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
The shift from August to September includes a small decrease in the average high-temperature, from a warm 80.8°F (27.1°C) to a still moderately hot 74.1°F (23.4°C). An average low-temperature of 53.2°F (11.8°C) is noted during the nights in September.Humidity
The average relative humidity in September is 70%.Rainfall
In September, in Rowena, South Dakota, the rain falls for 10.8 days. Throughout September, 1.93" (49mm) of precipitation is accumulated. In Rowena, during the entire year, the rain falls for 112.2 days and collects up to 20.67" (525mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Rowena is 12h and 29min.On the first day of September, sunrise is at 6:50 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:08 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Rowena is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What are September temperatures in Rowena?
What is the average humidity in September in Rowena?
How many days does it rain in September in Rowena?
When it does not snow in Rowena?
Does it snow in Rowena in September?
What is the average length of the day in September in Rowena?
When are sunrise and sunset in September in Rowena?
How long on average sun shines in September in Rowena?
What is the UV index intensity in September in Rowena?
Average temperature in September
Rowena, SD
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in September
Rowena, SD
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Rowena, SD
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in September
Rowena, SD
- Average humidity in September: 70%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Rowena, SD
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in September
Rowena, SD
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Rowena, SD
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rowena, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rowena, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Rowena, SD
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Rowena, 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
Rowena, SD
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Rowena, 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).
Rowena, South Dakota, USA
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