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

Temperature

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

Heat index

The average heat index in August is estimated at 83.8°F (28.8°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise 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', 'felt air temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like pregnancy, differences in body mass, height, and shape, wind, and activity influence one's weather impression. 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

In Bismarck, North Dakota, in August, it is raining for 9.7 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, there are 105.9 rainfall days, and 15" (381mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Bismarck.

Daylight

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

Sunshine

In August, the average sunshine is 11h.

UV index

The average daily maximum UV index in Bismarck, North Dakota, is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Bismarck?

The average high-temperature, in August, in Bismarck, North Dakota, is 82.2°F (27.9°C), while the average low-temperature is 60.3°F (15.7°C). The average heat index (a.k.a. 'real feel', 'feels like'), that combines both air temperature and relative humidity, 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 in Bismarck, with an average relative humidity of 55%.

What is the average humidity in August in Bismarck?

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

How much does it rain in Bismarck in August?

In Bismarck, North Dakota, 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.

How many hours of daylight does Bismarck have in August?

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 is 11h.

How high is the UV index in August in Bismarck?

In Bismarck, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in August - Bismarck, ND
  • Average high temperature in August: 27.9°C

The warmest month (with the highest average high temperature) is July (28.7°C).
The month with the lowest average high temperature is January (-6.2°C).

  • Average low temperature in August: 15.7°C

The month with the highest average low temperature is July (16.3°C).
The coldest month (with the lowest average low temperature) is January (-14.4°C).

Average pressure in August - Bismarck, ND
  • Average pressure in August: 1012.7mbar

The month with the highest atmospheric pressure is February (1021.7mbar).
The month with the lowest atmospheric pressure is June (1010.7mbar).

Average wind speed in August - Bismarck, ND
  • Average wind speed in August: 13.4km/h

The windiest month (with the highest average wind speed) is April (17.2km/h).
The calmest month (with the lowest average wind speed) is August (13.4km/h).

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%).

Average rainfall in August - Bismarck, ND
  • Average rainfall in August: 35mm

The wettest month (with the highest rainfall) is June (58mm).
The driest month (with the least rainfall) is January (15mm).

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).

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

The month with the highest snowfall is February (110mm).
Months with the least snowfall are June, July, August and September (0mm).

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).

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).

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).

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).

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).

Average visibility in August - Bismarck, ND
  • Average visibility in August: 10km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March and December (8km).