October weather forecast
Greenwich, CT

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The straight road of North Street cutting through the green leafy suburbs of the scenic Greenwich City in Connecticut
The straight road of North Street cutting through the green leafy suburbs of the scenic Greenwich City in Connecticut

Weather in October

October brings a definitive autumn feel to Greenwich. The cityscape adorned with fall colors presents a picturesque view. With the temperature ranging from 51.8°F (11°C) to 62.4°F (16.9°C), it's the perfect time for outdoor exploits. The declining daylight invokes a sense of calm, making the city an epitome of autumn tranquility. Despite lower temperatures, October records higher rainfall with an average of 3.46" (88mm).

Temperature

Stepping into October, Greenwich observes a temperature decline, with the average high falling from September's warm 73.4°F (23°C) to a refreshing 62.4°F (16.9°C). October in Greenwich is noted for a mean low-temperature of 51.8°F (11°C).

Humidity

In October, the average relative humidity in Greenwich is 74%.

Rainfall

In Greenwich, during October, the rain falls for 13.8 days and regularly aggregates up to 3.46" (88mm) of precipitation. In Greenwich, during the entire year, the rain falls for 165.6 days and collects up to 37.64" (956mm) of precipitation.

Snowfall

In Greenwich, snow does not fall in May through October.

Ocean temperature

In October, the average ocean temperature is 62.2°F (16.8°C).
Note: In water with a temperature of 62.2°F (16.8°C), most individuals do not find swimming enjoyable. As the temperature falls from 69.8°F (21°C) to 59°F (15°C), breathing control becomes more difficult.

Daylight

The average length of the day in October is 11h and 6min.
On the first day of October, sunrise is at 6:51 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:51 pm EDT.

Sunshine

In October, the average sunshine is 5.8h.

UV index

The average daily maximum UV index in October in Greenwich is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 3 during October translates into the following guidance:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the average October temperature in Greenwich?

In Greenwich, 62.4°F (16.9°C) is the average high-temperature and 51.8°F (11°C) is the average low-temperature during October. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is appraised at 84.2°F (29°C).

What is the average humidity in October in Greenwich?

In October, the average relative humidity in Greenwich, Connecticut, is 74%.

How many days does it rain in October in Greenwich?

In Greenwich, in October, during 13.8 rainfall days, 3.46" (88mm) of precipitation is typically accumulated.

When it does not snow in Greenwich?

In Greenwich, Connecticut, snow does not fall in May through October.

Does it snow in Greenwich in October?

In Greenwich, in October, it doesn't snow. In November, it regularly snows.

What is the ocean temperature in October in Greenwich?

In Greenwich, Connecticut, in October, the average water temperature is 62.2°F (16.8°C). Swimming in 62.2°F (16.8°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 Greenwich have in October?

In Greenwich, the average day length in October is 11h and 6min.

What time are sunrise and sunset in October in Greenwich?

On the first day of October, sunrise is at 6:51 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:51 pm EDT.

How long on average sun shines in October in Greenwich?

In October, the average sunshine duration is 5.8h.

What is the UV index reading in October in Greenwich?

In October, the average daily maximum UV index in Greenwich, Connecticut, is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to 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
Greenwich, CT

Average temperature in October - Greenwich, CT
  • Average high temperature in October: 62.4°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in October: 51.8°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in October
Greenwich, CT

Average pressure in October - Greenwich, CT
  • Average pressure in October: 30.02"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 October
Greenwich, CT

Average wind speed in October - Greenwich, CT
  • Average wind speed in October: 8.8mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in October
Greenwich, CT

Average humidity in October - Greenwich, CT
  • Average humidity in October: 74%

The months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).

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Average rainfall in October
Greenwich, CT

Average rainfall in October - Greenwich, CT
  • Average rainfall in October: 3.46"

The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").

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Average rainfall days in October
Greenwich, CT

Average rainfall days in October - Greenwich, CT
  • Average rainfall days in October: 13.8 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in October
Greenwich, CT

Average snowfall in October - Greenwich, CT
  • Average snowfall in October: 0"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in October
Greenwich, CT

Average snowfall days in October - Greenwich, CT
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in October
Greenwich, CT

Average sea temperature in October - Greenwich, CT
  • Average sea temperature in October: 62.2°F

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

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Average daylight in October /
Average sunshine in October
Greenwich, CT

Average daylight in October / Average sunshine in October - Greenwich, CT
  • 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in October
Greenwich, CT

Average sunshine days in October - Greenwich, CT
  • Average sunshine days in October: 15 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).

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Average UV index in October
Greenwich, CT

Average UV index in October - Greenwich, CT
  • Average UV index in October: 3

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
Greenwich, CT

Average cloud cover in October - Greenwich, CT
  • Average cloud cover in October: 42

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in October
Greenwich, CT

Average visibility in October - Greenwich, CT
  • 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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Greenwich, Connecticut, USA

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