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
Selby in May shows a temperature shift, moving from an average high of a cool 54.1°F (12.3°C) in April to a comfortable 66.6°F (19.2°C). May witnesses an average nighttime temperature of 48.2°F (9°C).Humidity
In Selby, the average relative humidity in May is 62%.Rainfall
In Selby, South Dakota, during May, the rain falls for 13.2 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Selby, during the entire year, the rain falls for 89.4 days and collects up to 15.39" (391mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Selby. May is the last month it regularly snows. During 0.3 snowfall days, in May, Selby aggregates 0.12" (3mm) of snow. Throughout the year, in Selby, there are 49.4 snowfall days, and 19.09" (485mm) of snow is accumulated.Daylight
The average length of the day in May in Selby, South Dakota, is 14h and 56min.On the first day of the month, sunrise is at 6:26 am and sunset at 8:47 pm. On the last day of May, sunrise is at 5:54 am and sunset at 9:21 pm CDT.
Sunshine
In May, the average sunshine is 9.3h.UV index
In Selby, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in May transforms into the following instructions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Selby?
What is the average humidity in May in Selby?
How many days does it rain in May in Selby?
What is the last month it snows in Selby?
How many hours of daylight does Selby have in May?
When are sunrise and sunset in May in Selby?
How many hours of sunshine does Selby have in May?
How high is the UV index in May in Selby?
Average temperature in May
Selby, SD
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in May: 48.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in May
Selby, SD
- Average pressure in May: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Selby, SD
- Average wind speed in May: 10.8mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).
Average humidity in May
Selby, SD
- Average humidity in May: 62%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).
Average rainfall in May
Selby, SD
- Average rainfall in May: 2.28"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in May
Selby, SD
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in May
Selby, SD
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Selby, SD
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Selby, SD
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Selby, SD
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).
Average UV index in May
Selby, 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 and December (UV index 1).
Average cloud cover in May
Selby, SD
- Average cloud cover in May: 36
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in May
Selby, 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).
Selby, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location