Click on a day for an hourly weather forecast
The temperatures in Porsgrunn in October are quite cold with temperatures between 7°C and 11°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Porsgrunn. 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.
Our weather forecast can give you a great sense of what weather to expect in Porsgrunn in October 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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -2° | 5 | 15 | 11 | 125 mm | Awful | Porsgrunn in January |
| February | 1° / -2° | 6 | 11 | 12 | 104 mm | Awful | Porsgrunn in February |
| March | 4° / 1° | 5 | 19 | 6 | 81 mm | Awful | Porsgrunn in March |
| April | 9° / 4° | 4 | 24 | 2 | 50 mm | Bad | Porsgrunn in April |
| May | 13° / 8° | 6 | 25 | 0 | 103 mm | Ok | Porsgrunn in May |
| June | 17° / 12° | 5 | 25 | 0 | 97 mm | Good | Porsgrunn in June |
| July | 19° / 14° | 7 | 24 | 0 | 123 mm | Ok | Porsgrunn in July |
| August | 19° / 14° | 7 | 24 | 0 | 152 mm | Ok | Porsgrunn in August |
| September | 16° / 11° | 6 | 24 | 0 | 136 mm | Good | Porsgrunn in September |
| October | 11° / 7° | 10 | 21 | 0 | 167 mm | Bad | Porsgrunn in October |
| November | 6° / 4° | 9 | 17 | 4 | 158 mm | Awful | Porsgrunn in November |
| December | 3° / 0° | 9 | 14 | 8 | 134 mm | Awful | Porsgrunn in December |