Weather in September
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 comfortable 67.8°F (19.9°C). In Mount Rushmore National Memorial, in September, the average low-temperature is 48.2°F (9°C).Rainfall
In September, the rain falls for 7.4 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. 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 are January through June, September through December. September is the first month it typically snows in Mount Rushmore National Memorial. 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
The average length of the day in September in Mount Rushmore National Memorial is 12h and 29min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:30 pm. On the last day of September, in Mount Rushmore National Memorial, sunrise is at 6:50 am and sunset at 6:37 pm MDT.
FAQ
What is the temperature in September in Mount Rushmore National Memorial?
How much does it rain in Mount Rushmore National Memorial in September?
When does it start to snow in Mount Rushmore National Memorial?
What is the average length of the day in September in Mount Rushmore National Memorial?
When are sunrise and sunset in September in Mount Rushmore National Memorial?
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 29min
The month with the longest days is June (Average daylight: 15h and 25min).
The month with the shortest days is December (Average daylight: 8h and 58min).
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