Total Cloudy and Foggy Days at US Cities a Year

The table below gives averages for how many days a year major cities in the United States have cloud and fog.

The figure for cloud counts the days when cloud covers at least 80 percent of the sky during daylight hours. The number averages measurements for most of the years that each city's main weather station has collected data.

The totals listed for foggy days includes days with mist. This annual average is based on weather data collected from 1961 to 1990.