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
September brings a slight decrease in temperature, down from 84°F (28.9°C) in August to a still moderately hot 75.2°F (24°C). In Smithwick, an average nighttime temperature of 54°F (12.2°C) is expected during September.Humidity
In Smithwick, the average relative humidity in September is 48%.Rainfall
In September, in Smithwick, the rain falls for 9.3 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Smithwick, during the entire year, the rain falls for 115.8 days and collects up to 16.61" (422mm) 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. Throughout the year, there are 49.2 snowfall days, and 23.19" (589mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 29min.On the first day of September in Smithwick, sunrise is at 6:17 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:35 pm MDT.
Sunshine
In Smithwick, the average sunshine in September is 10.4h.UV index
In Smithwick, South Dakota, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Undertake precautions - Guarding against sun damage is counselled. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
What is the usual temperature for Smithwick in September?
What is the average humidity in September in Smithwick?
How many days does it rain in September in Smithwick?
When does it start snowing in Smithwick?
What is the average length of the day in September in Smithwick?
What time are sunrise and sunset in September in Smithwick?
How many hours of sunshine does Smithwick have in September?
What is the UV index intensity in September in Smithwick?
Average temperature in September
Smithwick, SD
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (63.9°F).
The coldest months (with the lowest average low temperature) are February and December (18.5°F).
Average pressure in September
Smithwick, SD
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Smithwick, SD
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Smithwick, SD
- Average humidity in September: 48%
The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Smithwick, SD
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Smithwick, SD
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is December (3.5 days).
Average snowfall in September
Smithwick, SD
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Smithwick, SD
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Smithwick, 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: 10h and 2min
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 48min).
Average sunshine days in September
Smithwick, SD
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is December (21.4 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Smithwick, 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
Smithwick, SD
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Smithwick, 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).
Smithwick, South Dakota, USA
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