production more than compensate for the heat-related efficiency dip. Summer is still your highest-producing season by a wide margin.
There is also a gap between air temperature and panel surface temperature. Panels mounted on a roof with proper airflow underneath stay cooler than panels flush-mounted. This is one reason professional installation matters. The mounting system affects long-term performance.
Bottom line: Oklahoma summers are hot. Your panels will still produce more electricity in July than any other month of the year.
Severe Weather
Hail: The Question Everyone Asks
Oklahoma is hail country. No way around it. This is the concern we hear most often, and it deserves a straight answer.
Tier 1 solar panels are tested to withstand 1-inch hail at speeds exceeding 50 mph. This is not a marketing claim. It is part of the IEC 61215 certification, an international standard that panels must pass before they can be sold. The tempered glass on a quality solar panel is significantly tougher than a standard window.
Can a massive hailstone damage a panel? In extreme cases, yes. Baseball-sized hail can damage anything on your roof, including the roof itself. But standard Oklahoma hailstorms, the kind that happen a few times per year, are well within what modern panels are designed to handle.
We only install Tier 1 panels with manufacturer warranties that cover defects for 25 years. If a panel does sustain hail damage, your homeowner's insurance covers it the same way it covers the rest of your roof.
Winter Conditions
Snow, Ice and Cold Weather
Snow in Oklahoma rarely sticks around. Most snowfall melts within a day or two, and panels mounted at an angle shed snow faster than a flat roof. The dark surface of a solar panel absorbs heat even on cold days, accelerating the melt.
Ice storms are a different story. A heavy ice storm can coat panels and temporarily halt production. There is no way around this. The good news: ice storms are infrequent and short-lived. Once the ice melts, panels return to full production immediately. There is no lasting damage.
Cold temperatures actually help panel efficiency. Solar panels perform best in cool, sunny conditions. A crisp 40°F day with clear skies is close to ideal operating temperature. Winter days are shorter, which limits total output, but the panels themselves run more efficiently than they do in summer heat.
The net effect: winter produces less electricity than summer. But production does not stop. Most systems are designed around annual output, not any single month.
Tornado Season
Tornadoes and High Winds
We live in Tornado Alley. Every structure on your property faces this risk, whether or not it has solar panels on it.
The mounting systems we install are engineered for wind loads exceeding 90 mph. Panels are bolted through the roof decking into the rafters with flashing at every attachment point. They are not going anywhere in a typical windstorm.
In a direct hit from a strong tornado, panels can sustain damage. So can the roof, the siding, the fence and everything else. This is what homeowner's insurance is for. Solar panels are covered property, just like the rest of your home. A direct tornado hit is a catastrophic event regardless of whether you have solar.
What matters: the mounting system is engineered for Oklahoma conditions. The panels are insured. And in 30+ years of solar installations across Tornado Alley, panels have proven to be as resilient as any other part of a well-built roof.
Year-Round Performance
What Seasonal Production Looks Like
Solar production varies by season. This is normal and expected. Here is what a typical Oklahoma system looks like across the year:
Strong production. Mild temps and long days. Close to peak output.
Highest production. 14+ hours of daylight outweigh heat losses.
Solid production. Cooling temps boost efficiency as days shorten.
Lowest output. Shorter days, but cold temps keep panels efficient.
Every system we design accounts for seasonal variation. We size your system based on annual production, not peak summer months. The goal is to offset your yearly electricity usage, not to produce the maximum in any single month.
Oklahoma weather is unpredictable. But solar production across a full year is remarkably consistent. The sun shows up. The panels produce. The savings add up.
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