Climate and monthly 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 January

January, the same as December, in Bismarck, North Dakota, is a freezing cold winter month, with an average temperature varying between 20.8°F (-6.2°C) and 6.1°F (-14.4°C). The coldest month is January, with an average high-temperature of 20.8°F (-6.2°C) and an average low-temperature of 6.1°F (-14.4°C). Weather in January »

Weather in February

February, the last month of the winter in Bismarck, is another freezing cold month, with an average temperature ranging between min 7.9°F (-13.4°C) and max 22.3°F (-5.4°C). In February, the average high-temperature is almost the same as in January - a still subzero cold 22.3°F (-5.4°C). Weather in February »

Weather in March

March, the first month of the spring in Bismarck, is a wintry month, with an average temperature fluctuating between 37.9°F (3.3°C) and 23.4°F (-4.8°C). In March, the average high-temperature significantly increases from a freezing cold 22.3°F (-5.4°C) in February to a cold 37.9°F (3.3°C). Weather in March »

Weather in April

April in Bismarck, North Dakota, is a fresh spring month, with an average temperature varying between 51.8°F (11°C) and 34.5°F (1.4°C). In April, the average high-temperature increases from a cold 37.9°F (3.3°C) in March to a cool 51.8°F (11°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Bismarck, North Dakota, with an average temperature varying between 64.9°F (18.3°C) and 46.4°F (8°C). In May, the average high-temperature increases from a cool 51.8°F (11°C) in April to an enjoyable 64.9°F (18.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Bismarck, North Dakota, with an average temperature fluctuating between 75.6°F (24.2°C) and 55.6°F (13.1°C). In Bismarck, the average high-temperature in June increases from an enjoyable 64.9°F (18.3°C) in May to a warm 75.6°F (24.2°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Bismarck, North Dakota, with an average temperature fluctuating between 83.7°F (28.7°C) and 61.3°F (16.3°C). With an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 61.3°F (16.3°C), July is the warmest month. The average heat index in July is calculated to be a hot 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Bismarck, is also a moderately hot month, with an average temperature varying between 60.3°F (15.7°C) and 82.2°F (27.9°C). In August, the average high-temperature is practically the same as in July - a still moderately hot 82.2°F (27.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Bismarck, North Dakota, with an average temperature fluctuating between 72°F (22.2°C) and 52°F (11.1°C). In Bismarck, the average high-temperature in September decreases from a moderately hot 82.2°F (27.9°C) in August to an agreeable 72°F (22.2°C). Weather in September »

Weather in October

October, like September, in Bismarck, North Dakota, is a cool autumn month, with an average temperature varying between 54°F (12.2°C) and 38.5°F (3.6°C). In Bismarck, the average high-temperature in October declines considerably from an agreeable 72°F (22.2°C) in September to a cool 54°F (12.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Bismarck, is also a wintry month, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 38.7°F (3.7°C). In Bismarck, North Dakota, the average high-temperature in November declines considerably from a fresh 54°F (12.2°C) in October to a wintry 38.7°F (3.7°C). Weather in November »

Weather in December

December, the first month of the winter in Bismarck, is also a subzero cold month, with an average temperature fluctuating between 11.3°F (-11.5°C) and 23.2°F (-4.9°C). In Bismarck, the average high-temperature in December declines considerably from a wintry 38.7°F (3.7°C) in November to a freezing cold 23.2°F (-4.9°C). Weather in December »
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FAQ

What is the coldest month in Bismarck?

January is the coldest month in Bismarck, with an average high-temperature of 20.8°F (-6.2°C) and an average low-temperature of 6.1°F (-14.4°C).

What is the most humid month in Bismarck?

The most humid month in Bismarck, North Dakota, is January, with an average relative humidity of 89%.

What is the driest month in Bismarck?

January is the month with the least rainfall. Rain falls for 4 days and accumulates 0.59" (15mm) of precipitation.

How many days does it rain in Bismarck?

In Bismarck, North Dakota, during the entire year, the rain falls for 105.9 days and collects up to 15" (381mm) of precipitation.

When does it snow in Bismarck?

January through May, October through December are months with snowfall.

How many days does it snow in Bismarck?

In Bismarck, during the entire year, snow falls for 73.7 days and aggregates up to 23.11" (587mm) of snow.

What is the month with the least sunshine in Bismarck?

January has the least sunshine of the year in Bismarck, North Dakota, with an average of 3.8h of sunshine.

What is the month with the lowest UV index in Bismarck?

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.

What is the snowiest month in Bismarck?

February is the month with the most snowfall. Snow falls for 15 days and accumulates 4.33" (110mm) of snow.

When is Daylight Saving Time (DST) in Bismarck?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Bismarck?

The month with the most rainfall in Bismarck is June, when the rain falls for 14.8 days and typically aggregates up to 2.28" (58mm) of precipitation.

When it does not snow in Bismarck?

June through September are months without snowfall.

When are the longest days in Bismarck?

June has the longest days of the year, with an average of 15h and 48min of daylight.

What is the warmest month in Bismarck?

The warmest month is July, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 61.3°F (16.3°C).

What month has the most sunshine in Bismarck?

The month with the most sunshine is July, with an average of 11.4h of sunshine.

What is the month with the highest UV index in Bismarck?

July is the month with the highest UV index, with an average maximum UV index of 6.

What is the least humid month in Bismarck?

With an average relative humidity of 55%, August is the least humid month in Bismarck.

What is the month with the shortest days in Bismarck?

The month with the shortest days in Bismarck, North Dakota, is December, with an average of 8h and 37min of daylight.

Average pressure
Bismarck, ND

Average pressure - Bismarck, ND

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
Bismarck, ND

Average wind speed - Bismarck, ND

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 rainfall
Bismarck, ND

Average rainfall - Bismarck, ND

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
Bismarck, ND

Average rainfall days - Bismarck, ND

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
Bismarck, ND

Average snowfall - Bismarck, ND

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
Bismarck, ND

Average snowfall days - Bismarck, ND

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 / Average sunshine
Bismarck, ND

Average daylight / Average sunshine - Bismarck, ND

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).

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
Bismarck, ND

Average sunshine days - Bismarck, ND

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 visibility
Bismarck, ND

Average visibility - Bismarck, ND

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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