September weather forecast
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

Weather in September

The first month of the autumn, September, is also an agreeable month in Ithaca, New York, with an average temperature ranging between max 70°F (21.1°C) and min 50.7°F (10.4°C).

Temperature

In September, the average high-temperature slightly decreases from a warm 76.5°F (24.7°C) in August to an agreeable 70°F (21.1°C). In September, in Ithaca, the average low-temperature is 50.7°F (10.4°C).

Humidity

In Ithaca, the average relative humidity in September is 81%.

Rainfall

In September, in Ithaca, the rain falls for 13.6 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Ithaca, there are 164.2 rainfall days, and 32.56" (827mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Ithaca, New York.

Daylight

In Ithaca, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:50 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Ithaca?

In Ithaca, New York, in September, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 50.7°F (10.4°C).

What is the average humidity in September in Ithaca?

In Ithaca, New York, the average relative humidity in September is 81%.

How much does it rain in Ithaca in September?

In Ithaca, during September, the rain falls for 13.6 days and regularly aggregates up to 2.52" (64mm) of precipitation.

When it does not snow in Ithaca?

June through September are months without snowfall.

Does it snow in Ithaca in September?

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

How many hours of daylight does Ithaca have in September?

In September, the average day length in Ithaca, New York, is 12h and 28min.

What time are sunrise and sunset in September in Ithaca?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:50 pm EDT.

How many hours of sunshine does Ithaca have in September?

The average sunshine duration in September is 8.4h.

What is the UV index reading in September in Ithaca?

In September, the average daily maximum UV index in Ithaca, New York, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Ithaca, NY

Average temperature in September - Ithaca, NY
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in September: 50.7°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 (16.5°F).

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Average pressure in September
Ithaca, NY

Average pressure in September - Ithaca, NY
  • Average pressure in September: 30.06"Hg

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

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Average wind speed in September
Ithaca, NY

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

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

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Average humidity in September
Ithaca, NY

Average humidity in September - Ithaca, NY
  • Average humidity in September: 81%

The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April and May (79%).

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Average rainfall in September
Ithaca, NY

Average rainfall in September - Ithaca, NY
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is November (1.97").

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Average rainfall days in September
Ithaca, NY

Average rainfall days in September - Ithaca, NY
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (6.4 days).

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Average snowfall in September
Ithaca, NY

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

The month with the highest snowfall is February (8.35").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Ithaca, NY

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

The month with the highest number of snowfall days is January (18.8 days).
The 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
Ithaca, NY

Average daylight in September / Average sunshine in September - Ithaca, NY
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in September: 8h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).

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Average sunshine days in September
Ithaca, NY

Average sunshine days in September - Ithaca, NY
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is September (14.2 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in September
Ithaca, NY

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

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

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Average cloud cover in September
Ithaca, NY

Average cloud cover in September - Ithaca, NY
  • Average cloud cover in September: 41

The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 38).

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Average visibility in September
Ithaca, NY

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

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).

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