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
As May sets, the average high-temperature shows an increase, moving up from a moderate 55.8°F (13.2°C) in April to an enjoyable 66.9°F (19.4°C). Throughout the month of May, Stanley witnesses an average temperature of 50.5°F (10.3°C).Humidity
In Stanley, the average relative humidity in May is 78%.Rainfall
In May, in Stanley, the rain falls for 18.7 days. Throughout May, 4.41" (112mm) of precipitation is accumulated. In Stanley, during the entire year, the rain falls for 135.7 days and collects up to 29.65" (753mm) of precipitation.Snowfall
Months with snowfall in Stanley are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Stanley aggregates 0.24" (6mm) of snow. In Stanley, during the entire year, snow falls for 42.1 days and aggregates up to 18.39" (467mm) of snow.Daylight
The average length of the day in May is 14h and 38min.On the first day of May, sunrise is at 6:00 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 5:32 am and sunset at 8:38 pm CDT.
Sunshine
The average sunshine in May is 8.4h.UV index
In Stanley, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during May leads to these advisories:
Act with care - Obligation to protect against skin and eye damage is highlighted. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Stanley?
What is the average humidity in May in Stanley?
How much does it rain in Stanley in May?
What is the last month it snows in Stanley?
What is the average length of the day in May in Stanley?
When is the sunrise / sunset in May in Stanley?
How long on average sun shines in May in Stanley?
What is the UV index intensity in May in Stanley?
Average temperature in May
Stanley, IA
- 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 (23.7°F).
- Average low temperature in May: 50.5°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in May
Stanley, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Stanley, IA
- Average wind speed in May: 9.4mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Stanley, IA
- Average humidity in May: 78%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (73%).
Average rainfall in May
Stanley, IA
- Average rainfall in May: 4.41"
The wettest month (with the highest rainfall) is June (5").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in May
Stanley, IA
- Average rainfall days in May: 18.7 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in May
Stanley, IA
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Stanley, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Stanley, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Stanley, IA
- Average sunshine days in May: 10.1 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in May
Stanley, IA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in May
Stanley, IA
- Average cloud cover in May: 44
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Stanley, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Stanley, Iowa, USA
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