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December Weather in Middle Island, United States

Last updated: June 24, 2025

In December, the average temperature in Middle Island, United States hovers around 5°C (40°F). Expect chilly days with minimum temperatures dipping to -10°C (15°F), while the mercury can rise to a pleasant 17°C (62°F). Precipitation is notable, with around 140 mm (5.5 in) over 11 days, contributing to an average humidity of 80%. Make sure to pack accordingly!

December Temperature in Middle Island

In December in Middle Island, the average temperature is 5°C (40°F). Maximums can reach 17°C (62°F), while minimums can drop as low as -10°C (15°F). Be sure to pack layers to stay comfortable during your travels!

December Weather in Middle Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Middle Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Middle Island, December typically has an average temperature of 5°C (40°F), with highs reaching up to 17°C (62°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec353640485868757569614840
Data source: Temperature data for Middle Island 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 Middle Island

In Middle Island in December, the total precipitation amount is 140 mm (5.5 in), occurring over a span of 11 days.

December Precipitation Trends in Middle Island

The chart displays monthly precipitation patterns in Middle Island, 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 Middle Island, December typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec801121041321198713110394143103140
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Middle Island

In Middle Island in December, humidity is 80%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill settling on your skin, making travel uncomfortable and requiring extra layers to stay warm while navigating the cool, misty atmosphere.

December Average Humidity in Middle Island

This chart illustrates the average monthly humidity levels in Middle Island, 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 Middle Island is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Middle Island

In Middle Island in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Middle Island, you can visit Hourly UV Index in Middle Island.

Maximum UV Index Levels in Middle Island for December

The chart shows the monthly maximum UV Index (UVI) for Middle Island 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 Middle Island typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Middle Island 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 Middle Island Compares to Other Months

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

This table compares monthly weather conditions in Middle Island, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)80 mm (3.1 inches)84%moderate
February Weather2°C (36°F)112 mm (4.4 inches)82%moderate
March Weather4°C (40°F)104 mm (4.1 inches)81%high
April Weather9°C (49°F)132 mm (5.2 inches)78%very high
May Weather14°C (58°F)119 mm (4.7 inches)69%very high
June Weather20°C (68°F)87 mm (3.4 inches)69%very high
July Weather24°C (76°F)131 mm (5.2 inches)62%very high
August Weather24°C (75°F)103 mm (4.0 inches)65%very high
September Weather21°C (70°F)94 mm (3.7 inches)68%very high
October Weather16°C (61°F)143 mm (5.6 inches)74%high
November Weather9°C (49°F)103 mm (4.0 inches)82%moderate
December Weather5°C (40°F)140 mm (5.5 inches)80%low

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