It's Sidewalk Egg-Frying Day!
With the predicted temps in the mid-70s on Monday, it's highly unlikely that anyone will be frying eggs on sidewalks this week.
Last week maybe, but not today. Not in Columbus at least. Even Phoenix, Arizona is experiencing unusually cool weather with today's temp in the High 90s.
When I lived there, you could literally go outside at 2 am and it would be nearly 90 degrees out with no sunlight to be found, so high 90s during the daytime is good weather in the desert.
According to the Library of Congress, it's possible, but not probable, that you could fry an egg on a sidewalk during a hot day.
Eggs need to reach a temperature of 158*F to cook through. Sidewalks can usually get up to 145*F.
The hotter the day, the more likely your egg will fry. If you're planning to consume it afterward, however, you may not want to literally put it on the sidewalk--but in a cast iron skillet.