May weather forecastSaint Augustine, IL
May
Weather in May
The last month of the spring, May, is an agreeable month in Saint Augustine, Illinois, with an average temperature fluctuating between 71.1°F (21.7°C) and 54.5°F (12.5°C).Temperature
Saint Augustine in May shows a temperature shift, moving from an average high of a mild 60.4°F (15.8°C) in April to an agreeable 71.1°F (21.7°C). Saint Augustine, during the month of May, experiences an average low-temperature of 54.5°F (12.5°C).Humidity
The average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 2.2" (56mm) of precipitation.Snowfall
In Saint Augustine, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 5:59 am and sunset at 7:58 pm. On the last day of May, in Saint Augustine, sunrise is at 5:32 am and sunset at 8:26 pm CDT.
Sunshine
In Saint Augustine, the average sunshine in May is 8.9h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during May leads to these advisories:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Augustine, IL
- Average high temperature in May: 71.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in May: 54.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in May
Saint Augustine, IL
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Saint Augustine, IL
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in May
Saint Augustine, IL
- Average humidity in May: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Saint Augustine, IL
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are January and December (0.59").
Average rainfall days in May
Saint Augustine, IL
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in May
Saint Augustine, IL
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Saint Augustine, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.3 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
Saint Augustine, IL
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 54min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Saint Augustine, IL
- Average sunshine days in May: 11.9 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in May
Saint Augustine, 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
Saint Augustine, IL
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in May
Saint Augustine, IL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
