September weather forecast and climate
West Orange, NJ

September, the first month of the autumn, in West Orange, is also a moderately hot month, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 74.7°F (23.7°C).

Temperature

In September, the average high-temperature marginally drops, from 81.9°F (27.7°C) in August, to a still moderately hot 74.7°F (23.7°C). In September, in West Orange, the average low-temperature is 59.4°F (15.2°C).

Humidity

The average relative humidity in West Orange, New Jersey, is 75%.

Rainfall

In West Orange, during September, the rain falls for 11.2 days and regularly aggregates up to 0.75" (19mm) of precipitation. In West Orange, New Jersey, during the entire year, the rain falls for 127.3 days and collects up to 12.68" (322mm) of precipitation.

Snowfall

In West Orange snow does not fall in May through September.

Daylight

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

Sunshine

In September, the average sunshine in West Orange is 8.9h.

UV index

In September, the average daily maximum UV index in West Orange, New Jersey, is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in West Orange?

In West Orange, in September, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 59.4°F (15.2°C).

What is the average humidity in September in West Orange?

In September, the average relative humidity is 75%.

How many days does it rain in September in West Orange?

In West Orange, during September, the rain falls for 11.2 days and regularly aggregates up to 0.75" (19mm) of precipitation.

Does it snow in West Orange in September?

In West Orange, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in West Orange?

May through September are months without snowfall in West Orange.

How many hours of daylight does West Orange have in September?

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

How long on average sun shines in September in West Orange?

The average sunshine in September in West Orange is 8.9h.

What is the UV index intensity in September in West Orange?

In September, the average daily maximum UV index in West Orange is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - West Orange, NJ
  • Average high temperature in September: 23.7°C

The warmest month (with the highest average high temperature) is July (28.7°C).
The month with the lowest average high temperature is January (1.8°C).

  • Average low temperature in September: 15.2°C

The month with the highest average low temperature is July (19.8°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

Average pressure in September - West Orange, NJ
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is November (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in September - West Orange, NJ
  • Average wind speed in September: 10.2km/h

The windiest month (with the highest average wind speed) is January (14.3km/h).
The calmest months (with the lowest average wind speed) are July and August (9.3km/h).

Average humidity in September - West Orange, NJ
  • Average humidity in September: 75%

Months with the highest relative humidity are February and December (78%).
Months with the lowest relative humidity are April and August (72%).

Average rainfall in September - West Orange, NJ
  • Average rainfall in September: 19mm

The wettest month (with the highest rainfall) is July (41mm).
The driest month (with the least rainfall) is January (17mm).

Average rainfall days in September - West Orange, NJ
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (6.1 days).

Average snowfall in September - West Orange, NJ
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (31mm).
Months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September - West Orange, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.5 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in September - West Orange, NJ
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is July (12.5 days).

Average UV index in September - West Orange, NJ
  • Average UV index in September: 4

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 - West Orange, NJ
  • Average cloud cover in September: 36

Months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).

Average visibility in September - West Orange, 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).