May weather forecastHarrisburg, SD
May
Weather in May
May officially ushers in Spring in its full glory. Warmer temperatures, ample sunshine and considerable rainfall characterize this vibrant month in Harrisburg. Witness the onset of the true rainy season with a total rainfall of 3.07" (78mm) spanning approximately 16.6 days; this vital fact is an indication towards the quintessence of the season. New foliage across the city adds a vibrancy to the cityscape.Temperature
Harrisburg's transition into May is marked by a temperature shift, moving from a refreshing 56.7°F (13.7°C) in April to an agreeable 68.5°F (20.3°C). During the nights in May, Harrisburg observes an average low-temperature of 50.7°F (10.4°C).Humidity
In May, the average relative humidity is 69%.Rainfall
In May, the rain falls for 16.6 days. Throughout May, 3.07" (78mm) of precipitation is accumulated. In Harrisburg, during the entire year, the rain falls for 119.2 days and collects up to 21.73" (552mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Harrisburg aggregates 0.24" (6mm) of snow. In Harrisburg, during the entire year, snow falls for 40.5 days and aggregates up to 16.77" (426mm) of snow.Daylight
In Harrisburg, the average length of the day in May is 14h and 43min.On the first day of May, sunrise is at 6:18 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 9:00 pm CDT.
Sunshine
The average sunshine in May is 8.8h.UV index
In Harrisburg, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Harrisburg, SD
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in May
Harrisburg, SD
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Harrisburg, SD
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in May
Harrisburg, SD
- Average humidity in May: 69%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (66%).
Average rainfall in May
Harrisburg, SD
- Average rainfall in May: 3.07"
The wettest month (with the highest rainfall) is June (3.35").
The driest months (with the least rainfall) are January, February and November (0.67").
Average rainfall days in May
Harrisburg, SD
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in May
Harrisburg, SD
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Harrisburg, SD
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is December (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Harrisburg, SD
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Harrisburg, SD
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in May
Harrisburg, 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
Harrisburg, SD
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in May
Harrisburg, 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).
