May weather forecast and climate
Mount Vernon, MO

Weather in May

The last month of the spring, May, is a warm month in Mount Vernon, Missouri, with average temperature varying between 56.5°F (13.6°C) and 75.7°F (24.3°C).

Temperature

In May, the average high-temperature rises, from an enjoyable 66.7°F (19.3°C) in April, to a moderately hot 75.7°F (24.3°C). In Mount Vernon, the average low-temperature is 56.5°F (13.6°C).

Humidity

With an average relative humidity of 78%, May is the most humid month in Mount Vernon.

Rainfall

May is the month with the most rainfall in Mount Vernon, Missouri. Rain falls for 17.8 days and accumulates 5.31" (135mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Mount Vernon aggregates 0.31" (8mm) of snow. In Mount Vernon, during the entire year, snow falls for 17.9 days, and aggregates up to 6.93" (176mm) of snow.

Daylight

The average length of the day in Mount Vernon, Missouri, is 14.2h.

Sunshine

In Mount Vernon, the average sunshine in May is 9h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Mount Vernon. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in May interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the most humid month in Mount Vernon?

May is the most humid month in Mount Vernon, with an average relative humidity of 78%.

What is the average humidity in May in Mount Vernon?

In May, the average relative humidity in Mount Vernon is 78%.

What is the wettest month in Mount Vernon?

The month with the most rainfall in Mount Vernon, Missouri, is May when the rain falls for 17.8 days and typically aggregates up to 5.31" (135mm) of precipitation.

How much does it rain in Mount Vernon in May?

In Mount Vernon, during May, the rain falls for 17.8 days and regularly aggregates up to 5.31" (135mm) of precipitation.

What is the last month it snows in Mount Vernon?

May is the last month it regularly snows. During 0.3 snowfall days, in May, Mount Vernon aggregates 0.31" (8mm) of snow.

How many hours of daylight does Mount Vernon have in May?

In Mount Vernon, the average length of the day in May is 14.2h.

How many hours of sunshine does Mount Vernon have in May?

In Mount Vernon, the average sunshine in May is 9h.

What are the months with the highest UV index in Mount Vernon?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in May in Mount Vernon?

The average daily maximum UV index in May in Mount Vernon is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.

Average temperature in May
Mount Vernon, MO

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).

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Average pressure in May
Mount Vernon, MO

Average pressure in May - Mount Vernon, MO
  • Average pressure in May: 29.95"

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are April and June (29.93").

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Average wind speed in May
Mount Vernon, MO

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).

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Average humidity in May
Mount Vernon, MO

Average humidity in May - Mount Vernon, MO
  • Average humidity in May: 78%

The month with the highest relative humidity is May (78%).
Months with the lowest relative humidity are January, July, August and October (73%).

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Average rainfall in May
Mount Vernon, MO

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").

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Average rainfall days in May
Mount Vernon, MO

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).

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Average snowfall in May
Mount Vernon, MO

Average snowfall in May - Mount Vernon, MO
  • Average snowfall in May: 0.31"

The month with the highest snowfall is February (2.24").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in May
Mount Vernon, MO

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).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Mount Vernon, MO

Average daylight in May / Average sunshine in May - Mount Vernon, MO
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in May: 9h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is January (Average sunshine: 5.3h).

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Average sunshine days in May
Mount Vernon, MO

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).

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Average UV index in May
Mount Vernon, MO

Average UV index in May - Mount Vernon, MO
  • Average UV index in May: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in May
Mount Vernon, MO

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).

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Average visibility in May
Mount Vernon, MO

Average visibility in May - Mount Vernon, MO
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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