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December Weather in Blair, United States

Last updated: June 24, 2025

In December, the average temperature in Blair, United States hovers around -4°C (26°F). While temperatures can dip as low as -29°C (-20°F), they can occasionally rise to a maximum of 17°C (62°F). Expect about 47 mm (1.9 in) of precipitation spread over 7 days, with an average humidity level of a chilly 85%. Stay warm and prepared!

December Temperature in Blair

In December in Blair, the average temperature is -4°C (26°F). Maximums can reach up to 17°C (62°F) and minimums can drop as low as -29°C (-20°F). It's advisable to prepare for a wide range of temperatures when traveling to Blair during this time.

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

The chart illustrates December temperature patterns in Blair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Blair, December typically has an average temperature of -4°C (26°F), with highs reaching up to 17°C (62°F) and lows dropping to around -29°C (-20°F).
JanFebMarAprMayJunJulAugSepOctNovDec181935445970737064493425
Data source: Temperature data for Blair 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 Blair

In Blair in December, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.

December Precipitation Trends in Blair

The chart displays monthly precipitation patterns in Blair, 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 Blair, December typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec334957931401541021441101195447
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Blair

In Blair 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 Blair

This chart illustrates the average monthly humidity levels in Blair, 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 Blair is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Blair

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

Maximum UV Index Levels in Blair for December

The chart shows the monthly maximum UV Index (UVI) for Blair 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 Blair typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458810997532
Data source: Blair 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 Blair Compares to Other Months

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

This table compares monthly weather conditions in Blair, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (19°F)33 mm (1.3 inches)88%low
February Weather-7°C (20°F)49 mm (1.9 inches)89%moderate
March Weather1°C (35°F)57 mm (2.2 inches)86%moderate
April Weather7°C (45°F)93 mm (3.6 inches)85%very high
May Weather15°C (59°F)140 mm (5.5 inches)79%very high
June Weather21°C (70°F)154 mm (6.1 inches)80%very high
July Weather23°C (74°F)102 mm (4.0 inches)80%very high
August Weather21°C (70°F)144 mm (5.7 inches)78%very high
September Weather18°C (64°F)110 mm (4.3 inches)80%high
October Weather9°C (49°F)119 mm (4.7 inches)84%moderate
November Weather1°C (34°F)54 mm (2.1 inches)89%moderate
December Weather-4°C (26°F)47 mm (1.9 inches)85%low

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