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December Weather in Harlem, United States

Last updated: June 24, 2025

In Harlem, United States, the average temperature in December hovers around 20°C (69°F), with a comfortable minimum of 7°C (44°F) and a warm maximum reaching 31°C (88°F). Expect 35 mm (1.4 in) of precipitation spread over roughly 4 days, accompanied by an average humidity level of 84%, providing a lush and vibrant atmosphere.

December Temperature in Harlem

In December in Harlem, the average temperature is 20°C (69°F). The maximum can reach 31°C (88°F), and the minimum can be as low as 7°C (44°F). This pleasant climate makes Harlem an ideal destination for travelers seeking comfortable weather during their visit.

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

The chart illustrates December temperature patterns in Harlem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harlem, December typically has an average temperature of 20°C (69°F), with highs reaching up to 31°C (88°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec667172777982838382807369
Data source: Temperature data for Harlem 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 Harlem

In Harlem in December, the precipitation amount is 35 mm (1.4 in) over a span of 4 days.

December Precipitation Trends in Harlem

The chart displays monthly precipitation patterns in Harlem, 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 Harlem, December typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec333621571462442112622001194335
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Harlem

In Harlem in December humidity is 84%. With an average temperature of 20°C (69°F), this humidity feels like walking through a warm, moist blanket, making travel feel heavy and slightly fatigued as the heat clings to your skin and leaves you yearning for a refreshing breeze.

December Average Humidity in Harlem

This chart illustrates the average monthly humidity levels in Harlem, 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 Harlem is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%68%65%73%77%80%83%83%83%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Harlem

In Harlem in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Harlem.

Maximum UV Index Levels in Harlem for December

The chart shows the monthly maximum UV Index (UVI) for Harlem 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 Harlem typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101212121212111075
Data source: Harlem 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 Harlem Compares to Other Months

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

This table compares monthly weather conditions in Harlem, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (66°F)33 mm (1.3 inches)83%high
February Weather22°C (71°F)36 mm (1.4 inches)80%very high
March Weather22°C (72°F)21 mm (0.8 inches)75%very high
April Weather25°C (77°F)57 mm (2.2 inches)68%extreme
May Weather26°C (80°F)146 mm (5.8 inches)65%extreme
June Weather28°C (82°F)243 mm (9.6 inches)73%extreme
July Weather28°C (83°F)211 mm (8.3 inches)77%extreme
August Weather28°C (83°F)262 mm (10.3 inches)80%extreme
September Weather28°C (83°F)200 mm (7.9 inches)83%extreme
October Weather27°C (80°F)119 mm (4.7 inches)83%very high
November Weather23°C (74°F)43 mm (1.7 inches)83%high
December Weather20°C (69°F)35 mm (1.4 inches)84%moderate

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