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 mild shift in the average high-temperature occurs in September, reducing from 82°F (27.8°C) in August to a still warm 75.9°F (24.4°C). Throughout September, the nighttime temperature averages to a refreshing 62.8°F (17.1°C).Humidity
In Dorchester, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Dorchester, during the entire year, the rain falls for 132.2 days and collects up to 15.39" (391mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Dorchester is 12h and 26min.On the first day of September, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm EDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Dorchester, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Dorchester?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Dorchester?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Dorchester have in September?
How high is the UV index in September?
Average temperature in September
Dorchester, NJ
- Average high temperature in September: 75.9°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 (39°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in September
Dorchester, NJ
- Average pressure in September: 30.04"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
Dorchester, NJ
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Dorchester, NJ
- Average humidity in September: 78%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Dorchester, NJ
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is August (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Dorchester, NJ
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in September
Dorchester, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dorchester, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4 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
Dorchester, 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 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Dorchester, NJ
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Dorchester, 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 and December (UV index 2).
Average cloud cover in September
Dorchester, NJ
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Dorchester, 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).
Dorchester, New Jersey, USA
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