United StatesAverage weather for Romeoville in May
It's pleasantly warm in May in Romeoville with an average temperature of 22°C. Temperatures this month range from a low of 17°C to a high of 28°C. At night, you can expect temperatures between 7°C and 17°C.
Start of May
The month of May starts in Romeoville with mild temps, averaging around 19°C during the day and nights around 9°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid May
By mid-May, daytime temps rise to around 21°C, with nights around 11°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in Romeoville is around 26°C, while nighttime temps are about 15°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Because temperatures drop in the evening, wearing layers is recommended.
In May, there is an average of 112 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Romeoville in May |
New York | ||
|---|---|---|---|
 Average temperature |
22°C | 22°C | |
 Max. temperature |
28°C | 28°C | |
| Min. temperature |
17°C | -5°C | |
 Total precipitation |
112 mm | 105 mm | |
| Rainy days |
8 days | 14 days | |
April
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Romeoville?
Looking for sun? May isn’t a good month to be in Romeoville. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 35°C in 2018, Romeoville reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 6°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 21°C.
Check out the climate of Romeoville for all months and discover the best travel time
Daily Temperature in May in Romeoville
This chart shows the average daily high and low temperatures in May for Romeoville, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Romeoville
The chart below shows the average daily precipitation in May for Romeoville, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 8 days of precipitation in Romeoville.
Daily UV index in May in Romeoville
This chart shows the average daily UV index in May in Romeoville, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Romeoville over the years
This chart shows the average temperature in May in Romeoville, measured in degrees Celsius, over the past few years.
Total precipitation in May in Romeoville over the years
This chart shows the average precipitation in May in Romeoville, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Romeoville
Click on any day in May to get detailed info about the usual weather on that day in Romeoville. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Romeoville
Have you been to Romeoville in May?
Share your weather experience in May in Romeoville.
Average weather in Romeoville by month
Click on a month below to see detailed weather info for Romeoville. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Romeoville for all months at once
