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 arrival of September signals a subtle shift in temperature, down from 84.6°F (29.2°C) in August to a still warm 75.7°F (24.3°C). Nighttime temperatures hover around an average low of 55.8°F (13.2°C) in September.Humidity
With an average relative humidity of 56%, September is the least humid month.Rainfall
In Parmelee, in September, during 10.2 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 109.2 rainfall days, and 16.89" (429mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. In Parmelee, during the entire year, snow falls for 41.1 days and aggregates up to 14.53" (369mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 7:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:26 pm CDT.
Sunshine
In Parmelee, South Dakota, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the least humid month?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
How many hours of daylight does Parmelee have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Parmelee have in September?
What is the UV index reading in September?
Average temperature in September
Parmelee, SD
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in September
Parmelee, SD
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Parmelee, SD
- Average wind speed in September: 11.7mph
The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest months (with the lowest average wind speed) are July and August (10.6mph).
Average humidity in September
Parmelee, SD
- Average humidity in September: 56%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is September (56%).
Average rainfall in September
Parmelee, SD
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Parmelee, SD
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Parmelee, SD
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Parmelee, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Parmelee, 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 0min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Parmelee, SD
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in September
Parmelee, SD
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Parmelee, SD
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 44).
The months with the least cloud cover are July, August and September (Cloud cover 21).
Average visibility in September
Parmelee, 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).
Parmelee, South Dakota, USA
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