Sarnia Weather in December

December in Sarnia sees daytime temperatures around 3°C (37°F) and lows of -3°C (27°F) at night. With around 71 mm (2.8 in) of snow/rainfall expected, it's worth packing a rain jacket.

Rainfall in Sarnia in December

Historically, the month has about 13 days of snow/rain, averaging 71 mm (2.8 in) in total. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Sarnia in December

Expect highs of 3°C (37°F) in Sarnia in December, with nights dropping to around -3°C (27°F). December is a notable month of the winter season. Staying warm is the main priority this month, especially during mornings and evenings. Nights are well below freezing at -3°C (27°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. Prepare for a very cold month by layering your clothing. It's always better to be prepared for the cold than to face it unprotected.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Sarnia. Our weather planner can help you explore destinations with more pleasant weather conditions.