[header] How to fry an egg on the sidewalk [title] Wait for a very hot day. [step] The hotter it is, the more likely your egg will fry. If possible, choose a day when the temperature is 100 ° f (38 ° c) or hotter. 
Make sure the sun is out, too, since you'll need its rays to completely heat up the metal pan or tin foil you're using. [substeps] On cloudy days, even very hot ones, the metal won't get hot enough to cook an egg.