Also known as Keraunophobia.   Ask me how I know.   

Anyone suffering from it should not consider relocating to my home state.

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Florida has the highest frequency of lightning in the United States. There, sea breezes from the Atlantic Ocean and Gulf of Mexico converge over solar-heated land. This lifts the moist air masses that host thunderstorms. Florida is also the state with the highest number of deaths from lightning strikes.

2 hours ago, Carlos Hazday said:

Florida is also the state with the highest number of deaths from lightning strikes.

This would seem to indicate a fear of lightning is NOT a phobia, since a phobia is an unreasoning fear. Actually seems pretty reasonable.

44 minutes ago, Kitt said:

This would seem to indicate a fear of lightning is NOT a phobia, since a phobia is an unreasoning fear. Actually seems pretty reasonable.

We had our daily afternoon thunderstorm early today. It's a typical summer event you can almost set your nap time to. It got dark, thunder rumbled, and we got a little rain. An hour later, the sky's now more blue than gray.

1 hour ago, drpaladin said:

From 2001 to 2010, there were only 280 deaths or injuries from lightning in the US. This translates to a 1 in 1.1 million chance. This assumes you aren't running around with a twenty foot metal pole in a lightning storm.

If you're afraid of lightning because of danger, then you should run with terror from any motor vehicle. The chance of dying in a motor vehicle accident are 1 in 114.

A phobia is an abnormal or excessive fear though.   I know that a spider is quite unlikely to kill me, especially with our current level of medicine, and that they are even beneficial in killing other insects.  But if I see one on my kitchen floor, I will still jump about a foot in the air, and kill it with extreme force and malice.