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 brings a slight decrease in temperature, down from 82.6°F (28.1°C) in August to a still moderately hot 75.4°F (24.1°C). In the month of September, the temperature generally rests at an average low of 58.5°F (14.7°C).Humidity
The average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 12 days and typically collects 1.57" (40mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Middlesex, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:41 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Middlesex, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Middlesex have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September in Middlesex?
Average temperature in September
Middlesex, NJ
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (35.6°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Middlesex, NJ
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Middlesex, NJ
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Middlesex, NJ
- Average humidity in September: 76%
The month with the highest relative humidity is February (79%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in September
Middlesex, NJ
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Middlesex, NJ
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Middlesex, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (4.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Middlesex, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Middlesex, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Middlesex, NJ
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Middlesex, NJ
- Average UV index in September: 4
The months with the highest UV index are June, July and August (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
Middlesex, NJ
- Average cloud cover in September: 40
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Middlesex, NJ
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Middlesex, New Jersey, USA
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