Hartford weather in December 2025

Expect daytime maximum temperatures of 3°C in Hartford 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 97 mm of rainfall in the month, which might fall as snow.

  • 3°C maximum daytime temperature in December in Hartford3
    3°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in December in Hartford12
    12 days with some rainfall
  • -6°C minimum night-time temperature in December in Hartford-6
    -6°C min night temperature
  • 9 hours of daylight per day in December in Hartford9
    9 hours of daylight per day
  • No heat & humidity in December in Hartford0
    No heat & humidity
  • 97 mm monthly rainfall in December in Hartford97
    97 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Hartford1
    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.

Metric (°C / mm)  |  Imperial (°F / inches)

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How cold is it in Hartford in December?

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

How sunny is it in Hartford in December?

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

Does it rain in Hartford in December?

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

Hartford December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

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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