May weather forecast
Bismarck, ND

The historical building of the State Capitol in Bismarck, North Dakota
The historical building of the State Capitol in Bismarck, North Dakota

Weather in May

The last month of the spring, May, is an enjoyable month in Bismarck, North Dakota, with an average temperature ranging between min 46.4°F (8°C) and max 64.9°F (18.3°C).

Temperature

In Bismarck, the average high-temperature in May increases from a cool 51.8°F (11°C) in April to a comfortable 64.9°F (18.3°C). In May, in Bismarck, the average low-temperature is 46.4°F (8°C).

Humidity

In Bismarck, the average relative humidity in May is 63%.

Rainfall

In Bismarck, during 15.5 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Bismarck, during the entire year, the rain falls for 105.9 days and collects up to 15" (381mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Bismarck. May is the last month it regularly snows in Bismarck, North Dakota. During 0.4 snowfall days, Bismarck aggregates 0.2" (5mm) of snow. In Bismarck, North Dakota, during the entire year, snow falls for 73.7 days and aggregates up to 23.11" (587mm) of snow.

Daylight

In May, the average length of the day in Bismarck is 15h and 4min.
On the first day of May, sunrise is at 6:27 am and sunset at 8:53 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:28 pm CDT.

Sunshine

In May, the average sunshine is 9.5h.

UV index

In May, the average daily maximum UV index in Bismarck is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. 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 Bismarck?

In May, the average relative humidity in Bismarck, North Dakota, is 63%.

How many days does it rain in May in Bismarck?

In Bismarck, during May, the rain falls for 15.5 days and regularly aggregates up to 2.17" (55mm) of precipitation.

What is the last month it snows in Bismarck?

May is the last month it regularly snows in Bismarck. During 0.4 snowfall days, in May, Bismarck aggregates 0.2" (5mm) of snow.

How many hours of daylight does Bismarck have in May?

In Bismarck, the average day length in May is 15h and 4min.

What time are sunrise and sunset in May in Bismarck?

In May, on the first day of the month, sunrise is at 6:27 am and sunset at 8:53 pm. On the last day of the month, in Bismarck, North Dakota, sunrise is at 5:53 am and sunset at 9:28 pm CDT.

How long on average sun shines in May in Bismarck?

In May, the average sunshine duration in Bismarck, North Dakota, is 9.5h.

How high is the UV index in May in Bismarck?

In Bismarck, North Dakota, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Bismarck, ND

Average temperature in May - Bismarck, ND
  • Average high temperature in May: 64.9°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (20.8°F).

  • Average low temperature in May: 46.4°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).

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Average pressure in May
Bismarck, ND

Average pressure in May - Bismarck, ND
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in May
Bismarck, ND

Average wind speed in May - Bismarck, ND
  • Average wind speed in May: 10mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in May
Bismarck, ND

Average humidity in May - Bismarck, ND
  • Average humidity in May: 63%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in May
Bismarck, ND

Average rainfall in May - Bismarck, ND
  • Average rainfall in May: 2.17"

The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in May
Bismarck, ND

Average rainfall days in May - Bismarck, ND
  • Average rainfall days in May: 15.5 days

The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in May
Bismarck, ND

Average snowfall in May - Bismarck, ND
  • Average snowfall in May: 0.2"

The month with the highest snowfall is February (4.33").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Bismarck, ND

Average snowfall days in May - Bismarck, ND
  • Average snowfall days in May: 0.4 days

The month with the highest number of snowfall days is December (15.7 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
Bismarck, ND

Average daylight in May / Average sunshine in May - Bismarck, ND
  • Average daylight in May: 15h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 37min).

  • Average sunshine in May: 9h and 30min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in May
Bismarck, ND

Average sunshine days in May - Bismarck, ND
  • Average sunshine days in May: 12.8 days

The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is March (12.3 days).

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Average UV index in May
Bismarck, ND

Average UV index in May - Bismarck, ND
  • Average UV index in May: 5

The month with the highest UV index is 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
Bismarck, ND

Average cloud cover in May - Bismarck, ND
  • Average cloud cover in May: 38

The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 21).

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Average visibility in May
Bismarck, ND

Average visibility in May - Bismarck, ND
  • Average visibility in May: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

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