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December Weather in Middletown, United States

Last updated: June 24, 2025

In December, the average temperature in Middletown, United States hovers around 4°C (39°F). Expect chilly conditions, with the minimum dipping to -12°C (11°F) and the maximum reaching a mild 19°C (66°F). Be prepared for some rain; precipitation totals about 94 mm (3.7 in) over 9 days. With an average humidity of 85%, it’s advisable to dress in layers and keep an umbrella handy!

December Temperature in Middletown

In December in Middletown, the average temperature is 4°C (39°F). Maximum temperatures can reach 19°C (66°F), while minimums can drop as low as -12°C (11°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Middletown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Middletown, December typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (66°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec353944556473797670604538
Data source: Temperature data for Middletown 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 Middletown

In Middletown in December, the precipitation amount reaches 94 mm (3.7 in) over the course of 9 days.

December Precipitation Trends in Middletown

The chart displays monthly precipitation patterns in Middletown, 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 Middletown, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec619590100134111138114107998894
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Middletown

In Middletown in December, humidity is 85%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to ward off the cold and moisture.

December Average Humidity in Middletown

This chart illustrates the average monthly humidity levels in Middletown, 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 Middletown is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Middletown

In Middletown 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 Middletown, you can check the information here.

Maximum UV Index Levels in Middletown for December

The chart shows the monthly maximum UV Index (UVI) for Middletown 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 Middletown typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Middletown 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 Middletown Compares to Other Months

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

This table compares monthly weather conditions in Middletown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)61 mm (2.4 inches)86%moderate
February Weather4°C (39°F)95 mm (3.7 inches)86%moderate
March Weather7°C (44°F)90 mm (3.6 inches)86%high
April Weather13°C (55°F)100 mm (3.9 inches)84%very high
May Weather18°C (65°F)134 mm (5.3 inches)78%very high
June Weather23°C (73°F)111 mm (4.4 inches)79%very high
July Weather26°C (79°F)138 mm (5.4 inches)70%very high
August Weather24°C (76°F)114 mm (4.5 inches)59%very high
September Weather21°C (70°F)107 mm (4.2 inches)68%very high
October Weather16°C (60°F)99 mm (3.9 inches)80%high
November Weather7°C (45°F)88 mm (3.5 inches)86%moderate
December Weather4°C (39°F)94 mm (3.7 inches)85%moderate

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