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
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 80.4°F (26.9°C) to a still warm 74.1°F (23.4°C). September brings with it a nighttime average temperature of 63.3°F (17.4°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Jerseyville, New Jersey, in September, it is raining for 13.5 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, there are 162 rainfall days, and 32.2" (818mm) of precipitation is accumulated.Snowfall
In Jerseyville, snow does not fall in May through September.Daylight
In Jerseyville, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:25 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.
Sunshine
In Jerseyville, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Jerseyville have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Jerseyville have in September?
How high is the UV index in September?
Average temperature in September
Jerseyville, NJ
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in September
Jerseyville, 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
Jerseyville, NJ
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Jerseyville, NJ
- Average humidity in September: 77%
The months with the highest relative humidity are May and June (79%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in September
Jerseyville, NJ
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in September
Jerseyville, NJ
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in September
Jerseyville, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Jerseyville, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jerseyville, 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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Jerseyville, NJ
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Jerseyville, 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, March, November and December (UV index 2).
Average cloud cover in September
Jerseyville, NJ
- Average cloud cover in September: 33
The months with the most cloud cover are February, March and December (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Jerseyville, 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).
Jerseyville, New Jersey, USA
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