Londoners can expect sunny skies and mild temperatures Saturday, with a high of 18 C, according to Environment Canada. Clear skies are expected to continue into the evening, with temperatures dropping to a low of 3 C overnight. Fog patches are expected to develop overnight. Sunday will bring more sunshine, with a high of 19 C. Skies are expected to become a mix of sun and cloud in the afternoon, with fog patches dissipating in the morning. Cloudy periods are expected Sunday night, with a low of 7 C.