Bismarck
North Dakota, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Bismarck, ND

An across the park view of the historical building of the State Capitol in Bismarck, North Dakota
An across the park view of the historical building of the State Capitol in Bismarck, North Dakota
May, the last month of the spring, in Bismarck, is an agreeable month, with average temperature ranging between min 42.6°F (5.9°C) and max 68.4°F (20.2°C).

Temperature

In May, the average high-temperature rises, from a moderate 57°F (13.9°C) in April, to an agreeable 68.4°F (20.2°C). In Bismarck, the average low-temperature is 42.6°F (5.9°C).

Humidity

With an average relative humidity of 60.1%, May is the least humid month in Bismarck.

Rainfall

In May, the rain falls for 10.1 days. Throughout May, 2.4" (61mm) of precipitation is accumulated. In Bismarck, during the entire year, the rain falls for 97.7 days and collects up to 17.9" (453.4mm) of precipitation.

Snowfall

Months with snowfall in Bismarck are January through May, September through December.

Daylight

In May, the average length of the day in Bismarck is 15.1h.

Sunshine

The average sunshine in May is 9.6h.

UV index

The average daily maximum UV index in Bismarck is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Bismarck?

In Bismarck, in May, the average high-temperature is 68.4°F (20.2°C), and the average low-temperature is 42.6°F (5.9°C).

What is the least humid month in Bismarck?

The least humid month in Bismarck, North Dakota, is May, with an average relative humidity of 60.1%.

What is the average humidity in May in Bismarck?

In May, the average relative humidity in Bismarck, North Dakota, is 60.1%.

How much does it rain in Bismarck in May?

In May, the rain falls for 10.1 days. Throughout May, 2.4" (61mm) of precipitation is accumulated.

What is the last month it snows in Bismarck?

May is the last month it regularly snows. During 0.4 snowfall days, in May, Bismarck aggregates 0.4" (10.2mm) of snow.

What is the average length of the day in May in Bismarck?

In May, the average length of the day in Bismarck is 15.1h.

How many hours of sunshine does Bismarck have in May?

The average sunshine in May in Bismarck is 9.6h.

What is the UV index reading in May in Bismarck?

In May, the average daily maximum UV index in Bismarck is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in May - Bismarck, ND
  • Average high temperature in May: 68.4°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in May: 42.7°F

The month with the highest average low temperature is July (57.4°F).
The coldest month (with the lowest average low temperature) is January (2.2°F).

Average humidity in May - Bismarck, ND
  • Average humidity in May: 60.1%

The month with the highest relative humidity is December (74.5%).
The month with the lowest relative humidity is May (60.1%).

Average rainfall in May - Bismarck, ND
  • Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is June (3.2").
The driest month (with the lowest rainfall) is January (0.4").

Average rainfall days in May - Bismarck, ND
  • Average rainfall days in May: 10.1 days

The month with the highest number of rainy days is June (11.2 days).
The month with the lowest number of rainy days is October (6.6 days).

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

The month with the highest snowfall is December (9.3").
Months with the lowest snowfall are June, July and August (0").

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 (10 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight in May / Average sunshine in May - Bismarck, ND
  • Average daylight in May: 15.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in May: 9.6h

The month with most sunshine is July (Average sunshine: 11.4h).
The month with least sunshine is December (Average sunshine: 4h).

Average UV index in May - Bismarck, ND
  • Average UV index in May: 6

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).