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
May's arrival brings a temperature shift, moving from a refreshing 64°F (17.8°C) in April to a moderately hot 73.8°F (23.2°C). Saint Louis throughout May, experiences an average nighttime temperature of 54°F (12.2°C).Humidity
The average relative humidity in May in Saint Louis is 77%.Rainfall
The months with the most rainfall in Saint Louis are May and August, with an average 3.35" (85mm) of precipitation.Snowfall
In Saint Louis, snow does not fall in May through September.Daylight
In May, the average length of the day in Saint Louis is 14h and 19min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:04 pm. On the last day of May, in Saint Louis, Virginia, sunrise is at 5:47 am and sunset at 8:30 pm EDT.
Sunshine
In Saint Louis, the average sunshine in May is 8.9h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 6 during May translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What are the temperatures in Saint Louis in May?
What is the average humidity in May in Saint Louis?
What is the wettest month in Saint Louis?
How many days does it rain in May in Saint Louis?
When it does not snow in Saint Louis?
Does it snow in Saint Louis in May?
What is the average length of the day in May in Saint Louis?
What time are sunrise and sunset in May in Saint Louis?
How long on average sun shines in May in Saint Louis?
When is the highest UV index in Saint Louis?
What is the UV index reading in May in Saint Louis?
Average temperature in May
Saint Louis, VA
- Average high temperature in May: 73.8°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in May
Saint Louis, VA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Saint Louis, VA
- Average wind speed in May: 5.8mph
The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in May
Saint Louis, VA
- Average humidity in May: 77%
The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (73%).
Average rainfall in May
Saint Louis, VA
- Average rainfall in May: 3.35"
The wettest months (with the highest rainfall) are May and August (3.35").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in May
Saint Louis, VA
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in May
Saint Louis, VA
- Average snowfall in May: 0"
The month with the highest snowfall is January (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Saint Louis, VA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.8 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 Louis, VA
- 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).
Average sunshine days in May
Saint Louis, VA
- Average sunshine days in May: 11.1 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in May
Saint Louis, VA
- 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
Saint Louis, VA
- Average cloud cover in May: 44
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in May
Saint Louis, VA
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).
Saint Louis, Virginia, USA
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