Ithaca
New York, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Ithaca, NY

A stream of water flowing downstream from the Taughannock Waterfall in Ithaka, New York
A stream of water flowing downstream from the Taughannock Waterfall in Ithaka, New York
September, the first month of the autumn, in Ithaca, is still a pleasant month, with average temperature fluctuating between 50.2°F (10.1°C) and 71.8°F (22.1°C).

Temperature

In Ithaca, New York, the average high-temperature slightly decreases, from a moderately hot 79°F (26.1°C) in August, to an agreeable 71.8°F (22.1°C). The average low-temperature, in Ithaca, is 50.2°F (10.1°C).

Rainfall

In September, the rain falls for 11 days. Throughout September, 3.4" (86.6mm) of precipitation is accumulated. Throughout the year, there are 156 rainfall days, and 35.1" (892.3mm) of precipitation is accumulated.

Snowfall

In Ithaca, in September, it doesn't snow. In October, it regularly snows. In Ithaca, New York, during the entire year, snow aggregates up to 64.4" (1635.9mm).

Daylight

The average length of the day in September is 12.5h.

Sunshine

In September, the average sunshine in Ithaca, New York, is 7h.

UV index

In Ithaca, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for the average person.
The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 Ithaca?

The average high-temperature, in September, in Ithaca, New York, is 71.8°F (22.1°C), while the average low-temperature is 50.2°F (10.1°C).

How much does it rain in Ithaca in September?

In Ithaca, in September, it is raining for 11 days, with typically 3.4" (86.6mm) of accumulated precipitation.

Does it snow in Ithaca in September?

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

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

The average length of the day in September is 12.5h.

How long on average sun shines in September in Ithaca?

The average sunshine in September in Ithaca is 7h.

How high is the UV index in September in Ithaca?

In September, the average daily maximum UV index in Ithaca, New York, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Ithaca, NY
  • Average high temperature in September: 71.8°F

The warmest month (with the highest average high temperature) is July (80.9°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in September: 50.1°F

The month with the highest average low temperature is July (58.4°F).
The coldest month (with the lowest average low temperature) is February (15.2°F).

Average rainfall in September - Ithaca, NY
  • Average rainfall in September: 3.4"

Wettest months (with the highest rainfall) are June and July (3.6").
The driest month (with the lowest rainfall) is February (1.9").

Average rainfall days in September - Ithaca, NY
  • Average rainfall days in September: 11 days

Months with the highest number of rainy days are January and December (15 days).
Months with the lowest number of rainy days are August and September (11 days).

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

The month with the highest snowfall is January (15.5").
Months with the lowest snowfall are June, July, August and September (0").

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

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 7h

The month with most sunshine is July (Average sunshine: 10h).
Months with least sunshine are November and December (Average sunshine: 3).

Average UV index in September - Ithaca, NY
  • Average UV index in September: 6

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