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December Weather in Hays, United States

Last updated: June 24, 2025

In December, the average temperature in Hays, United States hovers around -4°C (26°F), but don't be surprised by the extremes—lows can plunge to -30°C (-22°F), while highs may reach up to 19°C (66°F). Expect about 22 mm (0.9 in) of precipitation spread over 6 days, accompanied by a noteworthy average humidity of 85%. Stay prepared for a chilly adventure!

December Temperature in Hays

In December in Hays, the average temperature is -4°C (26°F). The maximum can reach 19°C (66°F) and the minimum can be as low as -30°C (-22°F). This wide temperature range suggests that travelers should be prepared for both cold and mild weather conditions.

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

The chart illustrates December temperature patterns in Hays, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hays, December typically has an average temperature of -4°C (26°F), with highs reaching up to 19°C (66°F) and lows dropping to around -30°C (-22°F).
JanFebMarAprMayJunJulAugSepOctNovDec231631415364726958433325
Data source: Temperature data for Hays 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 Hays

In Hays in December, the precipitation amount is 22 mm (0.9 in) over a span of 6 days.

December Precipitation Trends in Hays

The chart displays monthly precipitation patterns in Hays, 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 Hays, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec153423375161133153292722
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hays

In Hays in December humidity is 85%. With an average temperature of -4°C (26°F), this humidity feels like a biting chill that seeps through your layers, making travel uncomfortable and urging you to seek warmth quickly.

December Average Humidity in Hays

This chart illustrates the average monthly humidity levels in Hays, 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 Hays 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 Hays

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

Maximum UV Index Levels in Hays for December

The chart shows the monthly maximum UV Index (UVI) for Hays 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 Hays typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357810997532
Data source: Hays 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 Hays Compares to Other Months

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

This table compares monthly weather conditions in Hays, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)15 mm (0.6 inches)81%low
February Weather-9°C (16°F)34 mm (1.3 inches)85%moderate
March Weather0°C (31°F)23 mm (0.9 inches)77%moderate
April Weather5°C (41°F)37 mm (1.4 inches)72%high
May Weather12°C (53°F)51 mm (2.0 inches)75%very high
June Weather18°C (64°F)61 mm (2.4 inches)78%very high
July Weather22°C (72°F)13 mm (0.5 inches)79%very high
August Weather20°C (69°F)31 mm (1.2 inches)76%very high
September Weather14°C (58°F)53 mm (2.1 inches)67%high
October Weather6°C (43°F)29 mm (1.1 inches)69%moderate
November Weather1°C (34°F)27 mm (1.1 inches)78%moderate
December Weather-4°C (26°F)22 mm (0.9 inches)85%low

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