September weather forecast and climate
Riverdale, NJ

What is the temperature in September in Riverdale?

The average high-temperature, in September, is 73.9°F (23.3°C), while the average low-temperature is 54°F (12.2°C).

How much does it rain in Riverdale in September?

During September, Riverdale regularly aggregates up to 4.6" (116.3mm) of precipitation.

What is the wettest month in Riverdale?

The month with the most rainfall in Riverdale is September when 4.6" (116.3mm) of precipitation is typically aggregated.
Average temperature in September - Riverdale, NJ
  • Average high temperature in September: 74°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 54°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average rainfall in September - Riverdale, NJ
  • Average rainfall in September: 4.6"

The wettest month (with the highest rainfall) is September (4.6").
The driest month (with the lowest rainfall) is February (3").

Average daylight in September - Riverdale, NJ
  • Average daylight in September: 12.5h

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