nomadseason

December Weather in Saint Lawrence, United States

Last updated: June 24, 2025

In December, the average temperature in Saint Lawrence, United States hovers around 3°C (38°F). Be prepared for chilly conditions, as temperatures can dip to a frigid -14°C (7°F) or rise to a maximum of 18°C (64°F). Rainfall is common, with an average precipitation of 99 mm (3.9 in) spread over 9 days. The air carries a notable humidity of 85%, making it feel even cooler.

December Temperature in Saint Lawrence

In December in Saint Lawrence, the average temperature is 3°C (38°F). Maximums can reach 18°C (64°F) and minimums can be as low as -14°C (7°F). Be prepared for a wide temperature range during your travels, ensuring you pack for both warm and cold conditions.

December Weather in Saint Lawrence: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint Lawrence, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Lawrence, December typically has an average temperature of 3°C (38°F), with highs reaching up to 18°C (64°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec343742536372787569594437
Data source: Temperature data for Saint Lawrence 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 Saint Lawrence

In Saint Lawrence in December, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

December Precipitation Trends in Saint Lawrence

The chart displays monthly precipitation patterns in Saint Lawrence, 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 Saint Lawrence, December typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec671051031031361091411511001018799
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Saint Lawrence

In Saint Lawrence in December, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.

December Average Humidity in Saint Lawrence

This chart illustrates the average monthly humidity levels in Saint Lawrence, 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 Saint Lawrence is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Lawrence

In Saint Lawrence 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 Saint Lawrence, you can visit Hourly UV Index in Saint Lawrence.

Maximum UV Index Levels in Saint Lawrence for December

The chart shows the monthly maximum UV Index (UVI) for Saint Lawrence 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 Saint Lawrence typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Saint Lawrence 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 Saint Lawrence Compares to Other Months

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

This table compares monthly weather conditions in Saint Lawrence, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)67 mm (2.6 inches)87%moderate
February Weather3°C (37°F)105 mm (4.1 inches)85%moderate
March Weather6°C (42°F)103 mm (4.1 inches)85%high
April Weather12°C (53°F)103 mm (4.0 inches)83%very high
May Weather17°C (63°F)136 mm (5.3 inches)75%very high
June Weather22°C (72°F)109 mm (4.3 inches)73%very high
July Weather25°C (78°F)141 mm (5.5 inches)65%very high
August Weather24°C (75°F)151 mm (5.9 inches)62%very high
September Weather21°C (70°F)100 mm (3.9 inches)66%very high
October Weather15°C (59°F)101 mm (4.0 inches)79%high
November Weather7°C (45°F)87 mm (3.4 inches)87%moderate
December Weather3°C (38°F)99 mm (3.9 inches)85%low

Compare Saint Lawrence's Climate with Cities Worldwide