The temperatures in Portsmouth in December are quite cold with temperatures between 6°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Portsmouth. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Portsmouth can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Portsmouth in December 2024.
If you’re planning to visit Portsmouth in the near future, we highly recommend that you review the 14 day weather forecast for Portsmouth before you arrive.
Temperatures
9° / 6°
Rainy Days
9
Snowy Days
1
Dry Days
21
Rainfall
122
mm
Sun Hours
7.5
Hrs
