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 arrival of May, the average high-temperature transitions from a moderate 59.9°F (15.5°C) in April to an agreeable 69.6°F (20.9°C). May witnesses an average low-temperature hovering around a cool 52.9°F (11.6°C).Humidity
The average relative humidity in May is 79%.Rainfall
The month with the most rainfall in Saint Marys, Iowa, is May, when the rain falls for 15.9 days and typically aggregates up to 3.07" (78mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Saint Marys, Iowa. During 0.1 snowfall days, in May, Saint Marys aggregates 0.04" (1mm) of snow. Throughout the year, in Saint Marys, there are 31.9 snowfall days, and 10.12" (257mm) of snow is accumulated.Daylight
The average length of the day in May in Saint Marys, Iowa, is 14h and 31min.On the first day of May in Saint Marys, Iowa, sunrise is at 6:11 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:41 pm CDT.
Sunshine
In Saint Marys, the average sunshine in May is 8.7h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 5 in May transforms into this advice:
Act with care - The suggestion to avoid sunburn is emphasized. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Saint Marys in May?
What is the average humidity in May in Saint Marys?
What is the rainiest month in Saint Marys?
How much does it rain in Saint Marys in May?
What is the last month it snows in Saint Marys?
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?
How high is the UV index in May in Saint Marys?
Average temperature in May
Saint Marys, IA
- Average high temperature in May: 69.6°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 52.9°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in May
Saint Marys, IA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Saint Marys, IA
- Average wind speed in May: 8.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in May
Saint Marys, IA
- Average humidity in May: 79%
The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Saint Marys, IA
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in May
Saint Marys, IA
- Average rainfall days in May: 15.9 days
The months with the highest number of rainy days are May and June (15.9 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in May
Saint Marys, IA
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Saint Marys, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (9.7 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, IA
- 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 18min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in May
Saint Marys, IA
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (11 days).
Average UV index in May
Saint Marys, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Saint Marys, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in May
Saint Marys, IA
- 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 Marys, Iowa, USA
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