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 beginning of May signals a rise in the average high-temperature, moving from a fresh 51.1°F (10.6°C) in April to a refreshing 64°F (17.8°C). During May, the average low-temperature is a frosty 46.6°F (8.1°C).Humidity
In May, the average relative humidity is 70%.Rainfall
In Wallace, in May, it is raining for 16.5 days, with typically 2.72" (69mm) of accumulated precipitation. Throughout the year, in Wallace, South Dakota, there are 112.9 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
Months with snowfall in Wallace are January through May, October through December. May is the last month it regularly snows in Wallace. During 0.8 snowfall days, in May, Wallace aggregates 0.12" (3mm) of snow. Throughout the year, in Wallace, there are 68.4 snowfall days, and 23.74" (603mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 53min.On the first day of May, sunrise is at 6:17 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 9:09 pm CDT.
Sunshine
The average sunshine in May in Wallace is 8.7h.UV index
The average daily maximum UV index in May in Wallace is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Stay sun-safe with clothing that is both closely woven and worn loosely. Take careful note! The UV radiation of the Sun 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 in Wallace?
What is the average humidity in May in Wallace?
How much does it rain in Wallace in May?
What is the last month it snows in Wallace?
What is the average length of the day in May in Wallace?
What time are sunrise and sunset in May in Wallace?
How long on average sun shines in May in Wallace?
What is the UV index reading in May in Wallace?
Average temperature in May
Wallace, SD
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in May: 46.6°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure in May
Wallace, SD
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Wallace, SD
- Average wind speed in May: 10.5mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity in May
Wallace, SD
- Average humidity in May: 70%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall in May
Wallace, SD
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in May
Wallace, SD
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in May
Wallace, SD
- Average snowfall in May: 0.12"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Wallace, SD
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Wallace, 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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in May
Wallace, SD
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in May
Wallace, SD
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in May
Wallace, SD
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in May
Wallace, SD
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Wallace, South Dakota, USA
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