Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's onset brings a temperature rise, moving from a refreshing 66.2°F (19°C) in April to a warm 75.7°F (24.3°C). Grand Tower in May experiences a low-temperature average of 58.3°F (14.6°C).Humidity
With an average relative humidity of 79%, May is the most humid month in Grand Tower, Illinois.Rainfall
In Grand Tower, in May, it is raining for 17.1 days, with typically 3.82" (97mm) of accumulated precipitation. In Grand Tower, Illinois, during the entire year, the rain falls for 158.6 days and collects up to 34.69" (881mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Grand Tower, the average length of the day in May is 14h and 13min.On the first day of May in Grand Tower, Illinois, sunrise is at 6:01 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:13 pm CDT.
Sunshine
The average sunshine in May is 9.3h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 6 in May interprets into the following advice:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Grand Tower in May?
What is the most humid month in Grand Tower?
What is the average humidity in May in Grand Tower?
How many days does it rain in May in Grand Tower?
When it does not snow in Grand Tower?
Does it snow in Grand Tower in May?
How many hours of daylight does Grand Tower have in May?
When is the sunrise / sunset in May in Grand Tower?
How many hours of sunshine does Grand Tower have in May?
When is the highest UV index in Grand Tower?
What is the UV index intensity in May in Grand Tower?
Average temperature in May
Grand Tower, IL
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in May: 58.3°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in May
Grand Tower, IL
- Average pressure in May: 29.97"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
Grand Tower, IL
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in May
Grand Tower, IL
- Average humidity in May: 79%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Grand Tower, IL
- Average rainfall in May: 3.82"
The wettest month (with the highest rainfall) is April (4.49").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Grand Tower, IL
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in May
Grand Tower, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Grand Tower, IL
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and February (4.8 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
Grand Tower, IL
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Grand Tower, IL
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in May
Grand Tower, IL
- Average UV index in May: 6
The months with the highest UV index are May, 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
Grand Tower, IL
- Average cloud cover in May: 38
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility in May
Grand Tower, 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).
Grand Tower, Illinois, USA
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