Groton Weather in January
January in Groton brings low temperatures, with highs of 4°C (39°F) and nights dropping to -5°C (23°F). Rainfall is on the higher side this month, averaging around 97 mm (3.8 in), so keep a rain jacket handy.
Rainfall in Groton in January
You can expect snow/rain on around 11 days based on historical patterns, with 97 mm (3.8 in) average for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Groton in January
Temperatures in Groton in January top out at 4°C (39°F) and drop to -5°C (23°F) overnight. Winter occurs in January. Expect a distinctly cold feel throughout the day, not just overnight. Nights are well below freezing at -5°C (23°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. This month is known for being the coldest, so make sure you pack appropriately with plenty of warm clothing.
Sunshine in Groton in January
The month brings about 169 hours of sunlight, offering a comfortable mix of sun and overcast.January in Groton has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options 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 January
Min Temperature
-5°C (23°F)
Max Temperature
4°C (39°F)
Chance of Rain
37%
Precipitation
97 mm (3.8 in)
Rainy days
11 days
Humidity
64% *
Sunshine
169 hours *
Percentage Sunshine
58% *
Best Places in the United States of America in January
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 January →
perfect weather
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What to Wear in Groton in January
Cold weather calls for smart layering in January. 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Groton in January
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.
