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
South Jacksonville's transition into May is marked by a rise in the average high-temperature, advancing from a comfortable 63.3°F (17.4°C) in April to a pleasant 72.9°F (22.7°C). Nighttime temperatures in May average to a moderate 55.9°F (13.3°C).Humidity
In May, the average relative humidity is 79%.Rainfall
In South Jacksonville, Illinois, during May, the rain falls for 18 days and regularly aggregates up to 3.46" (88mm) of precipitation. In South Jacksonville, Illinois, during the entire year, the rain falls for 148.2 days and collects up to 29.37" (746mm) of precipitation.Snowfall
In South Jacksonville, snow does not fall in May through September.Daylight
In South Jacksonville, the average length of the day in May is 14h and 23min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:55 pm. On the last day of May, in South Jacksonville, sunrise is at 5:35 am and sunset at 8:22 pm CDT.
Sunshine
In May, the average sunshine in South Jacksonville is 9.3h.UV index
In South Jacksonville, Illinois, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Heed the precautions - Suggestions to avoid sunburn are made. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
What is the usual temperature for South Jacksonville in May?
What is the average humidity in May in South Jacksonville?
How many days does it rain in May in South Jacksonville?
When it does not snow in South Jacksonville?
Does it snow in South Jacksonville in May?
How many hours of daylight does South Jacksonville have in May?
What time are sunrise and sunset in May in South Jacksonville?
How many hours of sunshine does South Jacksonville have in May?
What is the UV index reading in May in South Jacksonville?
Average temperature in May
South Jacksonville, IL
- Average high temperature in May: 72.9°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in May: 55.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in May
South Jacksonville, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
South Jacksonville, IL
- Average wind speed in May: 8.2mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in May
South Jacksonville, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
South Jacksonville, IL
- Average rainfall in May: 3.46"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in May
South Jacksonville, IL
- Average rainfall days in May: 18 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and February (7.1 days).
Average snowfall in May
South Jacksonville, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
South Jacksonville, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (9.6 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
South Jacksonville, IL
- Average daylight in May: 14h and 2min
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 24min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in May
South Jacksonville, IL
- Average sunshine days in May: 11 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in May
South Jacksonville, 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
South Jacksonville, IL
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in May
South Jacksonville, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
South Jacksonville, Illinois, USA
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