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 is characterized by a slight reduction in average high-temperature, easing from a warm 81.1°F (27.3°C) in August to a still moderately hot 74.5°F (23.6°C). In Stewartsville, September's nights observe an average temperature dip to a fresh 55.2°F (12.9°C).Humidity
In September, the average relative humidity in Stewartsville is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 8.9 days and accumulates 0.71" (18mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Ensure safety - Sun damage prevention is strongly urged. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Stewartsville in September?
What is the average humidity in September in Stewartsville?
What is the driest month in Stewartsville?
How many days does it rain in September in Stewartsville?
When it does not snow in Stewartsville?
How many hours of daylight does Stewartsville have in September?
What time are sunrise and sunset in September in Stewartsville?
How many hours of sunshine does Stewartsville have in September?
What is the UV index intensity in September in Stewartsville?
Average temperature in September
Stewartsville, NJ
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Stewartsville, NJ
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Stewartsville, NJ
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Stewartsville, NJ
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in September
Stewartsville, NJ
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (1.65").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in September
Stewartsville, NJ
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in September
Stewartsville, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Stewartsville, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Stewartsville, NJ
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Stewartsville, NJ
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (14 days).
Average UV index in September
Stewartsville, NJ
- 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, March, November and December (UV index 2).
Average cloud cover in September
Stewartsville, NJ
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Stewartsville, NJ
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Stewartsville, New Jersey, USA
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