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 a temperature shift, with the average high-temperature escalating from a moderate 58.5°F (14.7°C) in April to an agreeable 69.3°F (20.7°C). Alleman observes an average low-temperature of 52.9°F (11.6°C) during May.Humidity
In May, the average relative humidity is 76%.Rainfall
May is the month with the most rainfall. Rain falls for 19 days and accumulates 4.65" (118mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Alleman aggregates 0.39" (10mm) of snow. Throughout the year, there are 44 snowfall days, and 16.65" (423mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 34min.On the first day of May in Alleman, sunrise is at 6:09 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:42 pm CDT.
Sunshine
In May, the average sunshine is 8.6h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
What is the rainiest month in Alleman?
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 Alleman have in May?
How high is the UV index in May?
Average temperature in May
Alleman, IA
- Average high temperature in May: 69.3°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in May: 52.9°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in May
Alleman, 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 (29.88"Hg).
Average wind speed in May
Alleman, IA
- Average wind speed in May: 9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Alleman, IA
- Average humidity in May: 76%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Alleman, IA
- Average rainfall in May: 4.65"
The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in May
Alleman, IA
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is June (19.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Alleman, IA
- Average snowfall in May: 0.39"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Alleman, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Alleman, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Alleman, IA
- Average sunshine days in May: 9.2 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (8.4 days).
Average UV index in May
Alleman, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in May
Alleman, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in May
Alleman, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Alleman, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location