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

August 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
August, the last month of the summer, in Bismarck, is another warm month, with average temperature ranging between min 55.6°F (13.1°C) and max 83.5°F (28.6°C).

Temperature

In Bismarck, the average high-temperature is almost the same as in July - a still moderately hot 83.5°F (28.6°C). In Bismarck, the average low-temperature is 55.6°F (13.1°C).

Heat index

In August, the average heat index is appraised at a hot 86.9°F (30.5°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, differences in body mass, height, and shape, pregnancy). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity in Bismarck, North Dakota, is 60.6%.

Rainfall

In Bismarck, in August, during 8.2 rainfall days, 2.3" (57.9mm) of precipitation is typically accumulated. In Bismarck, North Dakota, during the entire year, the rain falls for 97.7 days and collects up to 17.9" (453.4mm) of precipitation.

Snowfall

June through August are months without snowfall in Bismarck.

Daylight

In August, the average length of the day is 14.1h.

Sunshine

The average sunshine in August is 10.2h.

UV index

The average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 7 in August interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. 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.

What is the temperature in August in Bismarck?

In August, in Bismarck, North Dakota, the average high-temperature is 83.5°F (28.6°C), and the average low-temperature is 55.6°F (13.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines air temperature and relative humidity, in August is evaluated at 86.9°F (30.5°C).

What is the average humidity in August in Bismarck?

In Bismarck, North Dakota, the average relative humidity in August is 60.6%.

How many days does it rain in August in Bismarck?

In Bismarck, in August, during 8.2 rainfall days, 2.3" (57.9mm) of precipitation is typically accumulated.

Does it snow in Bismarck in August?

In Bismarck, in August, it doesn't snow. In September, it regularly snows.

When it does not snow in Bismarck?

In Bismarck, North Dakota, snow does not fall in June through August.

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

In Bismarck, the average length of the day in August is 14.1h.

How long on average sun shines in August in Bismarck?

In August, the average sunshine is 10.2h.

How high is the UV index in August in Bismarck?

In August, the average daily maximum UV index in Bismarck, North Dakota, is 7. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Bismarck, ND
  • Average high temperature in August: 83.5°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 August: 55.5°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 August - Bismarck, ND
  • Average humidity in August: 60.6%

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 August - Bismarck, ND
  • Average rainfall in August: 2.3"

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 August - Bismarck, ND
  • Average rainfall days in August: 8.2 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 August - Bismarck, ND
  • Average snowfall in August: 0"

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 August - Bismarck, ND
  • Average snowfall days in August: 0 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 August / Average sunshine in August - Bismarck, ND
  • Average daylight in August: 14.1h

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 August: 10.2h

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 August - Bismarck, ND
  • Average UV index in August: 7

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).