September weather forecast
Lake Riviera, NJ

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Weather in September

September, the first month of the autumn in Lake Riviera, is also a moderately hot month, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 73.6°F (23.1°C).

Temperature

The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 79.7°F (26.5°C) to a still warm 73.6°F (23.1°C). In Lake Riviera, the nighttime temperature shows a slight difference from the daytime high, averaging to a comfortable 64.6°F (18.1°C) during September.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Lake Riviera, in September, during 12.3 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 137.7 rainfall days, and 19.09" (485mm) of precipitation is accumulated.

Snowfall

In Lake Riviera, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:25 am and sunset at 7:27 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:40 pm EDT.

Sunshine

The average sunshine in September in Lake Riviera is 9h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In September, the maximum UV index of 5 suggests these recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The average high-temperature, in September, in Lake Riviera, is 73.6°F (23.1°C), while the average low-temperature is 64.6°F (18.1°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 77%.

How much does it rain in September?

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

When it does not snow?

In Lake Riviera, snow does not fall in April through October.

What is the average length of the day in September?

In Lake Riviera, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September in Lake Riviera?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm EDT.

How many hours of sunshine does Lake Riviera have in September?

The average sunshine duration in September is 9h.

What is the UV index intensity in September?

In Lake Riviera, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Lake Riviera, NJ

Average temperature in September - Lake Riviera, NJ
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

Average pressure in September
Lake Riviera, NJ

Average pressure in September - Lake Riviera, 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
Lake Riviera, NJ

Average wind speed in September - Lake Riviera, NJ
  • Average wind speed in September: 9.3mph

The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).

Average humidity in September
Lake Riviera, NJ

Average humidity in September - Lake Riviera, NJ
  • Average humidity in September: 77%

The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January, March and November (74%).

Average rainfall in September
Lake Riviera, NJ

Average rainfall in September - Lake Riviera, NJ
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is January (0.94").

Average rainfall days in September
Lake Riviera, NJ

Average rainfall days in September - Lake Riviera, NJ
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is January (7 days).

Average snowfall in September
Lake Riviera, NJ

Average snowfall in September - Lake Riviera, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Lake Riviera, NJ

Average snowfall days in September - Lake Riviera, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.4 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
Lake Riviera, NJ

Average daylight in September / Average sunshine in September - Lake Riviera, 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 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
Lake Riviera, NJ

Average sunshine days in September - Lake Riviera, NJ
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is July (11.9 days).

Average UV index in September
Lake Riviera, NJ

Average UV index in September - Lake Riviera, 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, November and December (UV index 2).

Average cloud cover in September
Lake Riviera, NJ

Average cloud cover in September - Lake Riviera, NJ
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in September
Lake Riviera, NJ

Average visibility in September - Lake Riviera, 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).

Lake Riviera, New Jersey, USA

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