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
With the onset of May, the average high-temperature slightly shifts from April's fresh 54.3°F (12.4°C) to a comfortable 66.9°F (19.4°C). An average low-temperature of 46.8°F (8.2°C) is common during the nights of May.Humidity
In May, the average relative humidity is 79%.Rainfall
In Saint Marys, during May, the rain falls for 15.7 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Saint Marys, during the entire year, the rain falls for 118.9 days and collects up to 13.31" (338mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Saint Marys. During 0.5 snowfall days, in May, Saint Marys aggregates 0.75" (19mm) of snow. Throughout the year, there are 52.7 snowfall days, and 16.14" (410mm) of snow is accumulated.Daylight
In Saint Marys, the average length of the day in May is 14h and 32min.On the first day of the month, sunrise is at 6:10 am and sunset at 8:12 pm. On the last day of May, sunrise is at 5:43 am and sunset at 8:41 pm EDT.
Sunshine
In Saint Marys, the average sunshine in May is 8h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Saint Marys. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 5 in May transforms into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. When the Sun is at its strongest around midday, find shade and limit exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Saint Marys in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Saint Marys have in May?
When is the highest UV index?
How high is the UV index in May?
Average temperature in May
Saint Marys, PA
- Average high temperature in May: 66.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 46.8°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in May
Saint Marys, PA
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Saint Marys, PA
- Average wind speed in May: 7mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Saint Marys, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are June and July (78%).
Average rainfall in May
Saint Marys, PA
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is April (1.5").
The driest months (with the least rainfall) are January and November (0.83").
Average rainfall days in May
Saint Marys, PA
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in May
Saint Marys, PA
- Average snowfall in May: 0.75"
The month with the highest snowfall is February (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Saint Marys, PA
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Saint Marys, PA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in May
Saint Marys, PA
- Average sunshine days in May: 13 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (13 days).
Average UV index in May
Saint Marys, PA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Saint Marys, PA
- Average cloud cover in May: 52
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in May
Saint Marys, PA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (5mi).
The months with the lowest visibility are August and September (4mi).
Saint Marys, Pennsylvania, USA
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