Portsmouth Weather in December

December in Portsmouth typically sees daytime highs of 14°C (57°F) and nighttime lows of 4°C (39°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

Typically around 11 days of rainfall are expected, averaging 105 mm (4.1 in) for the month. 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

December in Portsmouth sees highs of 14°C (57°F) and lows of 4°C (39°F) overnight. December is a notable month of the winter season. Conditions are often most pleasant around the middle of the day. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Portsmouth in December

With about 158 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you prefer enjoying temperate temperatures and rain-free days, April typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.