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 shift into May is marked by a rise in the average high-temperature, moving from April's cool 52.3°F (11.3°C) to a refreshing 63°F (17.2°C). During May, the temperature is averaged to a low of 44.6°F (7°C) at night.Humidity
In May, the average relative humidity is 65%.Rainfall
May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 2.52" (64mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 2.3 snowfall days, in May, Union Center aggregates 2.72" (69mm) of snow. In Union Center, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.Daylight
In May, the average length of the day is 14h and 50min.On the first day of May, sunrise is at 5:39 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 5:08 am and sunset at 8:28 pm MDT.
Sunshine
In May, the average sunshine is 10.1h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May in Union Center?
What is the rainiest month in Union Center?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Union Center have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Union Center have in May?
How high is the UV index in May?
Average temperature in May
Union Center, SD
- Average high temperature in May: 63°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in May: 44.6°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in May
Union Center, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Union Center, SD
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity in May
Union Center, SD
- Average humidity in May: 65%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (49%).
Average rainfall in May
Union Center, SD
- Average rainfall in May: 2.52"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in May
Union Center, SD
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is December (5.8 days).
Average snowfall in May
Union Center, SD
- Average snowfall in May: 2.72"
The month with the highest snowfall is April (8.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Union Center, SD
- Average snowfall days in May: 2.3 days
The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Union Center, SD
- 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: 10h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in May
Union Center, SD
- Average sunshine days in May: 9.4 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in May
Union Center, SD
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Union Center, SD
- Average cloud cover in May: 33
The months with the most cloud cover are February and April (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Union Center, SD
- 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).
Union Center, South Dakota, USA
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