May weather forecast
Sisseton, SD

Weather in May

The last month of the spring, May, is an enjoyable month in Sisseton, South Dakota, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 65.1°F (18.4°C).

Temperature

In Sisseton, the average high-temperature rises, from a cool 51.8°F (11°C) in April, to an enjoyable 65.1°F (18.4°C). The average low-temperature, in Sisseton, South Dakota, is 48°F (8.9°C).

Humidity

In Sisseton, South Dakota, the average relative humidity is 68%.

Rainfall

In Sisseton, South Dakota,, it is raining for 14.8 days, with typically 2.48" (63mm) of accumulated precipitation. In Sisseton, during the entire year, the rain falls for 107.9 days and collects up to 20.63" (524mm) of precipitation.

Snowfall

Months with snowfall in Sisseton are January through May, October through December. May is the last month it regularly snows in Sisseton. During 0.3 snowfall days, in May, Sisseton aggregates 0.08" (2mm) of snow. Throughout the year, there are 53.2 snowfall days, and 20.12" (511mm) of snow is accumulated.

Daylight

In Sisseton, the average length of the day in May is 15h.

Sunshine

The average sunshine in May is 8.8h.

UV index

In Sisseton, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Sisseton?

In May, the average relative humidity is 68%.

How many days does it rain in May in Sisseton?

In Sisseton, South Dakota, in May, it is raining for 14.8 days, with typically 2.48" (63mm) of accumulated precipitation.

What is the last month it snows in Sisseton?

May is the last month it regularly snows in Sisseton. During 0.3 snowfall days, in May, Sisseton aggregates 0.08" (2mm) of snow.

How many hours of daylight does Sisseton have in May?

In Sisseton, South Dakota, the average length of the day in May is 15h.

How many hours of sunshine does Sisseton have in May?

The average sunshine in May in Sisseton is 8.8h.

What is the UV index reading in May in Sisseton?

The average daily maximum UV index in May in Sisseton is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in May
Sisseton, SD

Average temperature in May - Sisseton, SD
  • Average high temperature in May: 65.1°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (19°F).

  • Average low temperature in May: 48°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

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Average pressure in May
Sisseton, SD

Average pressure in May - Sisseton, SD
  • Average pressure in May: 29.93"

The month with the highest atmospheric pressure is February (30.17").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in May
Sisseton, SD

Average wind speed in May - Sisseton, SD
  • Average wind speed in May: 9.9mph

The windiest months (with the highest average wind speed) are April and October (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).

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Average humidity in May
Sisseton, SD

Average humidity in May - Sisseton, SD
  • Average humidity in May: 68%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (65%).

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Average rainfall in May
Sisseton, SD

Average rainfall in May - Sisseton, SD
  • Average rainfall in May: 2.48"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in May
Sisseton, SD

Average rainfall days in May - Sisseton, SD
  • Average rainfall days in May: 14.8 days

The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is February (1.6 days).

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Average snowfall in May
Sisseton, SD

Average snowfall in May - Sisseton, SD
  • Average snowfall in May: 0.08"

The month with the highest snowfall is December (4.29").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Sisseton, SD

Average snowfall days in May - Sisseton, SD
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is December (11.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Sisseton, SD
  • Average daylight in May: 15h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in May: 8.8h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 3.7h).

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Average sunshine days in May
Sisseton, SD

Average sunshine days in May - Sisseton, SD
  • Average sunshine days in May: 13.8 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in May
Sisseton, SD

Average UV index in May - Sisseton, SD
  • Average UV index in May: 5

Months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in May
Sisseton, SD

Average cloud cover in May - Sisseton, SD
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 60).
Months with the least cloud cover are July and August (Cloud cover 25).

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Average visibility in May
Sisseton, SD

Average visibility in May - Sisseton, SD
  • Average visibility in May: 6mi

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).

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