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
Noticing a change, the average high-temperature during May moves from April's refreshing 66.7°F (19.3°C) to a warm 75.7°F (24.3°C). Mount Vernon experiences a nighttime temperature average of 56.5°F (13.6°C) during May.Humidity
May is the most humid month, with an average relative humidity of 78%.Rainfall
May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 5.31" (135mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Mount Vernon aggregates 0.31" (8mm) of snow. Throughout the year, there are 17.9 snowfall days, and 6.93" (176mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 10min.On the first day of the month, sunrise is at 6:19 am and sunset at 8:04 pm. On the last day of May, sunrise is at 5:56 am and sunset at 8:29 pm CDT.
Sunshine
In Mount Vernon, the average sunshine in May is 9h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 6 in May leads to these guidelines:
Resist overexposure. Safeguarding from solar damage is indispensable. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the most humid month?
What is the average humidity in May?
What is the rainiest month?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
When is the highest UV index?
What is the UV index intensity in May?
Average temperature in May
Mount Vernon, MO
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in May: 56.5°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in May
Mount Vernon, MO
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).
Average wind speed in May
Mount Vernon, MO
- Average wind speed in May: 8.6mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in May
Mount Vernon, MO
- Average humidity in May: 78%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).
Average rainfall in May
Mount Vernon, MO
- Average rainfall in May: 5.31"
The wettest month (with the highest rainfall) is May (5.31").
The driest month (with the least rainfall) is February (1.69").
Average rainfall days in May
Mount Vernon, MO
- Average rainfall days in May: 17.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in May
Mount Vernon, MO
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Mount Vernon, MO
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Mount Vernon, MO
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in May
Mount Vernon, MO
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in May
Mount Vernon, MO
- 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 and December (UV index 2).
Average cloud cover in May
Mount Vernon, MO
- Average cloud cover in May: 38
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in May
Mount Vernon, MO
- 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).
Mount Vernon, Missouri, USA
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