May weather forecastAlta, IA
May
Weather in May
The last month of the spring, May, is an agreeable month in Alta, Iowa, with an average temperature fluctuating between 52.3°F (11.3°C) and 68.9°F (20.5°C).Temperature
May brings a rise in the average high-temperature, transitioning from April's moderate 57.2°F (14°C) to an agreeable 68.9°F (20.5°C). Alta observes an average nighttime temperature of 52.3°F (11.3°C) during May.Humidity
In May, the average relative humidity is 69%.Rainfall
In Alta, in May, during 18.7 rainfall days, 3.9" (99mm) of precipitation is typically accumulated. Throughout the year, there are 135.1 rainfall days, and 26.73" (679mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Alta aggregates 0.28" (7mm) of snow. Throughout the year, there are 50 snowfall days, and 20.04" (509mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 39min.On the first day of May, sunrise is at 6:14 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:52 pm CDT.
Sunshine
In May, the average sunshine is 8.7h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 5 in May translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Alta, IA
- Average high temperature in May: 68.9°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in May: 52.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in May
Alta, 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 (29.87"Hg).
Average wind speed in May
Alta, IA
- Average wind speed in May: 9.6mph
The windiest months (with the highest average wind speed) are January and April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in May
Alta, IA
- Average humidity in May: 69%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in May
Alta, IA
- Average rainfall in May: 3.9"
The wettest month (with the highest rainfall) is June (4.02").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in May
Alta, IA
- Average rainfall days in May: 18.7 days
The month with the highest number of rainy days is June (19 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in May
Alta, IA
- Average snowfall in May: 0.28"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Alta, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Alta, IA
- Average daylight in May: 14h and 36min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Alta, IA
- Average sunshine days in May: 9.8 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in May
Alta, 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 and February (UV index 1).
Average cloud cover in May
Alta, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in May
Alta, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
