Groton Weather in December
Groton in December sees low daytime temperatures of 7°C (45°F) and nighttime lows of -1°C (30°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.
Rainfall in Groton in December
An umbrella might come in handy since it is the wettest month of the year. Based on our climate data of the past 30 years, about 12 days of snow/rain are anticipated, with 128 mm (5 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Groton in December
If you're visiting Groton in December, expect highs of 7°C (45°F) and overnight lows around -1°C (30°F). December marks the winter season. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. With lows of -1°C (30°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated.
Sunshine in Groton in December
The area experiences a moderate amount of sunshine, with approximately 139 hours of sunlight expected. This means a decent mix of sun and overcast.December in Groton has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Groton's climate page.
Groton Temperature in December
Min Temperature
-1°C (30°F)
Max Temperature
7°C (45°F)
Chance of Rain
40%
Precipitation
128 mm (5 in)
Rainy days
12 days
Humidity
68% *
Sunshine
139 hours *
Percentage Sunshine
49% *
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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What to Wear in Groton in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Groton in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Groton's climate page.
Temperature Rainfall Sunshine Humidity
See the full Groton climate overview or explore weather in the United States of America.
