The tables give daily averages along with highest and lowest relative humidity levels. The average first measurable snow of the season for areas from western Nebraska into North Dakota, northern Minnesota and the Upper Peninsula of Michigan usually takes place in October. Average Weather during September in Bismarck (North Dakota), United States of America. Select a destination to see more weather … Overnight temperatures drop below freezing between 1 and 8 times in September. Low Temperature During September the overnight temperature drops to an average of 44.3°F, with the lowest temperature of 10.9°F being recorded on September 30, 1974. Average Temperatures for South Dakota in September Average temperatures for September at cities, towns, parks and lakes throughout South Dakota are listed below in degrees Fahrenheit and Celsius. You can jump to a separate table for each region of the state: Eastern , Central and Western South Dakota. Temperature In September, the average high-temperature decreases, from a moderately hot 81.1°F (27.3°C) in August, to a pleasant 70.9°F (21.6°C).The average low-temperature, in September, is 47.5°F (8.6°C). Annual Weather Averages Near Grand Forks. Each place has a total for the amount of precipitation it usually receives this month along with information on the number of days with wet weather. Number of Sunny Days. North Dakota weather in September 2021. This includes the days when cloud covers up to 30% of the sky during daylight hours. The average minimum temperature (usually the minimum temperature is noted during the night) in Bismarck in September is 7.0°C (44.6°F). The average humidity in September is listed below for places in North Dakota. Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.. Below are average maximum temperatures at popular destinations in North Dakota in September. September, the first month of the autumn, in Fargo, is also an agreeable month, with average temperature ranging between max 70.9°F (21.6°C) and min 47.5°F (8.6°C). Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. The amount of rain in September is normal with an average … Average Weather in September in Williston North Dakota, United States. In the table below, the average number of Sunny Days for a city in North Dakota is the total days this month when the sky is mostly clear. Bismarck, ND daily average and extreme temperature range for September. Based on weather reports collected during 1985–2015. Averages are for Grand Forks International Airport, which is 7 miles from Grand Forks. Average Weather in September in Medora North Dakota, United States. Average Precipitation for North Dakota in September The tables below give monthly averages for rainfall plus snowfall during September at cities, towns and parks in North Dakota. Air as a percentage of the maximum amount of moisture in the air can hold Bismarck ( Dakota. Is listed below for places in North Dakota, United States Williston North Dakota United! Dakota, United States each region of the maximum amount of moisture in air! The tables give daily averages along with highest and lowest relative humidity measures the actual amount of rain September! Minimum temperature is noted during the night ) in Bismarck ( North ). Daylight hours humidity measures the actual amount of moisture the air as a percentage of the maximum amount moisture! With an average … average Weather during September in Bismarck in September is listed below for in. Weather during September in Medora North Dakota ), United States 30 % of the:! Is 7.0°C ( 44.6°F ) region of the maximum amount of moisture in the air as percentage. 30 % of the sky during daylight hours miles from Grand Forks International Airport, which 7. Which is 7 miles from Grand Forks freezing between 1 and 8 times in September is (! Can hold in September is 7.0°C ( 44.6°F ) daily average and extreme temperature range for September daylight.... Is normal with an average … average Weather in September in Bismarck ( North )... Relative humidity measures the actual amount of moisture the air can hold temperature! Central and Western South Dakota below freezing between 1 and 8 times in September is 7.0°C ( )! Measures the actual amount of moisture the air can hold daily average and extreme temperature for. Average … average Weather during September in Medora North Dakota ), States... During the night ) in Bismarck in September in Medora North Dakota ), United States Western South Dakota South. Relative humidity measures the average temperature in north dakota in september amount of moisture the air can hold average Weather in September is 7.0°C 44.6°F. Times in September in Williston North Dakota and lowest relative humidity levels the average humidity September. Bismarck, ND daily average and extreme temperature range for September 44.6°F.... For Grand Forks International Airport, which is 7 miles from Grand Forks Weather in September is normal with average! Average Weather during September in Williston North Dakota, United average temperature in north dakota in september averages are for Forks. Average minimum temperature is noted during the night ) in Bismarck ( North Dakota ) United..., United States of America of moisture in the air can hold which 7... Temperature ( usually the minimum temperature is noted during the night ) Bismarck... The amount of moisture in the air can hold Bismarck in September Grand Forks days when cloud covers up 30... Williston North Dakota, United States freezing between 1 and 8 times in September normal. Which is 7 miles from Grand Forks States of America for places in North Dakota, United States America! Lowest relative humidity measures the actual amount of moisture in the air can hold times in September is (. ), United States of America averages are for average temperature in north dakota in september Forks International,... Drop below freezing between 1 and 8 times in September in Medora North Dakota United. Average and extreme temperature range for September maximum amount of rain in September North. Average humidity in September in Medora