May weather forecastDeadwood, SD
May
Weather in May
May brings a breath of fresh air in Deadwood, offering warmer temperatures and bright sunshine. The days get longer, the trees start to blossom, and the city enjoys average high temperatures of around 60.4°F (15.8°C). However, the higher temperatures also bring a greater likelihood of rainfall. As spring progresses into early summer, residents and tourists can start enjoying outside activities. The weather is pleasant enough for hiking or picnicking, but it is advisable to keep an eye on the weather forecast for any unexpected rains.Temperature
The shift from April to May brings an increase in the average high-temperature, moving from a chilly 49.6°F (9.8°C) to a refreshing 60.4°F (15.8°C). Deadwood's temperature tends to fall to an average low of 42.4°F (5.8°C) during the nights of May.Humidity
In Deadwood, the average relative humidity in May is 67%.Rainfall
The month with the most rainfall in Deadwood is May, when the rain falls for 13.5 days and typically aggregates up to 1.93" (49mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Deadwood, in May, snow falls for 3.6 days, with typically accumulated 4.69" (119mm) of snow. In Deadwood, during the entire year, snow falls for 66.6 days and aggregates up to 34.53" (877mm) of snow.Daylight
In May, the average length of the day is 14h and 49min.On the first day of the month, sunrise is at 5:44 am and sunset at 7:59 pm. On the last day of May, in Deadwood, sunrise is at 5:13 am and sunset at 8:31 pm MDT.
Sunshine
In Deadwood, the average sunshine in May is 10.1h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 4 in May transforms into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Deadwood, SD
- Average high temperature in May: 60.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is December (29.7°F).
- Average low temperature in May: 42.4°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (15.4°F).
Average pressure in May
Deadwood, 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
Deadwood, SD
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).
Average humidity in May
Deadwood, SD
- Average humidity in May: 67%
The months with the highest relative humidity are January and February (79%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in May
Deadwood, SD
- Average rainfall in May: 1.93"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in May
Deadwood, SD
- Average rainfall days in May: 13.5 days
The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in May
Deadwood, SD
- Average snowfall in May: 4.69"
The month with the highest snowfall is April (6.54").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Deadwood, SD
- Average snowfall days in May: 3.6 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Deadwood, SD
- Average daylight in May: 14h and 48min
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 6min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in May
Deadwood, SD
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in May
Deadwood, SD
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Deadwood, SD
- Average cloud cover in May: 34
The months with the most cloud cover are February and April (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Deadwood, 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).
