Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from 85.6°F (29.8°C) in August to a still moderately hot 77°F (25°C). In Wounded Knee, the September nights cool down to an average low of 55.9°F (13.3°C).Humidity
In Wounded Knee, South Dakota, the average relative humidity in September is 49%.Rainfall
In September, the rain falls for 6.1 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Wounded Knee, during the entire year, the rain falls for 86.7 days and collects up to 13.66" (347mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Wounded Knee. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 47.4 snowfall days, and 22.72" (577mm) of snow is accumulated.Daylight
In Wounded Knee, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:23 pm. On the last day of September, in Wounded Knee, South Dakota, sunrise is at 6:46 am and sunset at 6:31 pm MDT.
Sunshine
In September, the average sunshine in Wounded Knee is 10.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average September temperature in Wounded Knee?
What is the average humidity in September in Wounded Knee?
How many days does it rain in September in Wounded Knee?
When does it start snowing in Wounded Knee?
What is the average length of the day in September in Wounded Knee?
What time are sunrise and sunset in September in Wounded Knee?
How many hours of sunshine does Wounded Knee have in September?
How high is the UV index in September in Wounded Knee?
Average temperature in September
Wounded Knee, SD
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Wounded Knee, SD
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Wounded Knee, SD
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in September
Wounded Knee, SD
- Average humidity in September: 49%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in September
Wounded Knee, SD
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Wounded Knee, SD
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in September
Wounded Knee, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Wounded Knee, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Wounded Knee, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Wounded Knee, SD
- Average sunshine days in September: 22.8 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in September
Wounded Knee, SD
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Wounded Knee, SD
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Wounded Knee, SD
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Wounded Knee, South Dakota, USA
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