September weather forecastHudson, SD
September
Weather in September
September, the first month of the autumn in Hudson, is also a moderately hot month, with an average temperature fluctuating between 74.3°F (23.5°C) and 54°F (12.2°C).Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from 80.4°F (26.9°C) in August to a still warm 74.3°F (23.5°C). Nightly temperatures drop to an average low of 54°F (12.2°C) in September.Humidity
In Hudson, the average relative humidity in September is 71%.Rainfall
In September, the rain falls for 11.8 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 130 rainfall days, and 24.09" (612mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Hudson.Daylight
The average length of the day in September is 12h and 29min.On the first day of September in Hudson, sunrise is at 6:51 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:08 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In Hudson, South Dakota, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hudson, SD
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Hudson, SD
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Hudson, SD
- Average wind speed in September: 9.2mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Hudson, SD
- Average humidity in September: 71%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Hudson, SD
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Hudson, SD
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Hudson, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hudson, 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
Hudson, SD
- Average daylight in September: 12h and 30min
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 6min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Hudson, SD
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in September
Hudson, SD
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Hudson, SD
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Hudson, 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).
