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's arrival coincides with a rise in the average high-temperature, moving from April's cool 53.2°F (11.8°C) to an enjoyable 63.1°F (17.3°C). In Box Elder, May nights cool down to an average of 45.3°F (7.4°C).Humidity
In May, the average relative humidity is 64%.Rainfall
May is the month with the most rainfall. Rain falls for 17.1 days and accumulates 2.28" (58mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.3 snowfall days, in May, Box Elder aggregates 1.46" (37mm) of snow. In Box Elder, South Dakota, during the entire year, snow falls for 50.4 days and aggregates up to 24.41" (620mm) of snow.Daylight
In May, the average length of the day is 14h and 47min.On the first day of May, sunrise is at 5:42 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:28 pm MDT.
Sunshine
The average sunshine in May is 10.1h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 5 in May leads to these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the wettest month?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Box Elder have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Box Elder, SD
- Average high temperature in May: 63.1°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 (32.5°F).
- Average low temperature in May: 45.3°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).
Average pressure in May
Box Elder, 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
Box Elder, SD
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in May
Box Elder, SD
- Average humidity in May: 64%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).
Average rainfall in May
Box Elder, SD
- Average rainfall in May: 2.28"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Box Elder, SD
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).
Average snowfall in May
Box Elder, SD
- Average snowfall in May: 1.46"
The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Box Elder, SD
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Box Elder, SD
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in May
Box Elder, SD
- Average sunshine days in May: 11 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).
Average UV index in May
Box Elder, SD
- 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, November and December (UV index 2).
Average cloud cover in May
Box Elder, SD
- Average cloud cover in May: 34
The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Box Elder, SD
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Box Elder, South Dakota, USA
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