September weather forecast and climate
Cortland, NY

A monument from the civil war stands high in the neat lawns near the iconic courthouse in the Courthouse Park in Cortland, New York
A monument from the civil war stands high in the neat lawns near the iconic courthouse in the Courthouse Park in Cortland, New York

Weather in September

September, the first month of the autumn, in Cortland, is still a pleasant month, with average temperature ranging between max 69.1°F (20.6°C) and min 50.5°F (10.3°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 75.4°F (24.1°C) in August, to a pleasant 69.1°F (20.6°C). In Cortland, the average low-temperature is 50.5°F (10.3°C).

Humidity

In Cortland, the average relative humidity is 82%.

Rainfall

In September, the rain falls for 12.9 days. Throughout September, 1.54" (39mm) of precipitation is accumulated. In Cortland, New York, during the entire year, the rain falls for 149.8 days and collects up to 22.36" (568mm) of precipitation.

Snowfall

In Cortland snow does not fall in June through September.

Daylight

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

Sunshine

In September, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in Cortland is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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.
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FAQ

What is the temperature in September in Cortland?

The average high-temperature, in September, in Cortland, New York, is 69.1°F (20.6°C), while the average low-temperature is 50.5°F (10.3°C).

What is the average humidity in September in Cortland?

In September, the average relative humidity in Cortland, New York, is 82%.

How many days does it rain in September in Cortland?

In Cortland, New York, in September, during 12.9 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

Does it snow in Cortland in September?

In Cortland, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Cortland?

In Cortland snow does not fall in June through September.

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

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

How long on average sun shines in September in Cortland?

In Cortland, New York, the average sunshine in September is 8.6h.

What is the UV index intensity in September in Cortland?

In Cortland, New York, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Cortland, NY

Average temperature in September - Cortland, NY
  • Average high temperature in September: 69.1°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 50.5°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

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Average pressure in September
Cortland, NY

Average pressure in September - Cortland, NY
  • Average pressure in September: 30.06"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Cortland, NY

Average wind speed in September - Cortland, NY
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

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Average humidity in September
Cortland, NY

Average humidity in September - Cortland, NY
  • Average humidity in September: 82%

Months with the highest relative humidity are January and February (88%).
Months with the lowest relative humidity are April and May (80%).

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Average rainfall in September
Cortland, NY

Average rainfall in September - Cortland, NY
  • Average rainfall in September: 1.54"

The wettest months (with the highest rainfall) are May and July (2.48").
The driest month (with the least rainfall) is November (1.34").

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Average rainfall days in September
Cortland, NY

Average rainfall days in September - Cortland, NY
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in September
Cortland, NY

Average snowfall in September - Cortland, NY
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.75").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Cortland, NY

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

The month with the highest number of snowfall days is January (18.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Cortland, NY

Average daylight in September / Average sunshine in September - Cortland, 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: 8.6h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 2.4h).

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Average sunshine days in September
Cortland, NY

Average sunshine days in September - Cortland, NY
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is February (7.7 days).

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Average UV index in September
Cortland, NY

Average UV index in September - Cortland, 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 January, February and December (UV index 1).

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Average cloud cover in September
Cortland, NY

Average cloud cover in September - Cortland, NY
  • Average cloud cover in September: 39

Months with the most cloud cover are January and February (Cloud cover 74).
Months with the least cloud cover are July and August (Cloud cover 36).

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Average visibility in September
Cortland, NY

Average visibility in September - Cortland, NY
  • Average visibility in September: 5mi

The month with the highest visibility is April (6mi).
The month with the lowest visibility is February (4mi).

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