Typical Weather in Mount Vernon, IL in October
68° F Avg High
44° F Avg Low
6 Rainy Days
☀️ Temperature Summary
Highs in October are typically around 68°F, which is warmer than usual in Mount Vernon. You can expect overnight lows near 44°F most days. Temperatures will usually fall as the month goes on, with daily high temperatures ranging between 73°F and 61°F.
October 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 19% chance of rain for any given day in October. It's one of the drier months of the year for Mount Vernon, with total rainfall for the month around 3 inches.
Rainfall Throughout the Year
Planning a trip to Mount Vernon? Try our free trip weather planner