September weather forecastNorris, SD
September
Weather in September
September, the first month of the autumn in Norris, is also a moderately hot month, with temperature in the range of an average low of 58.3°F (14.6°C) and an average high of 77.5°F (25.3°C).Temperature
Norris experiences a temperature shift at the start of September, with average high-temperatures adjusting from a tropical 87.1°F (30.6°C) in August to a moderately hot 77.5°F (25.3°C). Throughout the month of September, Norris witnesses an average temperature of 58.3°F (14.6°C).Humidity
With an average relative humidity of 47%, September is the least humid month in Norris.Rainfall
In Norris, in September, it is raining for 8.5 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, there are 95.3 rainfall days, and 13.74" (349mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:09 am and sunset at 8:19 pm. On the last day of September, in Norris, sunrise is at 7:42 am and sunset at 7:27 pm CDT.
Sunshine
The average sunshine in September is 9.9h.UV index
The average daily maximum UV index in September in Norris is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Exercise prevention - Warding off sunburn is urged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Norris, SD
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Norris, SD
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Norris, SD
- Average wind speed in September: 11.1mph
The windiest month (with the highest average wind speed) is April (12.1mph).
The calmest month (with the lowest average wind speed) is February (10.1mph).
Average humidity in September
Norris, SD
- Average humidity in September: 47%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is September (47%).
Average rainfall in September
Norris, SD
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Norris, SD
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in September
Norris, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Norris, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Norris, SD
- Average daylight in September: 12h and 30min
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 54min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in September
Norris, SD
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is December (21.1 days).
The months with the least sunshine days are April and June (14.1 days).
Average UV index in September
Norris, SD
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Norris, SD
- Average cloud cover in September: 19
The month with the most cloud cover is January (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in September
Norris, 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).
