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 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 experiences a temperature shift at the start of October, with average high-temperatures adjusting from an agreeable 72.7°F (22.6°C) in September to a mild 59.9°F (15.5°C). Groton records a steady low-temperature average of 44.6°F (7°C) during October.Humidity
In October, the average relative humidity in Groton is 78%.Rainfall
In Groton, during October, the rain falls for 13.5 days and regularly aggregates up to 2.76" (70mm) of precipitation. Throughout the year, in Groton, there are 142.2 rainfall days, and 26.97" (685mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Groton. October is the first month it typically snows. Throughout October, in the average 0.3 snowfall days, it receives 0.24" (6mm) of snow. In Groton, during the entire year, snow falls for 32.6 days and aggregates up to 22.99" (584mm) of snow.Daylight
In October, the average length of the day is 11h and 2min.On the first day of the month, sunrise is at 6:44 am and sunset at 6:27 pm. On the last day of October, sunrise is at 7:19 am and sunset at 5:40 pm EDT.
Sunshine
In Groton, the average sunshine in October is 5.9h.UV index
The average daily maximum UV index in October in Groton is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 3 in October transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
What are the temperatures in Groton in October?
What is the average humidity in October in Groton?
How many days does it rain in October in Groton?
When does it start snowing in Groton?
What is the average length of the day in October in Groton?
When is the sunrise / sunset in October in Groton?
How many hours of sunshine does Groton have in October?
What is the UV index intensity in October in Groton?
Average temperature in October
Groton, MA
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in October: 44.6°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in October
Groton, MA
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Groton, MA
- Average wind speed in October: 6.9mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in October
Groton, MA
- Average humidity in October: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).
Average rainfall in October
Groton, MA
- Average rainfall in October: 2.76"
The wettest month (with the highest rainfall) is December (2.8").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in October
Groton, MA
- Average rainfall days in October: 13.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in October
Groton, MA
- Average snowfall in October: 0.24"
The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Groton, MA
- Average snowfall days in October: 0.3 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Groton, MA
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in October: 5h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in October
Groton, MA
- Average sunshine days in October: 15.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in October
Groton, MA
- 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, MA
- Average cloud cover in October: 45
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in October
Groton, MA
- Average visibility in October: 6mi
The months with the highest visibility are April, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August and September (5mi).
Groton, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
