Romeoville Weather in May

May in Romeoville brings high temperatures, with highs of 22°C (72°F) and nights dropping to 10°C (50°F). Rainfall is on the higher side this month, averaging around 110 mm (4.3 in), so keep a rain jacket handy.

Rainfall in Romeoville in May

You can expect rain on around 13 days based on historical patterns, with 110 mm (4.3 in) average for the month. 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 Romeoville in May

Expect highs of 22°C (72°F) in Romeoville in May, with nights dropping to around 10°C (50°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 10°C (50°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Romeoville in May

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

If you prefer dry days with pleasant temperatures, September typically offers 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.