September weather forecast and climate
Greater Rochester International Airport, NY

What is the temperature in September in Greater Rochester International Airport?

In September, the average high-temperature is 71.6°F (22°C), and the average low-temperature is 51.8°F (11°C).

How many days does it rain in September in Greater Rochester International Airport?

In Greater Rochester International Airport, in September, during 11 rainfall days, typically, 3" (75mm) of precipitation is accumulated.

How cold is the water in September in Greater Rochester International Airport?

The average seawater temperature, in September, in Greater Rochester International Airport, is 66.2°F (19°C). For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).
Average temperature in September - Greater Rochester International Airport, NY
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in September: 52°F

Months with the highest average low temperature are July and August (59°F).
Coldest months (with the lowest average low temperature) are January and February (16°F).

Average rainfall in September - Greater Rochester International Airport, NY
  • Average rainfall in September: 3"

The wettest month (with the highest rainfall) is August (3.3").
Driest months (with the lowest rainfall) are January and February (2").

Average rainfall days in September - Greater Rochester International Airport, NY
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is December (17 days).
The month with the lowest number of rainy days is July (9 days).

Average sea temperature in September - Greater Rochester International Airport, NY
  • Average sea temperature in September: 66°F

The best month for swimming (with the highest average sea temperature) is August (70°F).
Coldest months (with the lowest average sea temperature) are February and March (36°F).

Average daylight in September / Average sunshine in September - Greater Rochester International Airport, NY
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 7h

Months with most sunshine are June and July (Average sunshine: 10h).
Months with least sunshine are January, November and December (Average sunshine: 3).

Average UV index in September - Greater Rochester International Airport, NY
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).

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