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December Weather in Harlowton, United States

Last updated: June 24, 2025

In Harlowton, United States during the month of December, the average temperature hovers around -3°C (27°F). However, temperatures can range from a chilly -26°C (-15°F) to a mild 17°C (63°F). Expect some moisture, with 25 mm (1.0 in) of precipitation spread over 7 days, all while maintaining a high humidity level of 85%.

December Temperature in Harlowton

In December in Harlowton, the average temperature is -3°C (27°F). Maximum temperatures can reach 17°C (63°F), while minimums can dip as low as -26°C (-15°F). This makes it essential for travelers to pack appropriately for a wide range of weather conditions.

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

The chart illustrates December temperature patterns in Harlowton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harlowton, December typically has an average temperature of -3°C (27°F), with highs reaching up to 17°C (63°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec241832395061696757423326
Data source: Temperature data for Harlowton 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 Harlowton

In Harlowton in December, the precipitation amount is 25 mm (1.0 in) over the course of 7 days.

December Precipitation Trends in Harlowton

The chart displays monthly precipitation patterns in Harlowton, 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 Harlowton, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec194126636762182238332625
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Harlowton

In Harlowton in December humidity is 85%. With an average temperature of -3°C (27°F), this humidity feels like a biting chill that seeps through layers of clothing, making travel seem daunting and the cold air sting your skin.

December Average Humidity in Harlowton

This chart illustrates the average monthly humidity levels in Harlowton, 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 Harlowton is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%85%77%72%75%78%79%76%67%69%78%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Harlowton

In Harlowton 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 Harlowton, you can visit Hourly UV Index in Harlowton.

Maximum UV Index Levels in Harlowton for December

The chart shows the monthly maximum UV Index (UVI) for Harlowton 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 Harlowton typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246891010108532
Data source: Harlowton 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 Harlowton Compares to Other Months

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

This table compares monthly weather conditions in Harlowton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)19 mm (0.8 inches)81%low
February Weather-8°C (19°F)41 mm (1.6 inches)85%moderate
March Weather0°C (32°F)26 mm (1.0 inches)77%high
April Weather4°C (39°F)63 mm (2.5 inches)72%very high
May Weather10°C (51°F)67 mm (2.6 inches)75%very high
June Weather16°C (61°F)62 mm (2.4 inches)78%very high
July Weather21°C (69°F)17 mm (0.7 inches)79%very high
August Weather20°C (67°F)21 mm (0.8 inches)76%very high
September Weather14°C (57°F)38 mm (1.5 inches)67%very high
October Weather5°C (42°F)33 mm (1.3 inches)69%moderate
November Weather1°C (33°F)26 mm (1.0 inches)78%moderate
December Weather-3°C (27°F)25 mm (1.0 inches)85%low

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