May weather forecastSaint Elmo, IL
May
Weather in May
The last month of the spring, May, is a warm month in Saint Elmo, Illinois, with an average temperature fluctuating between 57°F (13.9°C) and 73.4°F (23°C).Temperature
The shift from April to May sees an increase in the average high-temperature, transitioning from an enjoyable 63.5°F (17.5°C) to a warm 73.4°F (23°C). During the month of May, an average low-temperature of 57°F (13.9°C) is recorded.Humidity
The average relative humidity in May is 80%.Rainfall
In Saint Elmo, in May, during 15.7 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Saint Elmo, during the entire year, the rain falls for 139.3 days and collects up to 23.94" (608mm) of precipitation.Snowfall
In Saint Elmo, Illinois, snow does not fall in May through October.Daylight
In Saint Elmo, the average length of the day in May is 14h and 20min.On the first day of May, sunrise is at 5:56 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:14 pm CDT.
Sunshine
The average sunshine in May in Saint Elmo is 9h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: In May, a daily maximum UV index of 5 leads to the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Elmo, IL
- Average high temperature in May: 73.4°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in May: 57°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in May
Saint Elmo, IL
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Saint Elmo, IL
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in May
Saint Elmo, IL
- Average humidity in May: 80%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Saint Elmo, IL
- Average rainfall in May: 2.56"
The wettest months (with the highest rainfall) are April and June (2.95").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in May
Saint Elmo, IL
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
Saint Elmo, IL
- Average snowfall in May: 0"
The month with the highest snowfall is December (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Saint Elmo, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Saint Elmo, IL
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in May
Saint Elmo, IL
- Average sunshine days in May: 12.3 days
The months with the most sunshine days are January and November (19.5 days).
The months with the least sunshine days are May and July (12.3 days).
Average UV index in May
Saint Elmo, IL
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Saint Elmo, IL
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in May
Saint Elmo, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
