nomadseason

December Weather in Stephenville, Canada

Last updated: June 18, 2025

In December, the average temperature in Stephenville, Canada hovers around -1°C (30°F), with a potential minimum of -11°C (13°F) and a balmy maximum of 12°C (55°F). Expect 163 mm (6.4 in) of precipitation, typically spread over 22 days, along with an average humidity level of 85%, creating a chilly and moist atmosphere.

December Temperature in Stephenville

In December in Stephenville, the average temperature is -1°C (30°F). Maximums can reach 12°C (55°F), while minimums can drop to as low as -11°C (13°F). Be sure to dress warmly and prepare for variable weather conditions when traveling to Stephenville this month.

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

The chart illustrates December temperature patterns in Stephenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stephenville, December typically has an average temperature of -1°C (30°F), with highs reaching up to 12°C (55°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec242226354353626456473829
Data source: Temperature data for Stephenville 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 Stephenville

In Stephenville in December, the precipitation amount is 163 mm (6.4 in) over the course of 22 days.

December Precipitation Trends in Stephenville

The chart displays monthly precipitation patterns in Stephenville, 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 Stephenville, December typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec10913112011211112389115144148172163
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Stephenville

In Stephenville in December humidity is 85%. With an average temperature of -1°C (30°F), this humidity feels like a heavy, damp blanket that envelops you, making even short excursions outside feel chilling and uncomfortable.

December Average Humidity in Stephenville

This chart illustrates the average monthly humidity levels in Stephenville, 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 Stephenville is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%90%89%88%87%85%90%90%87%84%83%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Stephenville

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

Maximum UV Index Levels in Stephenville for December

The chart shows the monthly maximum UV Index (UVI) for Stephenville 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 Stephenville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789886422
Data source: Stephenville 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 Stephenville Compares to Other Months

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

This table compares monthly weather conditions in Stephenville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)109 mm (4.3 inches)88%low
February Weather-6°C (22°F)131 mm (5.2 inches)90%moderate
March Weather-3°C (27°F)120 mm (4.7 inches)89%moderate
April Weather2°C (36°F)112 mm (4.4 inches)88%high
May Weather6°C (43°F)111 mm (4.4 inches)87%very high
June Weather12°C (54°F)123 mm (4.8 inches)85%very high
July Weather16°C (62°F)89 mm (3.5 inches)90%very high
August Weather18°C (65°F)114 mm (4.5 inches)90%very high
September Weather13°C (57°F)144 mm (5.7 inches)87%high
October Weather8°C (47°F)148 mm (5.8 inches)84%moderate
November Weather3°C (38°F)172 mm (6.8 inches)83%low
December Weather-1°C (30°F)163 mm (6.4 inches)85%low

Compare Stephenville's Climate with Cities Worldwide