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
May brings a rise in Allison's average high-temperature, moving from a moderate 56.3°F (13.5°C) in April to an agreeable 68.2°F (20.1°C). Allison observes an average low-temperature of 51.8°F (11°C) during May.Humidity
In May, the average relative humidity in Allison is 76%.Rainfall
In Allison, Iowa, in May, it is raining for 19 days, with typically 4.69" (119mm) of accumulated precipitation. In Allison, during the entire year, the rain falls for 148.3 days and collects up to 31.02" (788mm) of precipitation.Snowfall
Months with snowfall in Allison are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Allison aggregates 0.35" (9mm) of snow. Throughout the year, in Allison, there are 53.2 snowfall days, and 22.4" (569mm) of snow is accumulated.Daylight
The average length of the day in May in Allison is 14h and 39min.On the first day of May, sunrise is at 6:04 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:42 pm CDT.
Sunshine
In May, the average sunshine is 8.5h.UV index
The average daily maximum UV index in May in Allison is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during May leads to these instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Allison?
What is the average humidity in May in Allison?
How many days does it rain in May in Allison?
What is the last month it snows in Allison?
How many hours of daylight does Allison have in May?
What time are sunrise and sunset in May in Allison?
How many hours of sunshine does Allison have in May?
What is the UV index intensity in May in Allison?
Average temperature in May
Allison, IA
- Average high temperature in May: 68.2°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in May
Allison, IA
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Allison, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Allison, IA
- Average humidity in May: 76%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Allison, IA
- Average rainfall in May: 4.69"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in May
Allison, IA
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is June (20.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in May
Allison, IA
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Allison, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Allison, 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 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Allison, IA
- Average sunshine days in May: 9.5 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in May
Allison, IA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Allison, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in May
Allison, IA
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Allison, Iowa, USA
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