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

Weather in September

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

Temperature

In Ithaca, New York, the average high-temperature marginally drops, from a moderately hot 76.5°F (24.7°C) in August, to an agreeable 70°F (21.1°C). In September, the average low-temperature is 50.7°F (10.4°C).

Humidity

The average relative humidity in Ithaca, New York, is 81%.

Rainfall

In Ithaca, New York, it is raining for 13.6 days, with typically 2.52" (64mm) of accumulated precipitation. In Ithaca, during the entire year, the rain falls for 164.2 days and collects up to 32.56" (827mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

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

Sunshine

In Ithaca, New York, the average sunshine in September is 8.4h.

UV index

In Ithaca, New York, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for 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, 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?

The average relative humidity in September in Ithaca, New York, 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.

Does it snow in Ithaca in September?

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

When it does not snow in Ithaca?

June through September are months without snowfall.

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

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

How long on average sun shines in September in Ithaca?

In September, the average sunshine in Ithaca is 8.4h.

How high is the UV index in September in Ithaca?

In September, the average daily maximum UV index in Ithaca, New York, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

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"

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
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%).
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").
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).
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: 12.5h

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

  • Average sunshine in September: 8.4h

The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 2.5h).

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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).
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).
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

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

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