Mattoon Weather in May

May in Mattoon brings high temperatures, with daytime highs of 23°C (73°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 103 mm (4.1 in), so pack an umbrella.

Rainfall in Mattoon in May

Historically, approximately 13 days this month are expected to have rain, averaging 103 mm (4.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Mattoon in May

May in Mattoon brings high temperatures, with highs of 23°C (73°F) and nights around 12°C (54°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

For Mattoon itself, September generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.