May weather forecastTrenton, IL
May
Weather in May
The last month of the spring, May, is a moderately hot month in Trenton, Illinois, with an average temperature varying between 74.7°F (23.7°C) and 57.7°F (14.3°C).Temperature
Trenton in May sees a temperature change, with average high-temperatures moving from a refreshing 64.9°F (18.3°C) in April to a moderately hot 74.7°F (23.7°C). Throughout May, Trenton anticipates an average low-temperature of 57.7°F (14.3°C).Humidity
The average relative humidity in May is 79%.Rainfall
In Trenton, in May, it is raining for 17.3 days, with typically 3.58" (91mm) of accumulated precipitation. Throughout the year, there are 151.1 rainfall days, and 30.43" (773mm) of precipitation is accumulated.Snowfall
In Trenton, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 17min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:51 pm. On the last day of May, sunrise is at 5:36 am and sunset at 8:17 pm CDT.
Sunshine
The average sunshine in May is 9.3h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 6 in May translates into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Trenton, IL
- Average high temperature in May: 74.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in May: 57.7°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in May
Trenton, 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
Trenton, IL
- Average wind speed in May: 7.6mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in May
Trenton, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Trenton, IL
- Average rainfall in May: 3.58"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in May
Trenton, IL
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).
Average snowfall in May
Trenton, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Trenton, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (7.5 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
Trenton, IL
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in May
Trenton, IL
- Average sunshine days in May: 11.2 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).
Average UV index in May
Trenton, 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
Trenton, IL
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in May
Trenton, 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).
