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
An escalation in the average high-temperature is seen with the onset of May, moving from a comfortable 63.7°F (17.6°C) in April to a moderately hot 73.6°F (23.1°C). May brings an average low-temperature of 56.8°F (13.8°C) to Vandalia.Humidity
In Vandalia, the average relative humidity in May is 80%.Rainfall
In Vandalia, Illinois, during May, the rain falls for 18.3 days and regularly aggregates up to 4.09" (104mm) of precipitation. Throughout the year, there are 164.1 rainfall days, and 36.73" (933mm) of precipitation is accumulated.Snowfall
In Vandalia, Illinois, snow does not fall in May through October.Daylight
The average length of the day in May in Vandalia is 14h and 19min.On the first day of the month, sunrise is at 5:57 am and sunset at 7:49 pm. On the last day of May, in Vandalia, sunrise is at 5:32 am and sunset at 8:15 pm CDT.
Sunshine
In May, the average sunshine is 9h.UV index
In May, the average daily maximum UV index in Vandalia is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What is the usual temperature for Vandalia in May?
What is the average humidity in May in Vandalia?
How many days does it rain in May in Vandalia?
When it does not snow in Vandalia?
Does it snow in Vandalia in May?
How many hours of daylight does Vandalia have in May?
What time are sunrise and sunset in May in Vandalia?
How long on average sun shines in May in Vandalia?
How high is the UV index in May in Vandalia?
Average temperature in May
Vandalia, IL
- Average high temperature in May: 73.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in May
Vandalia, 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
Vandalia, IL
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in May
Vandalia, IL
- Average humidity in May: 80%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Vandalia, IL
- Average rainfall in May: 4.09"
The wettest month (with the highest rainfall) is June (4.57").
The driest month (with the least rainfall) is February (2.01").
Average rainfall days in May
Vandalia, IL
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (9.2 days).
Average snowfall in May
Vandalia, IL
- Average snowfall in May: 0"
The month with the highest snowfall is December (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Vandalia, IL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.3 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
Vandalia, 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 30min).
- Average sunshine in May: 9h and 0min
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
Vandalia, IL
- Average sunshine days in May: 9.8 days
The month with the most sunshine days is October (17.2 days).
The month with the least sunshine days is July (8.6 days).
Average UV index in May
Vandalia, 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
Vandalia, IL
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July and September (Cloud cover 30).
Average visibility in May
Vandalia, 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).
Vandalia, Illinois, USA
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