Based on the information you've provided, it's not possible to determine the exact number of cities that had snowfall of at least 26 centimeters. However, if you're looking for general trends, you can count the number of cities represented in the categories provided (e.g., 26 cm, 32 cm, 38 cm, etc.).
If you have a graph or specific data points showing the number of cities that experienced different snowfall amounts, you could look for all the categories from 26 cm and above to find the total number of cities.
If you can provide the actual values or a more detailed context, I could assist you further!