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 onset brings a rise in the average high-temperature, moving from an enjoyable 63.5°F (17.5°C) in April to a warm 74.1°F (23.4°C). In Saint Marys, the May nights cool down to an average low of 53.4°F (11.9°C).Humidity
In Saint Marys, West Virginia, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall in Saint Marys is May, when the rain falls for 20 days and typically aggregates up to 3.82" (97mm) of precipitation.Snowfall
In Saint Marys, West Virginia, snow does not fall in May through September.Daylight
In Saint Marys, West Virginia, the average length of the day in May is 14h and 22min.On the first day of May, sunrise is at 6:24 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 8:45 pm EDT.
Sunshine
In Saint Marys, the average sunshine in May is 8.7h.UV index
In Saint Marys, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Saint Marys?
What is the average humidity in May in Saint Marys?
What is the wettest month in Saint Marys?
How much does it rain in Saint Marys in May?
When it does not snow in Saint Marys?
Does it snow in Saint Marys in May?
How many hours of daylight does Saint Marys have in May?
When are sunrise and sunset in May in Saint Marys?
How long on average sun shines in May in Saint Marys?
What is the UV index intensity in May in Saint Marys?
Average temperature in May
Saint Marys, WV
- Average high temperature in May: 74.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in May: 53.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in May
Saint Marys, WV
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in May
Saint Marys, WV
- Average wind speed in May: 5.5mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in May
Saint Marys, WV
- Average humidity in May: 79%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in May
Saint Marys, WV
- Average rainfall in May: 3.82"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in May
Saint Marys, WV
- Average rainfall days in May: 20 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in May
Saint Marys, WV
- Average snowfall in May: 0"
The month with the highest snowfall is February (4.84").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Saint Marys, WV
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (14 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 Marys, WV
- 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 24min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in May
Saint Marys, WV
- Average sunshine days in May: 8.5 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (8.5 days).
Average UV index in May
Saint Marys, WV
- 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 Marys, WV
- Average cloud cover in May: 46
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Saint Marys, WV
- Average visibility in May: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
Saint Marys, West Virginia, USA
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