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December Weather in Hamden, United States

Last updated: June 24, 2025

In December, the average temperature in Hamden, United States hovers around 4°C (39°F), with a minimum dipping as low as -14°C (7°F) and a potential maximum reaching 19°C (67°F). Expect about 116 mm (4.6 in) of precipitation over 11 days, contributing to the high average humidity of 87%. Stay prepared for a mix of chilly and damp days!

December Temperature in Hamden

In December in Hamden, the average temperature is 4°C (39°F), with maximums reaching up to 19°C (67°F) and minimums plunging as low as -14°C (7°F). Be prepared for a wide temperature range if you're planning to travel during this time.

December Weather in Hamden: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Hamden, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamden, December typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (67°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546572777570594438
Data source: Temperature data for Hamden generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Hamden

In Hamden in December, the precipitation amount is 116 mm (4.6 in) over the course of 11 days.

December Precipitation Trends in Hamden

The chart displays monthly precipitation patterns in Hamden, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Hamden, December typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec861221211351331421121139910986116
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hamden

In Hamden in December, humidity is 87%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and gritty, as the air hangs heavy and clings to your skin.

December Average Humidity in Hamden

This chart illustrates the average monthly humidity levels in Hamden, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Hamden is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hamden

In Hamden in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Hamden, you can check the information here.

Maximum UV Index Levels in Hamden for December

The chart shows the monthly maximum UV Index (UVI) for Hamden in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Hamden typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Hamden December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Hamden Compares to Other Months

Weather in Hamden varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hamden, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Hamden, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)86 mm (3.4 inches)88%moderate
February Weather3°C (38°F)122 mm (4.8 inches)88%moderate
March Weather7°C (45°F)120 mm (4.7 inches)87%high
April Weather12°C (54°F)135 mm (5.3 inches)85%very high
May Weather18°C (65°F)133 mm (5.2 inches)81%very high
June Weather22°C (72°F)142 mm (5.6 inches)82%very high
July Weather25°C (77°F)112 mm (4.4 inches)81%very high
August Weather24°C (75°F)113 mm (4.4 inches)73%very high
September Weather21°C (70°F)99 mm (3.9 inches)73%very high
October Weather15°C (59°F)109 mm (4.3 inches)78%high
November Weather7°C (44°F)86 mm (3.4 inches)89%moderate
December Weather4°C (39°F)116 mm (4.6 inches)87%moderate

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