Tonami Weather in December

During December, Tonami experiences low daytime temperatures of 9°C (48°F) and cooler nights around 1°C (34°F). December sits within the rainy season, and part of the winter season, so expect regular and often heavy rainfall.

Rainfall in Tonami in December

As part of the rainy season, Tonami sees around 27 days of rain in December, with an average of 211 mm (8.3 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.

Temperature in Tonami in December

In December, Tonami gets low temperatures, with highs of 9°C (48°F). Nights cool to around 1°C (34°F). The winter season takes place during December. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With overnight lows of 1°C (34°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Tonami. Our weather planner can help you explore destinations with more pleasant weather conditions.