Typical Weather in Mount Vernon, IL in May
74° F Avg High
54° F Avg Low
8 Rainy Days
☀️ Temperature Summary
May is a popular time to visit, with an inviting climate featuring warm temperatures. Highs in May are typically around 74°F, which is warmer than usual in Mount Vernon. Lows overnight are typically around 54°F. Temperatures will generally increase as the month goes on, with daily high temperatures ranging between 70°F and 79°F.
May is a great time to visit Mount Vernon, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
You can expect about a 26% chance of rain for any given day in May. It's one of the rainier months of the year for Mount Vernon, with total rainfall for the month around 5 inches.
Rainfall Throughout the Year
Planning a trip to Mount Vernon? Try our free trip weather planner