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
With the beginning of September, the average high-temperature in Armour shows a small decrease, transitioning from a moderately hot 85.1°F (29.5°C) in August to a still warm 76.3°F (24.6°C). Armour records an average low of 55.4°F (13°C) throughout the nights in September.Humidity
In Armour, South Dakota, the average relative humidity in September is 63%.Rainfall
In Armour, during September, the rain falls for 9.4 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Armour, South Dakota, during the entire year, the rain falls for 104.1 days and collects up to 14.29" (363mm) of precipitation.Snowfall
In Armour, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:07 pm. On the last day of September, in Armour, sunrise is at 7:30 am and sunset at 7:15 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Armour?
What is the average humidity in September in Armour?
How much does it rain in Armour in September?
When it does not snow in Armour?
Does it snow in Armour in September?
What is the average length of the day in September in Armour?
When is the sunrise / sunset in September in Armour?
How many hours of sunshine does Armour have in September?
How high is the UV index in September in Armour?
Average temperature in September
Armour, SD
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in September: 55.4°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 (13.6°F).
Average pressure in September
Armour, SD
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Armour, SD
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in September
Armour, SD
- Average humidity in September: 63%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (62%).
Average rainfall in September
Armour, SD
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in September
Armour, SD
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Armour, SD
- Average snowfall in September: 0"
The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Armour, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Armour, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Armour, SD
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Armour, 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
Armour, SD
- Average cloud cover in September: 24
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in September
Armour, 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).
Armour, South Dakota, USA
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