September weather forecast and climate
Summit, NY

The first month of the autumn, September, is still a pleasant month in Summit, New York, with average temperature fluctuating between 69.1°F (20.6°C) and 49.1°F (9.5°C).

Temperature

In Summit, the average high-temperature in September marginally drops, from a moderately hot 75.9°F (24.4°C) in August, to a pleasant 69.1°F (20.6°C). In Summit, in September, the average low-temperature is 49.1°F (9.5°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

The month with the least rainfall is September when the rain falls for 12.5 days and typically collects 2.13" (54mm) of precipitation.

Snowfall

In Summit snow does not fall in June through September.

Daylight

In Summit, the average length of the day is 12.5h.

Sunshine

In Summit, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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 Summit?

In September, in Summit, the average high-temperature is 69.1°F (20.6°C), and the average low-temperature is 49.1°F (9.5°C).

What is the average humidity in September in Summit?

In September, the average relative humidity is 80%.

How much does it rain in Summit in September?

In September, in Summit, New York, the rain falls for 12.5 days. Throughout September, 2.13" (54mm) of precipitation is accumulated.

What is the driest month in Summit?

The month with the least rainfall in Summit, New York, is September when the rain falls for 12.5 days and typically collects 2.13" (54mm) of precipitation.

Does it snow in Summit in September?

In Summit, New York, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Summit?

In Summit, New York, snow does not fall in June through September.

What is the average length of the day in September in Summit?

In Summit, New York, the average length of the day in September is 12.5h.

How long on average sun shines in September in Summit?

The average sunshine in September in Summit, New York, is 8.7h.

What is the UV index reading in September in Summit?

The average daily maximum UV index in September in Summit, New York, is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in September - Summit, NY
  • Average high temperature in September: 20.6°C

The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-2.9°C).

  • Average low temperature in September: 9.5°C

The month with the highest average low temperature is July (13.9°C).
The coldest month (with the lowest average low temperature) is January (-9.3°C).

Average pressure in September - Summit, NY
  • Average pressure in September: 1017.8mbar

The month with the highest atmospheric pressure is November (1019.1mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).

Average wind speed in September - Summit, NY
  • Average wind speed in September: 9.5km/h

The windiest month (with the highest average wind speed) is January (15.1km/h).
The calmest month (with the lowest average wind speed) is August (9.2km/h).

Average humidity in September - Summit, NY
  • Average humidity in September: 80%

The month with the highest relative humidity is February (86%).
Months with the lowest relative humidity are April and May (78%).

Average rainfall in September - Summit, NY
  • Average rainfall in September: 54mm

The wettest month (with the highest rainfall) is August (85mm).
The driest month (with the least rainfall) is September (54mm).

Average rainfall days in September - Summit, NY
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in September - Summit, NY
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (230mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Summit, NY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (18.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Summit, NY
  • Average daylight in September: 12.5h

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

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 3.1h).

Average sunshine days in September - Summit, NY
  • Average sunshine days in September: 15 days

The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (6.1 days).

Average UV index in September - Summit, NY
  • Average UV index in September: 3

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are February, November and December (UV index 1).

Average cloud cover in September - Summit, NY
  • Average cloud cover in September: 40

The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in September - Summit, NY
  • Average visibility in September: 8km

Months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (8km).
The month with the lowest visibility is February (7km).