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 80.2°F (26.8°C) in August to a still moderately hot 74.3°F (23.5°C). Nights during September maintain a steady temperature, averaging at an enjoyable 65.3°F (18.5°C).Humidity
The average relative humidity in September is 77%.Rainfall
January and September are months with the least rain when the rain falls for 8.9 days and typically aggregates up to 0.67" (17mm) of rain.Snowfall
In New Gretna, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:41 pm EDT.
Sunshine
In New Gretna, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Heed the precautions - It is counselled to guard against solar damage. To guard against the harmful effects of the Sun, minimize exposure during midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
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?
What is the UV index reading in September?
Average temperature in September
New Gretna, NJ
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
New Gretna, NJ
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
New Gretna, NJ
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is August (7.9mph).
Average humidity in September
New Gretna, NJ
- Average humidity in September: 77%
The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in September
New Gretna, NJ
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is July (1.18").
The driest months (with the least rainfall) are January and September (0.67").
Average rainfall days in September
New Gretna, NJ
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in September
New Gretna, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
New Gretna, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
New Gretna, NJ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
New Gretna, NJ
- Average sunshine days in September: 19.1 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is July (15.6 days).
Average UV index in September
New Gretna, NJ
- Average UV index in September: 5
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 and December (UV index 2).
Average cloud cover in September
New Gretna, NJ
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
New Gretna, NJ
- 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).
New Gretna, New Jersey, USA
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