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Connecticut Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Connecticut, the United States of America in January.

Are you planning a trip a to Connecticut, the United States of America in January and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Connecticut in January

Connecticut, the United States of America is a region in the United States of America. January in Connecticut generally has temperatures that range from very cold to cold, with moderate precipitation. January is a winter month.

Temperatures

During the day the temperature is very cold in Cornwall Bridge at 1°C (34°F) and cold in Old Saybrook at 4°C (39°F). As night falls, temperatures generally drop to -5°C (23°F) in Old Saybrook and -9°C (16°F) in Cornwall Bridge. In numerous regions in the United States of America, January is marked by its cold weather conditions. If you're heading to these areas during this month, it's vital to be well-prepared. Dressing in layered and insulated outfits will ensure you stay warm.

To explore the conditions in Connecticut, the United States of America in more detail, check the map below.

Precipitation

In January, precipitation varies across different areas. From moderate snow/rainfall in Cornwall Bridge with an average of 77 mm (3 in) to moderate snow/rainfall in Niantic with 99 mm (3.9 in).

Average sunshine

Most areas see decent amounts of sunshine this month. Mystic gets around 170 hours of sunlight, providing a pleasant balance of sun and clouds. If you'd prefer more guaranteed sunshine, our weather planner can show you sunnier spots around the world.

Explore Connecticut by month

Pick a month to see the average temperature, rainfall and sunshine in Connecticut — and find the best time to visit. (based on Mystic)

Best Places to Visit in Connecticut in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Connecticut.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Connecticut

What is the weather like in January for some of the most popular destinations in Connecticut, the United States of America?

Temperature range in Connecticut (January)

Precipitation variation in Connecticut (January)

Mystic

In January Mystic generally has low temperatures with maximum daytime temperatures around 4°C (39°F), minimum nighttime temperatures around -5°C (23°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
7°C (45°F)
4°C (39°F)
4°C (39°F)
Min temperature
-1°C (30°F)
-5°C (23°F)
-5°C (23°F)
Monthly sun hours
147 hours
170 hours
173 hours
Monthly snow/rainfall
127 mm (5 in)
96 mm (3.8 in)
97 mm (3.8 in)
Monthly rainy days
12 days
12 days
11 days
Weather conditions

Danbury

In January Danbury generally has low temperatures with maximum daytime temperatures around 2°C (36°F), minimum nighttime temperatures around -8°C (18°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
6°C (43°F)
2°C (36°F)
3°C (37°F)
Min temperature
-3°C (27°F)
-8°C (18°F)
-8°C (18°F)
Monthly snow/rainfall
129 mm (5.1 in)
94 mm (3.7 in)
93 mm (3.7 in)
Monthly rainy days
13 days
13 days
10 days
Weather conditions

Windsor Locks

In January Windsor Locks generally has low temperatures with maximum daytime temperatures around 2°C (36°F), minimum nighttime temperatures around -7°C (19°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
6°C (43°F)
2°C (36°F)
3°C (37°F)
Min temperature
-3°C (27°F)
-7°C (19°F)
-7°C (19°F)
Monthly sun hours
139 hours
169 hours
176 hours
Monthly snow/rainfall
118 mm (4.6 in)
86 mm (3.4 in)
93 mm (3.7 in)
Monthly rainy days
13 days
11 days
10 days
Weather conditions

Groton

In January Groton generally has low temperatures with maximum daytime temperatures around 4°C (39°F), minimum nighttime temperatures around -5°C (23°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
7°C (45°F)
4°C (39°F)
4°C (39°F)
Min temperature
-1°C (30°F)
-5°C (23°F)
-5°C (23°F)
Monthly sun hours
139 hours
169 hours
176 hours
Monthly snow/rainfall
128 mm (5 in)
97 mm (3.8 in)
98 mm (3.9 in)
Monthly rainy days
12 days
11 days
11 days
Weather conditions

Milford

In January Milford generally has low temperatures with maximum daytime temperatures around 4°C (39°F), minimum nighttime temperatures around -5°C (23°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

December
January
February
Max temperature
7°C (45°F)
4°C (39°F)
4°C (39°F)
Min temperature
-1°C (30°F)
-5°C (23°F)
-5°C (23°F)
Monthly sun hours
139 hours
169 hours
176 hours
Monthly snow/rainfall
126 mm (5 in)
86 mm (3.4 in)
96 mm (3.8 in)
Monthly rainy days
12 days
12 days
10 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Connecticut, in the United States of America.

Popular cities in January

Day & night temperatures, rainfall and average weather in Connecticut in January.

City Weather Day temp Night temp Rainfall
Mystic 4°C (39°F) -5°C (23°F) 96 mm (3.8 in)
Danbury 2°C (36°F) -8°C (18°F) 94 mm (3.7 in)
Windsor Locks 2°C (36°F) -7°C (19°F) 86 mm (3.4 in)
Groton 4°C (39°F) -5°C (23°F) 97 mm (3.8 in)
Milford 4°C (39°F) -5°C (23°F) 86 mm (3.4 in)
Norwalk 4°C (39°F) -5°C (23°F) 84 mm (3.3 in)

Connecticut weather in January: frequently asked questions

What is the weather like in Connecticut, the United States of America in January?

Connecticut, the United States of America typically experiences poor weather in January, part of the winter season. Daytime highs in Mystic average around 4°C (39°F), and temperatures drop to about -5°C (23°F) at night.

What is the average temperature in Connecticut, the United States of America in January?

Average temperatures in Connecticut, the United States of America during January range from a nighttime low near -5°C (23°F) to a daytime high around 4°C (39°F) in Mystic.

Does Connecticut, the United States of America get a lot of snow/rain in January?

Not particularly. Mystic averages just 96 mm (3.8 in) of snow/rain in January, making it a mostly dry month for Connecticut, the United States of America.

Is January a Good Time to Visit Connecticut, the United States of America?

In our view, January might not be the best time to travel to Connecticut, the United States of America with often poor weather in Mystic.

Generally speaking, August and September provide perfect weather in Mystic. The weather in January, February, March and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Connecticut.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.