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 onset of May brings a temperature shift, with the average high-temperature moving from a fresh 52.9°F (11.6°C) in April to a refreshing 63.5°F (17.5°C). Throughout the month of May, Nisland expects an average low of 44.6°F (7°C).Humidity
In May, the average relative humidity is 63%.Rainfall
May is the month with the most rainfall. Rain falls for 14.3 days and accumulates 2.05" (52mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.7 snowfall days, in May, Nisland aggregates 1.77" (45mm) of snow. Throughout the year, in Nisland, there are 52.1 snowfall days, and 23.54" (598mm) of snow is accumulated.Daylight
The average length of the day in May in Nisland is 14h and 50min.On the first day of May in Nisland, sunrise is at 5:42 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:32 pm MDT.
Sunshine
The average sunshine in May in Nisland, South Dakota, is 10.1h.UV index
In Nisland, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Experience reduced UV exposure by about half when donning a wide-brim hat. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What is the average May temperature in Nisland?
What is the average humidity in May in Nisland?
What is the rainiest month in Nisland?
How many days does it rain in May in Nisland?
What is the last month it snows in Nisland?
What is the average length of the day in May in Nisland?
What time are sunrise and sunset in May in Nisland?
How many hours of sunshine does Nisland have in May?
What is the UV index reading in May in Nisland?
Average temperature in May
Nisland, SD
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in May: 44.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is February (17.1°F).
Average pressure in May
Nisland, 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
Nisland, SD
- Average wind speed in May: 9.7mph
The windiest months (with the highest average wind speed) are January and October (10.4mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in May
Nisland, SD
- Average humidity in May: 63%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (47%).
Average rainfall in May
Nisland, SD
- Average rainfall in May: 2.05"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in May
Nisland, SD
- Average rainfall days in May: 14.3 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in May
Nisland, SD
- Average snowfall in May: 1.77"
The month with the highest snowfall is April (4.88").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Nisland, SD
- Average snowfall days in May: 1.7 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Nisland, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in May
Nisland, SD
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in May
Nisland, 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
Nisland, SD
- Average cloud cover in May: 33
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in May
Nisland, 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).
Nisland, South Dakota, USA
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