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
Ferney, South Dakota, experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a moderately hot 83.1°F (28.4°C) in August to a still warm 74.3°F (23.5°C). The average low-temperature during September nights is a cool 52.9°F (11.6°C).Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 60%.Rainfall
In Ferney, in September, it is raining for 8.9 days, with typically 1.26" (32mm) of accumulated precipitation. In Ferney, during the entire year, the rain falls for 97.2 days and collects up to 18.35" (466mm) of precipitation.Snowfall
June through September are months without snowfall in Ferney.Daylight
In Ferney, the average length of the day in September is 12h and 31min.On the first day of September in Ferney, sunrise is at 6:54 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:13 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Exercise prevention - Precautions against solar damage are endorsed. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Ferney in September?
What is the least humid month in Ferney?
What is the average humidity in September in Ferney?
How much does it rain in Ferney in September?
When it does not snow in Ferney?
Does it snow in Ferney in September?
What is the average length of the day in September in Ferney?
When are sunrise and sunset in September in Ferney?
How long on average sun shines in September in Ferney?
What is the UV index intensity in September in Ferney?
Average temperature in September
Ferney, SD
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Ferney, SD
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Ferney, SD
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in September
Ferney, SD
- Average humidity in September: 60%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (60%).
Average rainfall in September
Ferney, SD
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Ferney, SD
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Ferney, SD
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ferney, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ferney, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Ferney, SD
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (12.7 days).
Average UV index in September
Ferney, SD
- Average UV index in September: 4
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 and November (UV index 1).
Average cloud cover in September
Ferney, SD
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility in September
Ferney, SD
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Ferney, South Dakota, USA
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