Portsmouth Weather in January

With daytime temperatures of 10°C (50°F) and nighttime lows of 0°C (32°F), January in Portsmouth brings low temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 77 mm (3 in) falls on average.

Rainfall in Portsmouth in January

Based on our climate data of the past 30 years, about 10 days of rain are anticipated, with 77 mm (3 in) on average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Portsmouth in January

If you're visiting Portsmouth in January, expect highs of 10°C (50°F) and overnight lows around 0°C (32°F). This month falls in the winter season. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights fall to 0°C (32°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. The temperatures in January are typically the coolest of the year.

Sunshine in Portsmouth in January

The month brings about 173 hours of sunlight, offering a comfortable mix of sun and overcast.

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