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
The arrival of May brings an increase in high-temperatures, moving from a fresh 54.7°F (12.6°C) in April to an enjoyable 66.7°F (19.3°C). An average nighttime temperature of 50.4°F (10.2°C) is recorded during May.Humidity
The average relative humidity in May is 79%.Rainfall
In May, the rain falls for 18.9 days. Throughout May, 3.94" (100mm) of precipitation is accumulated. Throughout the year, there are 140.2 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
Months with snowfall in Donnan are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Donnan aggregates 0.12" (3mm) of snow. In Donnan, Iowa, during the entire year, snow falls for 47.1 days and aggregates up to 19.96" (507mm) of snow.Daylight
In May, the average length of the day is 14h and 40min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:08 pm. On the last day of May, in Donnan, sunrise is at 5:31 am and sunset at 8:39 pm CDT.
Sunshine
The average sunshine in May in Donnan is 8.4h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Donnan?
What is the average humidity in May in Donnan?
How many days does it rain in May in Donnan?
What is the last month it snows in Donnan?
How many hours of daylight does Donnan have in May?
When is the sunrise / sunset in May in Donnan?
How many hours of sunshine does Donnan have in May?
What is the UV index intensity in May in Donnan?
Average temperature in May
Donnan, IA
- Average high temperature in May: 66.7°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in May: 50.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.9°F).
Average pressure in May
Donnan, 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
Donnan, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Donnan, IA
- Average humidity in May: 79%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (74%).
Average rainfall in May
Donnan, IA
- Average rainfall in May: 3.94"
The wettest month (with the highest rainfall) is June (4.45").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in May
Donnan, IA
- Average rainfall days in May: 18.9 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in May
Donnan, IA
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Donnan, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Donnan, 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 54min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in May
Donnan, IA
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (8.9 days).
Average UV index in May
Donnan, 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
Donnan, IA
- Average cloud cover in May: 43
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
Donnan, IA
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Donnan, Iowa, USA
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