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's onset corresponds with a shift in the average high-temperature, moving from 85.8°F (29.9°C) in August to a still moderately hot 76.6°F (24.8°C). Throughout September, the temperature in Hamill tends to fall to a consistent average low of 56.3°F (13.5°C).Humidity
August and September, with an average relative humidity of 57%, are the least humid months in Hamill.Rainfall
In Hamill, in September, it is raining for 9.5 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, in Hamill, there are 103.9 rainfall days, and 16.85" (428mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Hamill, South Dakota.Daylight
In Hamill, South Dakota, the average length of the day in September is 12h and 29min.On the first day of September in Hamill, South Dakota, sunrise is at 7:03 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:20 pm CDT.
Sunshine
The average sunshine in September in Hamill is 9h.UV index
In Hamill, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the temperature in September in Hamill?
What is the least humid month in Hamill?
What is the average humidity in September in Hamill?
How much does it rain in Hamill in September?
When it does not snow in Hamill?
Does it snow in Hamill in September?
What is the average length of the day in September in Hamill?
What time are sunrise and sunset in September in Hamill?
How many hours of sunshine does Hamill have in September?
How high is the UV index in September in Hamill?
Average temperature in September
Hamill, SD
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Hamill, SD
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Hamill, SD
- Average wind speed in September: 10.7mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (9.8mph).
Average humidity in September
Hamill, SD
- Average humidity in September: 57%
The month with the highest relative humidity is January (82%).
The months with the lowest relative humidity are August and September (57%).
Average rainfall in September
Hamill, SD
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Hamill, SD
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is June (15.3 days).
The months with the least rainy days are January and February (2.7 days).
Average snowfall in September
Hamill, SD
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hamill, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hamill, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Hamill, SD
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in September
Hamill, SD
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Hamill, SD
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in September
Hamill, 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).
Hamill, South Dakota, USA
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