Affected by stable weather, 10 fog events occurred continuously in Jinan from 19 December 2016 to 9 January 2017, during which the minimum visibility was less than 50 m. The circulation pattern, fog type, and microphysical characteristics of winter fog in Jinan are analyzed by using the observation data of fog droplet spectrometers, intensified data of automatic weather stations, NCEP/NCAR reanalysis data, and conventional observation data during the 10 fog events. The results are as follows. 1) The winter fog in Jinan is dominated by small droplet with diameter equal to or less than 8 μm, which accounts for more than 88% and has a good linear relation with NC (number concentration). 2) The spectral pattern is divided into one-peak narrow spectrum and multi-peak wide spectrum. For one-peak narrow spectrum fog, its spectral width is less than 13 μm, the proportion of small droplet is very high, the LWC (liquid water content) has a good linear relation with NC, and each microphysical quantity is small. For multi-peak wide spectrum fog, the average spectral width is greater than 34 μm, the LWC has a good linear relation with the number of large droplet whose diameter is equal to or greater than 12 μm, and each microphysical quantity is great. 3) The advection-radiation fog in Jinan has the highest NC and LWC, followed by radiation fog, and evaporation fog is the least. 4) The winter fog has obvious regional characteristics. Compared with the winter fog in Nanjing and Shanghai, the NC of winter fog in Jinan is obviously lower. 5) The LWC in radiation fog and advection-radiation fog is one to two orders of magnitude less and the spectral width is obviously small.