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
As White Rock transitions into May, a rise in the average high-temperature is observed, moving from a fresh 53.1°F (11.7°C) in April to an enjoyable 66.7°F (19.3°C). White Rock's temperature drops to an average low of 48.9°F (9.4°C) during the nights of May.Humidity
In May, the average relative humidity is 66%.Rainfall
In White Rock, in May, it is raining for 14.2 days, with typically 2.52" (64mm) of accumulated precipitation. In White Rock, during the entire year, the rain falls for 102 days and collects up to 19.17" (487mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, White Rock aggregates 0.04" (1mm) of snow. Throughout the year, there are 54.3 snowfall days, and 19.17" (487mm) of snow is accumulated.Daylight
The average length of the day in May in White Rock is 14h and 58min.On the first day of May in White Rock, sunrise is at 6:11 am and sunset at 8:34 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 9:08 pm CDT.
Sunshine
In May, the average sunshine in White Rock is 8.8h.UV index
In White Rock, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 5 in May translates into the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in White Rock?
What is the average humidity in May in White Rock?
How many days does it rain in May in White Rock?
What is the last month it snows in White Rock?
What is the average length of the day in May in White Rock?
When are sunrise and sunset in May in White Rock?
How long on average sun shines in May in White Rock?
How high is the UV index in May in White Rock?
Average temperature in May
White Rock, SD
- Average high temperature in May: 66.7°F
The warmest months (with the highest average high temperature) are July and August (81.3°F).
The month with the lowest average high temperature is January (18.7°F).
- Average low temperature in May: 48.9°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in May
White Rock, SD
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
White Rock, SD
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in May
White Rock, SD
- Average humidity in May: 66%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (65%).
Average rainfall in May
White Rock, SD
- Average rainfall in May: 2.52"
The wettest months (with the highest rainfall) are June and July (3.03").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in May
White Rock, SD
- Average rainfall days in May: 14.2 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2 days).
Average snowfall in May
White Rock, SD
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
White Rock, SD
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
White Rock, SD
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in May
White Rock, SD
- Average sunshine days in May: 14.4 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in May
White Rock, 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 and December (UV index 1).
Average cloud cover in May
White Rock, SD
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in May
White Rock, SD
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
White Rock, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location