September weather forecast and climate
Swormville, NY

The first month of the autumn, September, is also an agreeable month in Swormville, New York, with average temperature fluctuating between 55°F (12.8°C) and 71.8°F (22.1°C).

Temperature

In Swormville, the average high-temperature slightly decreases, from a warm 78.1°F (25.6°C) in August, to a pleasant 71.8°F (22.1°C). In Swormville, in September, the average low-temperature is 55°F (12.8°C).

Humidity

The average relative humidity in Swormville is 76%.

Rainfall

The month with the least rainfall in Swormville is September when the rain falls for 11.3 days and typically collects 0.91" (23mm) of precipitation.

Snowfall

In Swormville snow does not fall in June through September.

Daylight

In Swormville, the average length of the day in September is 12.5h.

Sunshine

The average sunshine in September is 9h.

UV index

The average daily maximum UV index in Swormville is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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 Swormville?

In Swormville, New York, in September, the average high-temperature is 71.8°F (22.1°C), and the average low-temperature is 55°F (12.8°C).

What is the average humidity in September in Swormville?

The average relative humidity in September is 76%.

How many days does it rain in September in Swormville?

In Swormville, New York, in September, during 11.3 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

What is the driest month in Swormville?

September is the month with the least rainfall in Swormville. Rain falls for 11.3 days and accumulates 0.91" (23mm) of precipitation.

Does it snow in Swormville in September?

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

When it does not snow in Swormville?

June through September are months without snowfall in Swormville.

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

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

How many hours of sunshine does Swormville have in September?

The average sunshine in September is 9h.

What is the UV index reading in September in Swormville?

In September, the average daily maximum UV index in Swormville, New York, is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Swormville, NY
  • Average high temperature in September: 22.1°C

The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (-1.5°C).

  • Average low temperature in September: 12.8°C

The month with the highest average low temperature is July (16.8°C).
The coldest month (with the lowest average low temperature) is January (-7.4°C).

Average pressure in September - Swormville, NY
  • Average pressure in September: 1017.4mbar

The month with the highest atmospheric pressure is November (1018.8mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in September - Swormville, NY
  • Average wind speed in September: 11.1km/h

The windiest month (with the highest average wind speed) is January (17.2km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).

Average humidity in September - Swormville, NY
  • Average humidity in September: 76%

Months with the highest relative humidity are January and February (86%).
Months with the lowest relative humidity are July and August (75%).

Average rainfall in September - Swormville, NY
  • Average rainfall in September: 23mm

The wettest month (with the highest rainfall) is July (41mm).
The driest month (with the least rainfall) is September (23mm).

Average rainfall days in September - Swormville, NY
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (6.4 days).

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

Months with the highest snowfall are January and February (75mm).
Months with the least snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is January (15.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Swormville, 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: 9h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 2.4h).

Average sunshine days in September - Swormville, NY
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.2 days).

Average UV index in September - Swormville, NY
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February and December (UV index 1).

Average cloud cover in September - Swormville, NY
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September - Swormville, NY
  • Average visibility in September: 9km

Months with the highest visibility are April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February and March (8km).