May weather forecast
Deadwood, SD

The warm setting sun has its rays spread over the scenic landscape in the colorful town of Deadwood, South Dakota
The warm setting sun has its rays spread over the scenic landscape in the colorful town of Deadwood, South Dakota

Weather in May

The last month of the spring, May, is a moderate month in Deadwood, South Dakota, with temperature in the range of an average high of 60.4°F (15.8°C) and an average low of 42.4°F (5.8°C).

Temperature

In Deadwood, the average high-temperature in May increases, from a frosty 49.6°F (9.8°C) in April, to a mild 60.4°F (15.8°C). In Deadwood, the average low-temperature is 42.4°F (5.8°C).

Humidity

In May, the average relative humidity is 67%.

Rainfall

The month with the most rainfall in Deadwood, South Dakota, 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, during 3.6 snowfall days, 4.69" (119mm) of snow is typically accumulated. In Deadwood, during the entire year, snow falls for 66.6 days, and aggregates up to 34.53" (877mm) of snow.

Daylight

The average length of the day is 14.8h.

Sunshine

In Deadwood, South Dakota, the average sunshine in May is 10.1h.

UV index

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in May in Deadwood?

The average relative humidity in May in Deadwood is 67%.

What is the wettest month in Deadwood?

May is the month with the most rainfall. Rain falls for 13.5 days and accumulates 1.93" (49mm) of precipitation.

How much does it rain in Deadwood in May?

In Deadwood, South Dakota, during May, the rain falls for 13.5 days and regularly aggregates up to 1.93" (49mm) of precipitation.

How much does it snow in Deadwood in May?

In Deadwood, South Dakota, in May, during 3.6 snowfall days, 4.69" (119mm) of snow is typically accumulated.

How many hours of daylight does Deadwood have in May?

In Deadwood, South Dakota, the average length of the day in May is 14.8h.

How long on average sun shines in May in Deadwood?

In Deadwood, South Dakota, the average sunshine in May is 10.1h.

What is the UV index intensity in May in Deadwood?

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV rays.

Average temperature in May
Deadwood, SD

Average temperature in May - Deadwood, SD
  • Average high temperature in May: 15.8°C

The warmest month (with the highest average high temperature) is July (27.7°C).
The month with the lowest average high temperature is December (-1.3°C).

  • Average low temperature in May: 5.8°C

The month with the highest average low temperature is July (15.8°C).
The coldest month (with the lowest average low temperature) is February (-9.2°C).

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Average pressure in May
Deadwood, SD

Average pressure in May - Deadwood, SD
  • Average pressure in May: 1012.8mbar

The month with the highest atmospheric pressure is January (1020.5mbar).
The month with the lowest atmospheric pressure is June (1010.6mbar).

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Average wind speed in May
Deadwood, SD

Average wind speed in May - Deadwood, SD
  • Average wind speed in May: 14.6km/h

The windiest month (with the highest average wind speed) is October (16km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).

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Average humidity in May
Deadwood, SD

Average humidity in May - Deadwood, SD
  • Average humidity in May: 67%

Months with the highest relative humidity are January and February (79%).
Months with the lowest relative humidity are August and September (51%).

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Average rainfall in May
Deadwood, SD

Average rainfall in May - Deadwood, SD
  • Average rainfall in May: 49mm

The wettest month (with the highest rainfall) is May (49mm).
The driest month (with the least rainfall) is January (14mm).

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Average rainfall days in May
Deadwood, SD

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).

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Average snowfall in May
Deadwood, SD

Average snowfall in May - Deadwood, SD
  • Average snowfall in May: 119mm

The month with the highest snowfall is April (166mm).
Months with the least snowfall are July and August (0mm).

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Average snowfall days in May
Deadwood, SD

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).
Months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
Deadwood, SD

Average daylight in May / Average sunshine in May - Deadwood, SD
  • Average daylight in May: 14.8h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in May: 10.1h

The month with the most sunshine is August (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 5.9h).

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Average sunshine days in May
Deadwood, SD

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).

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Average UV index in May
Deadwood, SD

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).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in May
Deadwood, SD

Average cloud cover in May - Deadwood, SD
  • Average cloud cover in May: 34

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).

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Average visibility in May
Deadwood, SD

Average visibility in May - Deadwood, SD
  • Average visibility in May: 9km

Months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is January (8km).

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