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
Saint Mary's weather in May shows a rise in the average high-temperature, moving up from April's enjoyable 66.4°F (19.1°C) to a moderately hot 75.7°F (24.3°C). Saint Mary's temperature in May lowers to a consistent average of 57.9°F (14.4°C) during the nights.Humidity
With an average relative humidity of 79%, May is the most humid month.Rainfall
In Saint Mary, in May, during 17.3 rainfall days, 3.86" (98mm) of precipitation is typically accumulated. Throughout the year, in Saint Mary, there are 156.4 rainfall days, and 34.25" (870mm) of precipitation is accumulated.Snowfall
In Saint Mary, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 14min.On the first day of the month, sunrise is at 6:02 am and sunset at 7:50 pm. On the last day of May, sunrise is at 5:39 am and sunset at 8:16 pm CDT.
Sunshine
The average sunshine in May is 9.3h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Saint Mary. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 in May translates into these instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Saint Mary?
What is the most humid month in Saint Mary?
What is the average humidity in May in Saint Mary?
How many days does it rain in May in Saint Mary?
When it does not snow in Saint Mary?
Does it snow in Saint Mary in May?
What is the average length of the day in May in Saint Mary?
When are sunrise and sunset in May in Saint Mary?
How many hours of sunshine does Saint Mary have in May?
When is the highest UV index in Saint Mary?
What is the UV index reading in May in Saint Mary?
Average temperature in May
Saint Mary, MO
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in May: 57.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in May
Saint Mary, MO
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Saint Mary, MO
- Average wind speed in May: 7.4mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in May
Saint Mary, MO
- Average humidity in May: 79%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Saint Mary, MO
- Average rainfall in May: 3.86"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in May
Saint Mary, MO
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in May
Saint Mary, MO
- Average snowfall in May: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Saint Mary, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.2 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 Mary, 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 36min).
- Average sunshine in May: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Saint Mary, MO
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in May
Saint Mary, 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, February and December (UV index 2).
Average cloud cover in May
Saint Mary, MO
- Average cloud cover in May: 37
The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in May
Saint Mary, 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).
Saint Mary, Missouri, USA
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