Connecticut weather in December 2025

Q: How cold is it in Connecticut in December?

Daytime temperatures usually reach 3°C in Hartford, Connecticut in December, falling to -6°C at night.

Q: How sunny is it in Connecticut in December?

There are normally 5 hours of bright sunshine each day in Hartford, Connecticut in December - that's 49% of daylight hours.

Q: Does it rain in Connecticut in December?

There are usually 12 days with some rain in Hartford, Connecticut in December and the average monthly rainfall is 97mm. Rain may fall as snow in this month.

Expect daytime maximum temperatures of 37°F in Connecticut, USA in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 12 days with some rainfall and typically 3.8 inches of rainfall in the month, which might fall as snow.

37
37°F max day temperature
5
5 hours of sunshine per day
12
12 days with some rainfall
21
21°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
3.8
3.8 inches of monthly rainfall
1
1 (Low) UV index

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The December weather guide for Connecticut (Hartford) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Connecticut destinations

Below are average maximum temperatures at popular countries, regions and places in Connecticut in December. Select a holiday destination to see more weather parameters.

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Metric (°C) | Imperial (°F)

More about the USA

How cold is it in Connecticut in December?

Daytime temperatures usually reach 37°F in Hartford, Connecticut in December, falling to 21°F at night.

How sunny is it in Connecticut in December?

There are normally 5 hours of bright sunshine each day in Hartford, Connecticut in December - that's 49% of daylight hours.

Does it rain in Connecticut in December?

There are usually 12 days with some rain in Hartford, Connecticut in December and the average monthly rainfall is 3.8 inches. Rain may fall as snow in this month.

Connecticut December sunrise & sunset times

Browse the sunrise and sunset times for Connecticut in December 2025. Select a month to view Connecticut sunrise and sunset times for the next 12 months. The Connecticut sunrise and sunset times shown below are for Hartford.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st December 2025	06:59	16:21
Tuesday, 16th December 2025	07:12	16:21
Wednesday, 31st December 2025	07:18	16:30

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Connecticut - quick facts
Flight time^✝	10.5 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Tourist info	Connecticut Office of Tourism