September weather forecastHillsview, SD
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Hillsview, South Dakota, with an average temperature ranging between min 54.5°F (12.5°C) and max 74.5°F (23.6°C).Temperature
September comes with a decrease in the average high-temperature, falling from 84.2°F (29°C) in August to a still moderately hot 74.5°F (23.6°C). Hillsview experiences a steady low-temperature of 54.5°F (12.5°C) throughout September.Humidity
In September, the average relative humidity is 53%.Rainfall
In September, the rain falls for 7.1 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Hillsview, during the entire year, the rain falls for 89.4 days and collects up to 15.39" (391mm) of precipitation.Snowfall
In Hillsview, snow does not fall in June through September.Daylight
In Hillsview, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 7:00 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:19 pm CDT.
Sunshine
In Hillsview, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hillsview, SD
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Hillsview, SD
- Average pressure in September: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Hillsview, SD
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is February (9.4mph).
Average humidity in September
Hillsview, SD
- Average humidity in September: 53%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (52%).
Average rainfall in September
Hillsview, SD
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Hillsview, SD
- Average rainfall days in September: 7.1 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Hillsview, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hillsview, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hillsview, SD
- Average daylight in September: 12h and 30min
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 36min
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 6min).
Average sunshine days in September
Hillsview, SD
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.6 days).
Average UV index in September
Hillsview, 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 and December (UV index 1).
Average cloud cover in September
Hillsview, SD
- Average cloud cover in September: 24
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in September
Hillsview, 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).
