Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average sea temperature in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
Groton's progression into October includes a drop in the average high-temperature, from a pleasant 72°F (22.2°C) in September to an enjoyable 61.7°F (16.5°C). Groton, in October, observes a steady average low-temperature of 50.9°F (10.5°C).Humidity
In October, the average relative humidity is 76%.Rainfall
In October, the rain falls for 14.5 days. Throughout October, 3.39" (86mm) of precipitation is accumulated. Throughout the year, there are 159.8 rainfall days, and 33.07" (840mm) of precipitation is accumulated.Snowfall
In Groton, snow does not fall in May through October.Ocean temperature
In Groton, the average seawater temperature in October is 62.8°F (17.1°C).Note: In water of 62.8°F (17.1°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 October, the average length of the day is 11h and 5min.On the first day of the month, sunrise is at 6:45 am and sunset at 6:29 pm. On the last day of October, sunrise is at 7:19 am and sunset at 5:44 pm EDT.
Sunshine
The average sunshine in October is 6.2h.UV index
In October, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In October, the UV index of 3 transforms into the following advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the average humidity in October?
How many days does it rain in October?
When it does not snow?
Does it snow in Groton in October?
How cold is the water in October?
What is the average length of the day in October?
When is the sunrise / sunset in October?
How long on average sun shines in October?
What is the UV index intensity in October in Groton?
Average temperature in October
Groton, CT
- Average high temperature in October: 61.7°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in October: 50.9°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in October
Groton, CT
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in October
Groton, CT
- Average wind speed in October: 10.4mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in October
Groton, CT
- Average humidity in October: 76%
The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in October
Groton, CT
- Average rainfall in October: 3.39"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in October
Groton, CT
- Average rainfall days in October: 14.5 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in October
Groton, CT
- Average snowfall in October: 0"
The month with the highest snowfall is March (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in October
Groton, CT
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in October
Groton, CT
- Average sea temperature in October: 62.8°F
The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).
Average daylight in October /
Average sunshine in October
Groton, 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 12min).
- Average sunshine in October: 6h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in October
Groton, CT
- Average sunshine days in October: 14.5 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (12.5 days).
Average UV index in October
Groton, 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
Groton, CT
- Average cloud cover in October: 40
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in October
Groton, 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).
Groton, Connecticut, USA
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