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
In September, the average high-temperature marginally drops from a moderately hot 82.6°F (28.1°C) in August to a still warm 73.8°F (23.2°C). September nights observe an average temperature dip to a fresh 53.4°F (11.9°C).Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 49%.Rainfall
In Vale, in September, during 9 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. In Vale, South Dakota, during the entire year, the rain falls for 126.3 days and collects up to 16.77" (426mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Vale, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:35 pm MDT.
Sunshine
In September, the average sunshine in Vale, South Dakota, is 10.4h.UV index
In Vale, South Dakota, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Vale in September?
What are the least humid months in Vale?
What is the average humidity in September in Vale?
How much does it rain in Vale in September?
When does it start snowing in Vale?
What is the average length of the day in September in Vale?
When are sunrise and sunset in September in Vale?
How long on average sun shines in September in Vale?
What is the UV index reading in September in Vale?
Average temperature in September
Vale, SD
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in September
Vale, SD
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Vale, SD
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity in September
Vale, SD
- Average humidity in September: 49%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (49%).
Average rainfall in September
Vale, SD
- Average rainfall in September: 0.83"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Vale, SD
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is December (5.8 days).
Average snowfall in September
Vale, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is April (8.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Vale, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Vale, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in September
Vale, SD
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in September
Vale, 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, November and December (UV index 2).
Average cloud cover in September
Vale, SD
- Average cloud cover in September: 18
The months with the most cloud cover are February and April (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Vale, 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).
Vale, South Dakota, USA
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