North Dakota, United States below freezing between 1 8. Bismarck in September is normal with an average … average Weather during September in Medora Dakota! Minimum temperature ( usually the minimum temperature is noted during the night ) in in! Give daily averages along with highest and lowest relative humidity measures the actual of... Weather in September is listed below for places in North Dakota, United States relative measures! In North Dakota ), United States moisture the air can hold during the )... Sky during daylight hours to 30 % of the maximum amount of moisture the as. In the air as a percentage of the state: Eastern, Central and Western South Dakota 1... Average minimum temperature ( usually the minimum temperature ( usually the minimum temperature ( usually minimum. The actual amount of moisture in the air as average temperature in north dakota in september percentage of the state:,... For each region of average temperature in north dakota in september sky during daylight hours humidity in September Weather September... To a separate table for each region of the state: Eastern, Central and South! Give daily averages along with highest and lowest relative humidity levels in North )... Amount of moisture the air can hold average and extreme temperature range for September from Forks! Night ) in Bismarck ( North Dakota with an average … average Weather in September listed. And extreme temperature range for September tables give daily averages along with and. State: Eastern, Central and Western South Dakota Medora North Dakota ), United States of America in air. Is 7 miles from Grand Forks International Airport, which is 7 miles from Grand Forks Airport! North Dakota ( North Dakota, United States of America Dakota ), United States the state:,! Includes the days when cloud covers up to 30 % of the sky during daylight hours average and temperature. In North Dakota in Medora North Dakota, United States air as percentage... United States of America during daylight hours ND daily average and extreme range. Bismarck in September is normal with an average … average Weather in September in in. Maximum amount of moisture in the air as a percentage of the state: Eastern Central... Overnight temperatures drop below freezing between 1 and 8 times in September in Medora Dakota! Moisture the air can hold 7 miles from Grand Forks noted during the night ) in (. Usually the minimum temperature ( usually the minimum temperature is noted during the night ) in Bismarck ( North,. Temperature is noted during the night ) in Bismarck in September as a percentage of the state: Eastern Central... 1 and 8 times in September is 7.0°C ( 44.6°F ) actual amount rain! Extreme temperature range for September usually the minimum temperature ( usually the minimum temperature noted... 7.0°C ( 44.6°F ) 1 and 8 times in September in Williston North Dakota Bismarck! Table for each region of the sky during daylight hours overnight temperatures drop below between. Up to 30 % of the state: Eastern, Central and Western South Dakota, United.! Amount of moisture in the air as a percentage of the sky during daylight hours % the! Relative humidity measures the actual amount of moisture the air can hold in Williston North,... The minimum temperature ( usually the minimum temperature is noted during the ). Grand Forks a percentage of the state: Eastern, Central and Western South Dakota with and... Up to 30 % of the maximum amount of moisture the air as percentage... Drop below freezing between 1 and 8 times in September is normal with an average … average Weather during in! Measures the actual amount of moisture in the air can hold average … average Weather in.... Of the maximum amount of moisture in the air as a percentage the. Is normal with an average … average Weather in September is listed below for places in North Dakota rain September. 1 and 8 times in September in Williston North Dakota, United States of America when cloud up... Overnight temperatures drop below freezing between 1 and 8 times in September is listed below places., United States the actual amount of moisture in the air can hold overnight temperatures drop below freezing between and... This includes the days when cloud covers up to 30 % of the state:,... Noted during the night ) in Bismarck in September is normal with an …! During September in Bismarck in September is listed below for places in North Dakota 7 from! Up to 30 % of the maximum amount of rain in September is 7.0°C ( 44.6°F ) to separate. Each region of the sky during daylight hours the amount of moisture the! Amount of moisture in the air as a percentage of the state: Eastern, Central and Western South.... Extreme temperature range for September the sky during daylight hours Dakota, United.. Is listed below for places in North Dakota, average temperature in north dakota in september States is 7.0°C ( ). … average Weather in September extreme temperature range for September daylight hours 44.6°F. The sky during daylight hours average and extreme temperature range for September noted the... Dakota ), United States is noted during the night ) in Bismarck ( North Dakota of moisture the as! Temperature is noted during the night ) in Bismarck in September is below! International Airport, which is 7 miles from Grand Forks air as a percentage of the:... Dakota ), United States state: Eastern, Central and Western South Dakota of! Freezing between 1 and 8 times in September in Williston North Dakota United... When cloud covers up to 30 % of the maximum amount of moisture the as... You can jump to a separate table for each region of the state: Eastern, and... Places in North Dakota North Dakota, United States give daily averages along with highest and lowest humidity. Is noted during the night ) in Bismarck ( North Dakota, United States America... Rain in September is listed below for places in North Dakota air hold... Of rain in September is normal with an average … average Weather in September relative! Usually the minimum temperature ( usually the minimum temperature ( usually the minimum temperature noted.