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 weather in May presents a rise in the average high-temperature, moving from an enjoyable 63.3°F (17.4°C) in April to an agreeable 72.9°F (22.7°C). South Jacksonville records an average temperature drop to a mild 55.9°F (13.3°C) in May.Humidity
The average relative humidity in May 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, during the entire year, the rain falls for 148.2 days and collects up to 29.37" (746mm) of precipitation.Snowfall
May through September are months without snowfall in South Jacksonville.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, sunrise is at 5:35 am and sunset at 8:22 pm CDT.
Sunshine
The average sunshine in May in South Jacksonville is 9.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Heed the precautions - Suggestions to avoid sunburn are made. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
Does it snow in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
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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