October weather forecast
Stony Brook, NY

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Weather in October

October, the same as September, is another refreshing autumn month in Stony Brook, New York, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 62.6°F (17°C).

Temperature

October involves a decrease in temperature, down from a pleasant 72.3°F (22.4°C) in September to a refreshing 62.6°F (17°C). Night temperatures during October in Stony Brook stabilize at an average of 55.4°F (13°C), closely mirroring the daytime temperatures.

Humidity

In Stony Brook, the average relative humidity in October is 72%.

Rainfall

In Stony Brook, in October, it is raining for 13.1 days, with typically 3.27" (83mm) of accumulated precipitation. In Stony Brook, during the entire year, the rain falls for 146.8 days and collects up to 33.78" (858mm) of precipitation.

Snowfall

Months with snowfall in Stony Brook are January through March, October through December. October is the first month it typically snows in Stony Brook, New York. Throughout October, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 12.6 snowfall days, and 5.59" (142mm) of snow is accumulated.

Ocean temperature

In October, the average ocean temperature in Stony Brook is 63.7°F (17.6°C).
Note: In water of 63.7°F (17.6°C), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Stony Brook, the average length of the day in October is 11h and 6min.
On the first day of the month, sunrise is at 6:49 am and sunset at 6:34 pm. On the last day of October, in Stony Brook, sunrise is at 7:22 am and sunset at 5:49 pm EDT.

Sunshine

In Stony Brook, the average sunshine in October is 5.9h.

UV index

In October, the average daily maximum UV index in Stony Brook is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 4 in October suggests the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What are October temperatures in Stony Brook?

The high-temperature, in October, in Stony Brook, is 62.6°F (17°C), while the low-temperature averages to 55.4°F (13°C).

What is the average humidity in October in Stony Brook?

The average relative humidity in October in Stony Brook is 72%.

How much does it rain in Stony Brook in October?

In Stony Brook, in October, it is raining for 13.1 days, with typically 3.27" (83mm) of accumulated precipitation.

When does it start snowing in Stony Brook?

October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow.

What is the ocean temperature in October in Stony Brook?

In Stony Brook, the average seawater temperature in October is 63.7°F (17.6°C). Swimming in 63.7°F (17.6°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Stony Brook have in October?

In October, the average day length in Stony Brook, New York, is 11h and 6min.

What time are sunrise and sunset in October in Stony Brook?

On the first day of October, sunrise is at 6:49 am and sunset at 6:34 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:49 pm EDT.

How long on average sun shines in October in Stony Brook?

The average sunshine duration in October is 5.9h.

How high is the UV index in October in Stony Brook?

In October, the average daily maximum UV index in Stony Brook is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Stony Brook, NY

Average temperature in October - Stony Brook, NY
  • Average high temperature in October: 62.6°F

The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in October: 55.4°F

The months with the highest average low temperature are July and August (71.1°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

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Average pressure in October
Stony Brook, NY

Average pressure in October - Stony Brook, NY
  • Average pressure in October: 30.01"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in October
Stony Brook, NY

Average wind speed in October - Stony Brook, NY
  • Average wind speed in October: 11.7mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).

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Average humidity in October
Stony Brook, NY

Average humidity in October - Stony Brook, NY
  • Average humidity in October: 72%

The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in October
Stony Brook, NY

Average rainfall in October - Stony Brook, NY
  • Average rainfall in October: 3.27"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (2.05").

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Average rainfall days in October
Stony Brook, NY

Average rainfall days in October - Stony Brook, NY
  • Average rainfall days in October: 13.1 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in October
Stony Brook, NY

Average snowfall in October - Stony Brook, NY
  • Average snowfall in October: 0.2"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, May, June, July, August and September (0").

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Average snowfall days in October
Stony Brook, NY

Average snowfall days in October - Stony Brook, NY
  • Average snowfall days in October: 0.1 days

The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in October
Stony Brook, NY

Average sea temperature in October - Stony Brook, NY
  • Average sea temperature in October: 63.7°F

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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Average daylight in October /
Average sunshine in October
Stony Brook, NY

Average daylight in October / Average sunshine in October - Stony Brook, NY
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in October: 5h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in October
Stony Brook, NY

Average sunshine days in October - Stony Brook, NY
  • Average sunshine days in October: 17 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (13 days).

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Average UV index in October
Stony Brook, NY

Average UV index in October - Stony Brook, NY
  • Average UV index in October: 4

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in October
Stony Brook, NY

Average cloud cover in October - Stony Brook, NY
  • Average cloud cover in October: 41

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in October
Stony Brook, NY

Average visibility in October - Stony Brook, NY
  • Average visibility in October: 6mi

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

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Stony Brook, New York, USA

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