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What's five times hotter than the sun and capable of sending a DeLorean back to the future? Yep, the answer is a bolt of lightning, which can reach temperatures of roughly 30,000 kelvins (53,540 degrees Fahrenheit). The sun, on the other hand, is eclipsed in this case - its surface temperature is just 6,000 kelvins (10,340 degrees Fahrenheit).
While not an exact science, since humidity has slight effects on the speed of sound, since actual temperature may be above or below 70Â° F, and since the discharge of lightning is highly unpredictable, this calculation does allow one to quickly estimate his or her distance from a storm.