September weather forecast and climate
Deans, NJ

September, the first month of the autumn, in Deans, is also a moderately hot month, with average temperature fluctuating between 75.9°F (24.4°C) and 59.9°F (15.5°C).

Temperature

In Deans, the average high-temperature slightly decreases, from 82.6°F (28.1°C) in August, to a still warm 75.9°F (24.4°C). In September, the average low-temperature is 59.9°F (15.5°C).

Humidity

In September, the average relative humidity in Deans is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day is 12.4h.

Sunshine

The average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Deans?

In Deans, in September, the average high-temperature is 75.9°F (24.4°C), and the average low-temperature is 59.9°F (15.5°C).

What is the average humidity in September in Deans?

In September, the average relative humidity in Deans is 75%.

How much does it rain in Deans in September?

In September, in Deans, the rain falls for 12.3 days. Throughout September, 1.46" (37mm) of precipitation is accumulated.

What is the driest month in Deans?

The month with the least rainfall in Deans, New Jersey, is September when the rain falls for 12.3 days and typically collects 1.46" (37mm) of precipitation.

Does it snow in Deans in September?

In Deans, New Jersey, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Deans?

In Deans snow does not fall in June through September.

What is the average length of the day in September in Deans?

The average length of the day in September in Deans is 12.4h.

How many hours of sunshine does Deans have in September?

The average sunshine in September in Deans, New Jersey, is 8.6h.

How high is the UV index in September in Deans?

The average daily maximum UV index in September in Deans, New Jersey, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.
Average temperature in September - Deans, NJ
  • Average high temperature in September: 24.4°C

The warmest month (with the highest average high temperature) is July (29.2°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in September: 15.5°C

The month with the highest average low temperature is July (20°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).

Average pressure in September - Deans, NJ
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is November (1019.6mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in September - Deans, NJ
  • Average wind speed in September: 10.3km/h

The windiest month (with the highest average wind speed) is March (14.7km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).

Average humidity in September - Deans, NJ
  • Average humidity in September: 75%

Months with the highest relative humidity are February, May, October and December (77%).
Months with the lowest relative humidity are April and August (73%).

Average rainfall in September - Deans, NJ
  • Average rainfall in September: 37mm

The wettest month (with the highest rainfall) is December (79mm).
The driest month (with the least rainfall) is September (37mm).

Average rainfall days in September - Deans, NJ
  • Average rainfall days in September: 12.3 days

Months with the highest number of rainy days are May and June (16.2 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in September - Deans, NJ
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (81mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Deans, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Deans, NJ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in September - Deans, NJ
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is June (12 days).

Average UV index in September - Deans, NJ
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Deans, NJ
  • Average cloud cover in September: 38

Months with the most cloud cover are February and December (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in September - Deans, NJ
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).