May weather forecastSouth Roxana, IL
May
Weather in May
May, the last month of the spring in South Roxana, is a warm month, with an average temperature varying between 74.1°F (23.4°C) and 57°F (13.9°C).Temperature
May brings an increase in the average high-temperature, progressing from an enjoyable 64.4°F (18°C) in April to a warm 74.1°F (23.4°C). South Roxana experiences an average low-temperature of 57°F (13.9°C) in the month of May.Humidity
In May, the average relative humidity in South Roxana is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 16.6 days and typically aggregates up to 3.07" (78mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In South Roxana, the average length of the day in May is 14h and 19min.On the first day of May, sunrise is at 6:01 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:19 pm CDT.
Sunshine
In South Roxana, 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 value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
South Roxana, IL
- Average high temperature in May: 74.1°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in May: 57°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in May
South Roxana, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
South Roxana, IL
- Average wind speed in May: 7.6mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).
Average humidity in May
South Roxana, 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
South Roxana, IL
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in May
South Roxana, IL
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in May
South Roxana, IL
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
South Roxana, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (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 Roxana, 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 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in May
South Roxana, IL
- Average sunshine days in May: 12.5 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in May
South Roxana, 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
South Roxana, IL
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in May
South Roxana, 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).
