Visiting local bars in St. Paul is better when you know what the weather holds. These rainfall averages and temperatures can help you decide the best time for bar-hopping. The hottest months are usually July and August, with an average temperature of 21°C, while the coldest months are January and February, with an average of 4°C. The snowiest months in St. Paul are January, December, February and March, with each month seeing an average of 14 cm of snowfall.