September weather forecast and climate
Oswego, NY

The colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers
The colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers

Weather in September

September, the first month of the autumn, in Oswego, is also an agreeable month, with average temperature ranging between min 59.9°F (15.5°C) and max 68.9°F (20.5°C).

Temperature

In Oswego, the average high-temperature in September is essentially the same as in August - an agreeable 68.9°F (20.5°C). In September, the average low-temperature is 59.9°F (15.5°C).

Humidity

Months with the lowest humidity in Oswego are September and November, with an average relative humidity of 75%.

Rainfall

In September, in Oswego, New York, the rain falls for 14.8 days. Throughout September, 2.72" (69mm) of precipitation is accumulated. In Oswego, during the entire year, the rain falls for 163 days and collects up to 37.83" (961mm) of precipitation.

Snowfall

In Oswego snow does not fall in May through September.

Ocean temperature

In Oswego, New York, the average water temperature is 68.5°F (20.3°C).
Note: Swimming in 68.5°F (20.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

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

Sunshine

The average sunshine in Oswego is 9.3h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Oswego?

The average high-temperature, in September, is 68.9°F (20.5°C), while the average low-temperature is 59.9°F (15.5°C).

What is the least humid month in Oswego?

September and November, with an average relative humidity of 75%, are the least humid months in Oswego.

What is the average humidity in September in Oswego?

In September, the average relative humidity is 75%.

How many days does it rain in September in Oswego?

In Oswego, in September, it is raining for 14.8 days, with typically 2.72" (69mm) of accumulated precipitation.

Does it snow in Oswego in September?

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

When it does not snow in Oswego?

May through September are months without snowfall.

What is the ocean temperature in September in Oswego?

In September, the average ocean temperature in Oswego is 68.5°F (20.3°C). For most, swimming in 68.5°F (20.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

How many hours of daylight does Oswego have in September?

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

How many hours of sunshine does Oswego have in September?

In Oswego, New York, the average sunshine in September is 9.3h.

What is the UV index reading in September in Oswego?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Oswego, NY

Average temperature in September - Oswego, NY
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in September: 59.9°F

Months with the highest average low temperature are July and August (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).

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Average pressure in September
Oswego, NY

Average pressure in September - Oswego, NY
  • Average pressure in September: 30.05"

The month with the highest atmospheric pressure is November (30.08").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in September
Oswego, NY

Average wind speed in September - Oswego, NY
  • Average wind speed in September: 10.4mph

The windiest month (with the highest average wind speed) is January (15mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

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Average humidity in September
Oswego, NY

Average humidity in September - Oswego, NY
  • Average humidity in September: 75%

The month with the highest relative humidity is June (83%).
Months with the lowest relative humidity are September and November (75%).

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Average rainfall in September
Oswego, NY

Average rainfall in September - Oswego, NY
  • Average rainfall in September: 2.72"

The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (2.2").

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Average rainfall days in September
Oswego, NY

Average rainfall days in September - Oswego, NY
  • Average rainfall days in September: 14.8 days

The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (6 days).

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Average snowfall in September
Oswego, NY

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

The month with the highest snowfall is February (3.94").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Oswego, NY

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

The month with the highest number of snowfall days is February (11.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Oswego, NY

Average sea temperature in September - Oswego, NY
  • Average sea temperature in September: 68.5°F

The best month for swimming (with the highest average sea temperature) is August (73.2°F).
The coldest month (with the lowest average sea temperature) is March (35.4°F).

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

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

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in September: 9.3h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is January (Average sunshine: 2.3h).

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Average sunshine days in September
Oswego, NY

Average sunshine days in September - Oswego, NY
  • Average sunshine days in September: 13.7 days

The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is December (8.5 days).

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Average UV index in September
Oswego, NY

Average UV index in September - Oswego, 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 and December (UV index 1).

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Average cloud cover in September
Oswego, NY

Average cloud cover in September - Oswego, NY
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 79).
Months with the least cloud cover are July and August (Cloud cover 29).

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Average visibility in September
Oswego, NY

Average visibility in September - Oswego, NY
  • Average visibility in September: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January and February (5mi).

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