September weather forecast and climate
Florence, NJ

The first month of the autumn, September, is still a warm month in Florence, New Jersey, with average temperature fluctuating between 59.9°F (15.5°C) and 76.5°F (24.7°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 83.1°F (28.4°C) in August, to a still warm 76.5°F (24.7°C). In September, in Florence, the average low-temperature is 59.9°F (15.5°C).

Humidity

In Florence, the average relative humidity in September is 76%.

Rainfall

In September, the rain falls for 12.7 days. Throughout September, 1.93" (49mm) of precipitation is accumulated. Throughout the year, there are 154.4 rainfall days, and 31.38" (797mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall in Florence.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine in Florence is 8.8h.

UV index

In September, the average daily maximum UV index in Florence is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Florence?

In Florence, in September, the average high-temperature is 76.5°F (24.7°C), and the average low-temperature is 59.9°F (15.5°C).

What is the average humidity in September in Florence?

In September, the average relative humidity in Florence is 76%.

How many days does it rain in September in Florence?

In Florence, in September, it is raining for 12.7 days, with typically 1.93" (49mm) of accumulated precipitation.

When it does not snow in Florence?

June through October are months without snowfall.

How many hours of daylight does Florence have in September?

In Florence, New Jersey, the average length of the day in September is 12.4h.

How long on average sun shines in September in Florence?

The average sunshine in September in Florence, New Jersey, is 8.8h.

How high is the UV index in September in Florence?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in September - Florence, NJ
  • Average high temperature in September: 24.7°C

The warmest month (with the highest average high temperature) is July (29.7°C).
The month with the lowest average high temperature is January (2.8°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 - Florence, NJ
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is November (1019.8mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in September - Florence, NJ
  • Average wind speed in September: 9.6km/h

The windiest month (with the highest average wind speed) is March (13.8km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

Average humidity in September - Florence, NJ
  • Average humidity in September: 76%

Months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in September - Florence, NJ
  • Average rainfall in September: 49mm

The wettest month (with the highest rainfall) is July (93mm).
The driest month (with the least rainfall) is January (48mm).

Average rainfall days in September - Florence, NJ
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8 days).

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

The month with the highest snowfall is March (76mm).
Months with the least snowfall are June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is January (4.8 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Florence, 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: 9.4h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in September - Florence, NJ
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September - Florence, NJ
  • Average UV index in September: 4

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

Average cloud cover in September - Florence, NJ
  • Average cloud cover in September: 37

Months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

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

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).