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 April gives way to May, the average high-temperature displays an increase, moving from a cool 51.1°F (10.6°C) to a comfortable 64.6°F (18.1°C). In the month of May, Altoona records a consistent average low-temperature of 46.2°F (7.9°C).Humidity
In Altoona, the average relative humidity in May is 78%.Rainfall
In Altoona, during May, the rain falls for 16.8 days and regularly aggregates up to 3.46" (88mm) of precipitation. In Altoona, during the entire year, the rain falls for 128.5 days and collects up to 26.22" (666mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.7 snowfall days, in May, Altoona aggregates 0.43" (11mm) of snow. Throughout the year, there are 57.9 snowfall days, and 25.87" (657mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 51min.On the first day of the month, sunrise is at 5:54 am and sunset at 8:11 pm. On the last day of May, sunrise is at 5:23 am and sunset at 8:44 pm CDT.
Sunshine
In May, the average sunshine in Altoona is 8.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 5 suggests this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Altoona have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Altoona, WI
- Average high temperature in May: 64.6°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in May: 46.2°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in May
Altoona, WI
- Average pressure in May: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Altoona, WI
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in May
Altoona, WI
- Average humidity in May: 78%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Altoona, WI
- Average rainfall in May: 3.46"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in May
Altoona, WI
- Average rainfall days in May: 16.8 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in May
Altoona, WI
- Average snowfall in May: 0.43"
The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Altoona, WI
- Average snowfall days in May: 0.7 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Altoona, WI
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in May
Altoona, WI
- Average sunshine days in May: 11.6 days
The month with the most sunshine days is January (17.4 days).
The month with the least sunshine days is June (10 days).
Average UV index in May
Altoona, WI
- Average UV index in May: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Altoona, WI
- Average cloud cover in May: 45
The months with the most cloud cover are January, February and December (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Altoona, WI
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Altoona, Wisconsin, USA
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