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
With the onset of September, Marlow experiences a modest temperature adjustment, with the average high-temperature gently receding from a moderately hot 81.1°F (27.3°C) in August to a pleasant 72.3°F (22.4°C). During September, the average low-temperature is a cool 52.7°F (11.5°C).Humidity
The least humid month is September, with an average relative humidity of 64%.Rainfall
In Marlow, during September, the rain falls for 8.9 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Marlow, South Dakota, during the entire year, the rain falls for 98.2 days and collects up to 16.26" (413mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Marlow, South Dakota, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:51 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:10 pm CDT.
Sunshine
In Marlow, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. 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
What is the usual temperature for Marlow in September?
What is the least humid month?
What is the average humidity in September?
How much does it rain in Marlow in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Marlow, SD
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (18.1°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (5.2°F).
Average pressure in September
Marlow, SD
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Marlow, SD
- Average wind speed in September: 9.6mph
The windiest months (with the highest average wind speed) are April and October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Marlow, SD
- Average humidity in September: 64%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (64%).
Average rainfall in September
Marlow, SD
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Marlow, SD
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is June (14.3 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in September
Marlow, SD
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Marlow, SD
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marlow, SD
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Marlow, SD
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Marlow, 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 and December (UV index 1).
Average cloud cover in September
Marlow, SD
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 24).
Average visibility in September
Marlow, SD
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
Marlow, South Dakota, USA
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