The weather in Porsgrunn in January is very cold with temperatures between -2°C and 1°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Porsgrunn during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Porsgrunn is going to experience quite a number of days of snow during January. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Porsgrunn in January 2026.
If you’re planning to visit Porsgrunn in the near future, we highly recommend that you review the 14 day weather forecast for Porsgrunn before you arrive.
