May weather forecast
Sisseton, SD

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Weather in May

In Sisseton, May welcomes further warmth with high temperatures soaring to 65.1°F (18.4°C) and low temperatures hovering around 48°F (8.9°C). This significant increase allows for a broad range of outdoor activities as citizens joyfully greet sunny and warm weather. However, May also introduces the highest levels of rainfall throughout the year, leading to a mix of sunlit and rainy days. Despite the increase in rainfall, the increased sunshine offers enough time to enjoy the outdoors.

Temperature

May's arrival in Sisseton brings a temperature shift, moving from a fresh 51.8°F (11°C) in April to a refreshing 65.1°F (18.4°C). During the month of May, Sisseton experiences a steady low-temperature average of 48°F (8.9°C).

Humidity

In May, the average relative humidity is 68%.

Rainfall

In Sisseton, during May, the rain falls for 14.8 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Sisseton, during the entire year, the rain falls for 107.9 days and collects up to 20.63" (524mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. 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, in Sisseton, 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 14h and 56min.
On the first day of May in Sisseton, sunrise is at 6:14 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 9:09 pm CDT.

Sunshine

In Sisseton, the average sunshine in May is 8.8h.

UV index

The average daily maximum UV index in May in Sisseton is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In May, the UV index of 5 transforms into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Sisseton in May?

Sisseton in May has an average high-temperature of 65.1°F (18.4°C) and an average low-temperature of 48°F (8.9°C).

What is the average humidity in May in Sisseton?

In Sisseton, the average relative humidity in May is 68%.

How many days does it rain in May in Sisseton?

In May, in Sisseton, the rain falls for 14.8 days. Throughout May, 2.48" (63mm) of precipitation is accumulated.

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?

The average day length in May in Sisseton, South Dakota, is 14h and 56min.

When are sunrise and sunset in May in Sisseton?

In May, on the first day of the month, sunrise is at 6:14 am and sunset at 8:35 pm. On the last day of the month, in Sisseton, sunrise is at 5:42 am and sunset at 9:09 pm CDT.

How long on average sun shines in May in Sisseton?

In May, the average sunshine duration in Sisseton is 8.8h.

What is the UV index intensity in May in Sisseton?

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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).

Average pressure in May
Sisseton, SD

Average pressure in May - Sisseton, 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 (29.86"Hg).

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).

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%).

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").

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).

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").
The months with the least snowfall are June, July, August and September (0").

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).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Sisseton, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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).

Average UV index in May
Sisseton, SD

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

The 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).

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).
The months with the least cloud cover are July and August (Cloud cover 25).

Average visibility in May
Sisseton, SD

Average visibility in May - Sisseton, 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).

Sisseton, South Dakota, USA

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