May weather forecast
Flandreau, SD

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Weather in May

As May arrives in Flandreau, strands of winter have effectively dissolved. Instead of snowflakes, precipitation mostly falls in the form of rain now. The atmosphere tends to be moderately humid. It brings forth a definitive rise in temperature. A noted feature of May is the prominent increase in sunlight hours, helping the city transition fully into the spring season.

Temperature

Flandreau in May experiences an increase in the average high-temperature, moving from April's fresh 53.6°F (12°C) to an enjoyable 66.4°F (19.1°C). May nights in Flandreau are marked by an average low-temperature of 48.7°F (9.3°C).

Humidity

In May, the average relative humidity is 70%.

Rainfall

In Flandreau, during May, the rain falls for 15 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Flandreau, during the entire year, the rain falls for 113.8 days and collects up to 20.59" (523mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Flandreau. During 0.5 snowfall days, in May, Flandreau aggregates 0.2" (5mm) of snow. Throughout the year, in Flandreau, there are 53.1 snowfall days, and 20.04" (509mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 47min.
On the first day of the month, sunrise is at 6:16 am and sunset at 8:30 pm. On the last day of May, in Flandreau, sunrise is at 5:46 am and sunset at 9:02 pm CDT.

Sunshine

In May, the average sunshine is 8.7h.

UV index

In May, the average daily maximum UV index in Flandreau, South Dakota, is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 5 during May morphs into the following directions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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Frequently asked questions

What is the usual temperature for Flandreau in May?

May temperatures vary between a high-temperature of 66.4°F (19.1°C) and a low-temperature of 48.7°F (9.3°C).

What is the average humidity in May in Flandreau?

In May, the average relative humidity is 70%.

How much does it rain in Flandreau in May?

In Flandreau, in May, it is raining for 15 days, with typically 2.68" (68mm) of accumulated precipitation.

What is the last month it snows in Flandreau?

May is the last month it regularly snows in Flandreau. During 0.5 snowfall days, in May, Flandreau aggregates 0.2" (5mm) of snow.

How many hours of daylight does Flandreau have in May?

In Flandreau, South Dakota, the average day length in May is 14h and 47min.

What time are sunrise and sunset in May in Flandreau?

In May, on the first day of the month, sunrise is at 6:16 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 9:02 pm CDT.

How long on average sun shines in May in Flandreau?

In Flandreau, South Dakota, the average sunshine duration in May is 8.7h.

How high is the UV index in May in Flandreau?

In Flandreau, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Flandreau, SD

Average temperature in May - Flandreau, SD
  • Average high temperature in May: 66.4°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 (21.6°F).

  • Average low temperature in May: 48.7°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).

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Average pressure in May
Flandreau, SD

Average pressure in May - Flandreau, SD
  • Average pressure in May: 29.92"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in May
Flandreau, SD

Average wind speed in May - Flandreau, SD
  • Average wind speed in May: 10.1mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).

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Average humidity in May
Flandreau, SD

Average humidity in May - Flandreau, SD
  • Average humidity in May: 70%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in May
Flandreau, SD

Average rainfall in May - Flandreau, SD
  • Average rainfall in May: 2.68"

The wettest month (with the highest rainfall) is June (3.15").
The driest months (with the least rainfall) are January and November (0.63").

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Average rainfall days in May
Flandreau, SD

Average rainfall days in May - Flandreau, SD
  • Average rainfall days in May: 15 days

The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is February (2.4 days).

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Average snowfall in May
Flandreau, SD

Average snowfall in May - Flandreau, SD
  • Average snowfall in May: 0.2"

The month with the highest snowfall is December (4.8").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Flandreau, SD

Average snowfall days in May - Flandreau, SD
  • Average snowfall days in May: 0.5 days

The month with the highest number of snowfall days is January (11.8 days).
The 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
Flandreau, SD

Average daylight in May / Average sunshine in May - Flandreau, SD
  • Average daylight in May: 14h and 5min

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 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in May
Flandreau, SD

Average sunshine days in May - Flandreau, SD
  • Average sunshine days in May: 14.3 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in May
Flandreau, SD

Average UV index in May - Flandreau, 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, November and December (UV index 1).

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Average cloud cover in May
Flandreau, SD

Average cloud cover in May - Flandreau, SD
  • Average cloud cover in May: 42

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in May
Flandreau, SD

Average visibility in May - Flandreau, 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).

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Flandreau, South Dakota, USA

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