August weather forecast and climate
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 August

August, the last month of the summer, in Bismarck, is another warm month, with average temperature varying between 82.2°F (27.9°C) and 60.3°F (15.7°C).

Temperature

In Bismarck, the average high-temperature in August is almost the same as in July - a still moderately hot 82.2°F (27.9°C). In August, in Bismarck, North Dakota, the average low-temperature is 60.3°F (15.7°C).

Heat index

The average heat index is calculated to 83.8°F (28.8°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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, differences in body mass, height, and shape). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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

August is the least humid month, with an average relative humidity of 55%.

Rainfall

In August, the rain falls for 9.7 days. Throughout August, 1.38" (35mm) of precipitation is accumulated. Throughout the year, in Bismarck, there are 105.9 rainfall days, and 15" (381mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August is 14.1h.

Sunshine

In Bismarck, the average sunshine is 11h.

UV index

The average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in August in Bismarck?

In Bismarck, in August, the average high-temperature is 82.2°F (27.9°C), and the average low-temperature is 60.3°F (15.7°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, in August is evaluated at 83.8°F (28.8°C).

What is the least humid month in Bismarck?

August is the least humid month, with an average relative humidity of 55%.

What is the average humidity in August in Bismarck?

In August, the average relative humidity in Bismarck, North Dakota, is 55%.

How much does it rain in Bismarck in August?

In Bismarck, in August, it is raining for 9.7 days, with typically 1.38" (35mm) of accumulated precipitation.

When it does not snow in Bismarck?

In Bismarck snow does not fall in June through September.

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

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

How long on average sun shines in August in Bismarck?

The average sunshine in August in Bismarck, North Dakota, is 11h.

How high is the UV index in August in Bismarck?

In Bismarck, North Dakota, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in August
Bismarck, ND

Average temperature in August - Bismarck, ND
  • Average high temperature in August: 82.2°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 August: 60.3°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 August
Bismarck, ND

Average pressure in August - Bismarck, ND
  • Average pressure in August: 29.91"

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

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Average wind speed in August
Bismarck, ND

Average wind speed in August - Bismarck, ND
  • Average wind speed in August: 8.3mph

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 August
Bismarck, ND

Average humidity in August - Bismarck, ND
  • Average humidity in August: 55%

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 August
Bismarck, ND

Average rainfall in August - Bismarck, ND
  • Average rainfall in August: 1.38"

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 August
Bismarck, ND

Average rainfall days in August - Bismarck, ND
  • Average rainfall days in August: 9.7 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 August
Bismarck, ND

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

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

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Average snowfall days in August
Bismarck, ND

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 (15.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Bismarck, ND

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 the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in August: 11h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is January (Average sunshine: 3.8h).

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Average sunshine days in August
Bismarck, ND

Average sunshine days in August - Bismarck, ND
  • Average sunshine days in August: 18.8 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 August
Bismarck, ND

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in August
Bismarck, ND

Average cloud cover in August - Bismarck, ND
  • Average cloud cover in August: 21

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

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Average visibility in August
Bismarck, ND

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

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

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