Lemont Weather in May

May in Lemont averages 22°C (72°F) during the day and 10°C (50°F) at night. Quite a bit of rainfall is typical this month, with around 112 mm (4.4 in) on average. An umbrella is a good idea.

Rainfall in Lemont in May

Based on our climate data of the past 30 years, about 13 days of rain are anticipated, with 112 mm (4.4 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Lemont in May

If you're visiting Lemont in May, expect highs of 22°C (72°F) and overnight lows around 10°C (50°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 10°C (50°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Lemont in May

Expect a lot of sunshine this month, with about 282 hours of sun. These sunny conditions add to the overall experience.

For Lemont 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.