Portsmouth Weather in December

December in Portsmouth typically sees daytime highs of 5°C (41°F) and nighttime lows of -4°C (25°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the winter season.

Rainfall in Portsmouth in December

This month experiences about 14 days of snow/rain according to historical data, averaging 128 mm (5 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Portsmouth in December

In December, Portsmouth gets low temperatures, with highs of 5°C (41°F). Nights cool to around -4°C (25°F). December is a notable month of the winter season. Expect a distinctly cold feel throughout the day, not just overnight. Nights drop below freezing to -4°C (25°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. This month is marked by cold temperatures, so wearing layers is key to staying warm. Don't be caught off-guard by the cold.

Sunshine in Portsmouth in December

The month experiences a moderate amount of sunlight, with 134 hours of sunshine. This provides a nice balance between sunshine and clouds.

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