Climate makes Foster City a great place to live, work and play!

Foster City enjoys a marine-like climate characterized by mild and moderately wet winters and by dry, cool summers. The daily and annual range in temperature is small. A few frosty mornings occur during the winter. Winter temperatures normally rise to the high fifties in the early afternoon. The summer weather is dominated by a cool sea breeze. Low overcast often occurs for a few hours in the morning. Summer nights are comfortably cool, with minimum temperatures averaging in the fifties. The average minimum and maximum temperature range is 47.1 to 71 degrees farenheit. Average rainfall is less than 20 inches per year.