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
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 82.4°F (28°C) to a still warm 75.7°F (24.3°C). During September, Jamesburg experiences an average low-temperature of 60.6°F (15.9°C) at night.Humidity
The average relative humidity in September in Jamesburg, New Jersey, is 75%.Rainfall
September is the month with the least rainfall in Jamesburg. Rain falls for 7.5 days and accumulates 0.28" (7mm) of precipitation.Snowfall
In Jamesburg, snow does not fall in April through October.Daylight
The average length of the day in September in Jamesburg is 12h and 27min.On the first day of September in Jamesburg, New Jersey, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:41 pm EDT.
Sunshine
The average sunshine in September in Jamesburg is 8.7h.UV index
In September, the average daily maximum UV index in Jamesburg, New Jersey, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What is the usual temperature for Jamesburg in September?
What is the average humidity in September in Jamesburg?
What is the driest month in Jamesburg?
How many days does it rain in September in Jamesburg?
When it does not snow in Jamesburg?
How many hours of daylight does Jamesburg have in September?
When is the sunrise / sunset in September in Jamesburg?
How long on average sun shines in September in Jamesburg?
How high is the UV index in September in Jamesburg?
Average temperature in September
Jamesburg, NJ
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in September
Jamesburg, NJ
- Average pressure in September: 30.05"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
Jamesburg, NJ
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Jamesburg, NJ
- Average humidity in September: 75%
The months with the highest relative humidity are February, May, October and December (77%).
The months with the lowest relative humidity are April and August (73%).
Average rainfall in September
Jamesburg, NJ
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is July (0.94").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in September
Jamesburg, NJ
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is July (10.7 days).
The months with the least rainy days are January and November (4.8 days).
Average snowfall in September
Jamesburg, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Jamesburg, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Jamesburg, NJ
- Average daylight in September: 12h and 2min
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 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Jamesburg, NJ
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is July (15.7 days).
Average UV index in September
Jamesburg, NJ
- Average UV index in September: 5
The months with the highest UV index are May, 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
Jamesburg, NJ
- Average cloud cover in September: 37
The months with the most cloud cover are February, March and December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Jamesburg, 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).
Jamesburg, New Jersey, USA
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