Environment Canada (EC) has issued a frost advisory for the area.
"Clear skies and light winds will allow temperatures to drop to below zero in most regions," EC said in a release.
"Patchy to widespread frost is expected Tuesday night and into Wednesday morning."
The advisory is in place for Edmonton, Sherwood Park, Fort Saskatchewan, Bruderheim, Lamont, Morinville, Bon Accord and Gibbons.
View the area's forecast, here.