September weather forecastMount Rushmore National Memorial, SD
September
Weather in September
September sees a withdrawal from the summer season with a noticeable reduction in temperature to 67.8°F (19.9°C). The decrease in daylight hours indicates the onset of the autumn season, reflecting the shift from longer to shorter days. Despite the decline in temperature, conditions remain pleasant and warm, ensuring comfortable outdoor exploration. As for precipitation, rainfall follows a downward trajectory, and snowfall re-enters the scene after a gap of four months. Those visiting Mount Rushmore National Memorial in September can catch the beautiful transition of the seasons.Temperature
In Mount Rushmore National Memorial, the average high-temperature in September drops from a warm 78.1°F (25.6°C) in August to a refreshing 67.8°F (19.9°C). September brings an average low-temperature of 48.2°F (9°C) to Mount Rushmore National Memorial.Rainfall
In Mount Rushmore National Memorial, South Dakota, during September, the rain falls for 7.4 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Mount Rushmore National Memorial, during the entire year, the rain falls for 91.5 days and collects up to 21.57" (548mm) of precipitation.Snowfall
Months with snowfall in Mount Rushmore National Memorial are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.59" (15mm) of snow. In Mount Rushmore National Memorial, during the entire year, snow falls for 23.1 days and aggregates up to 52.4" (1331mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:28 pm. On the last day of September, in Mount Rushmore National Memorial, sunrise is at 6:51 am and sunset at 6:35 pm MDT.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Rushmore National Memorial, SD
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is July (79.1°F).
The month with the lowest average high temperature is December (35.3°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is July (58.9°F).
The coldest month (with the lowest average low temperature) is December (18.1°F).
Average rainfall in September
Mount Rushmore National Memorial, SD
- Average rainfall in September: 1.8"
The wettest month (with the highest rainfall) is May (4.2").
The driest months (with the least rainfall) are January and December (0.4").
Average rainfall days in September
Mount Rushmore National Memorial, SD
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is June (12.6 days).
The month with the least rainy days is December (4.2 days).
Average snowfall in September
Mount Rushmore National Memorial, SD
- Average snowfall in September: 0.6"
The month with the highest snowfall is April (10.8").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Mount Rushmore National Memorial, SD
- Average snowfall days in September: 0.3 days
The months with the highest number of snowfall days are January and March (3.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September
Mount Rushmore National Memorial, SD
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
