May weather forecast
Herreid, SD

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Weather in May

May, the last month of the spring in Herreid, is a comfortable month, with an average temperature ranging between min 48.2°F (9°C) and max 66.6°F (19.2°C).

Temperature

Observing a rise in May, the average high-temperature goes from April's fresh 54.1°F (12.3°C) to a comfortable 66.6°F (19.2°C). Herreid's May nights cool down to an average low-temperature of 48.2°F (9°C).

Humidity

In May, the average relative humidity is 62%.

Rainfall

In Herreid, in May, during 13.2 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Herreid, during the entire year, the rain falls for 89.4 days and collects up to 15.39" (391mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Herreid. May is the last month it regularly snows in Herreid, South Dakota. During 0.3 snowfall days, in May, Herreid aggregates 0.12" (3mm) of snow. Throughout the year, in Herreid, South Dakota, there are 49.4 snowfall days, and 19.09" (485mm) of snow is accumulated.

Daylight

In Herreid, the average length of the day in May is 14h and 58min.
On the first day of the month, sunrise is at 6:26 am and sunset at 8:48 pm. On the last day of May, sunrise is at 5:53 am and sunset at 9:22 pm CDT.

Sunshine

The average sunshine in May is 9.3h.

UV index

In Herreid, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 5 during May translates into the following guidance:
Adopt protective measures - It is advised to guard against sun damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Frequently asked questions

What are the temperatures in Herreid in May?

May temperatures in Herreid vary between a high-temperature of 66.6°F (19.2°C) and a low-temperature of 48.2°F (9°C).

What is the average humidity in May in Herreid?

In May, the average relative humidity in Herreid is 62%.

How much does it rain in Herreid in May?

In May, the rain falls for 13.2 days. Throughout May, 2.28" (58mm) of precipitation is accumulated.

What is the last month it snows in Herreid?

May is the last month it regularly snows in Herreid, South Dakota. During 0.3 snowfall days, in May, Herreid aggregates 0.12" (3mm) of snow.

How many hours of daylight does Herreid have in May?

The average day length in May is 14h and 58min.

When is the sunrise / sunset in May in Herreid?

On the first day of May, sunrise is at 6:26 am and sunset at 8:48 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:22 pm CDT.

How long on average sun shines in May in Herreid?

In Herreid, the average sunshine duration in May is 9.3h.

What is the UV index intensity in May in Herreid?

In May, the average daily maximum UV index is 5. A UV Index 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
Herreid, SD

Average temperature in May - Herreid, SD
  • Average high temperature in May: 66.6°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).

  • Average low temperature in May: 48.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (9°F).

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Average pressure in May
Herreid, SD

Average pressure in May - Herreid, 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 (29.84"Hg).

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Average wind speed in May
Herreid, SD

Average wind speed in May - Herreid, SD
  • Average wind speed in May: 10.8mph

The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).

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Average humidity in May
Herreid, SD

Average humidity in May - Herreid, SD
  • Average humidity in May: 62%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).

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Average rainfall in May
Herreid, SD

Average rainfall in May - Herreid, SD
  • Average rainfall in May: 2.28"

The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in May
Herreid, SD

Average rainfall days in May - Herreid, SD
  • Average rainfall days in May: 13.2 days

The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).

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Average snowfall in May
Herreid, SD

Average snowfall in May - Herreid, SD
  • Average snowfall in May: 0.12"

The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Herreid, SD

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

Average daylight in May / Average sunshine in May - Herreid, SD
  • Average daylight in May: 15h and 0min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in May: 9h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in May
Herreid, SD

Average sunshine days in May - Herreid, SD
  • Average sunshine days in May: 15.5 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).

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Average UV index in May
Herreid, SD

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in May
Herreid, SD

Average cloud cover in May - Herreid, SD
  • Average cloud cover in May: 36

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).

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Average visibility in May
Herreid, SD

Average visibility in May - Herreid, 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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Herreid, South Dakota, USA

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