October weather forecastGreenwich, CT
October
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in October /
Average sunshine in October
Greenwich, CT
- Average daylight in October: 11h and 6min
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 48min
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).
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).
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).
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).
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).
