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
September's onset brings a negligible change in high-temperatures, falling from a moderately hot 75.7°F (24.3°C) in August to a pleasant 69.1°F (20.6°C). South Plymouth cools down to an average low-temperature of 49.3°F (9.6°C) throughout the month of September.Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.46" (37mm) of precipitation.Snowfall
In South Plymouth, snow does not fall in June through September.Daylight
In South Plymouth, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:36 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:44 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In South Plymouth, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Ensure safety - Recommendations to avert sunburn are presented. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month in South Plymouth?
How many days does it rain in September in South Plymouth?
When it does not snow?
Does it snow in September?
How many hours of daylight does South Plymouth have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
South Plymouth, NY
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is July (56.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in September
South Plymouth, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
South Plymouth, NY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
South Plymouth, NY
- Average humidity in September: 81%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May and July (80%).
Average rainfall in September
South Plymouth, NY
- Average rainfall in September: 1.46"
The wettest months (with the highest rainfall) are May and June (2.44").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in September
South Plymouth, NY
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
South Plymouth, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
South Plymouth, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Plymouth, NY
- Average daylight in September: 12h and 3min
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 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).
Average sunshine days in September
South Plymouth, NY
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is September (15.7 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
South Plymouth, NY
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
South Plymouth, NY
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
South Plymouth, NY
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
South Plymouth, New York, USA
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