nomadseason

December Weather in Harper, United States

Last updated: June 24, 2025

In December, the average temperature in Harper, United States hovers around 11°C (53°F). Temperatures can vary significantly, with minimums dipping to -4°C (26°F) and maximums reaching up to 29°C (84°F). Expect 34 mm (1.3 in) of precipitation spread over approximately 4 days, contributing to a high average humidity of 87%.

December Temperature in Harper

In December in Harper, the average temperature is 11°C (53°F), with maximums reaching 29°C (84°F) and minimums dropping to as low as -4°C (26°F). It's advisable to pack layers to accommodate the fluctuating temperatures during your travels.

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

The chart illustrates December temperature patterns in Harper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harper, December typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (84°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec495161667479828277685752
Data source: Temperature data for Harper generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Harper

In Harper in December, the precipitation amount is 34 mm (1.3 in) over a span of 4 days.

December Precipitation Trends in Harper

The chart displays monthly precipitation patterns in Harper, 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 Harper, December typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec3946618014354434795762534
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Harper

In Harper in December, humidity is 87%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that clings to your skin, making it uncomfortable for traveling as it combines the cool air with a sense of heaviness, leaving you yearning for warmth and dryness.

December Average Humidity in Harper

This chart illustrates the average monthly humidity levels in Harper, 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 Harper is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Harper

In Harper 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 Harper.

Maximum UV Index Levels in Harper for December

The chart shows the monthly maximum UV Index (UVI) for Harper 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 Harper typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121211965
Data source: Harper 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 Harper Compares to Other Months

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

This table compares monthly weather conditions in Harper, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)39 mm (1.5 inches)78%moderate
February Weather11°C (52°F)46 mm (1.8 inches)78%very high
March Weather16°C (61°F)61 mm (2.4 inches)77%very high
April Weather19°C (66°F)80 mm (3.2 inches)78%extreme
May Weather23°C (74°F)143 mm (5.6 inches)82%extreme
June Weather26°C (79°F)54 mm (2.1 inches)78%extreme
July Weather28°C (82°F)43 mm (1.7 inches)69%extreme
August Weather28°C (82°F)47 mm (1.9 inches)63%extreme
September Weather25°C (77°F)95 mm (3.8 inches)66%extreme
October Weather20°C (68°F)76 mm (3.0 inches)73%very high
November Weather14°C (58°F)25 mm (1.0 inches)84%high
December Weather11°C (53°F)34 mm (1.3 inches)87%moderate

Compare Harper's Climate with Cities Worldwide