Click on a day for an hourly weather forecast
The weather in Isafjordur in September is very cold with temperatures between 0°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Isafjordur. 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.
You can expect a few days of snow in Isafjordur during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Isafjordur.
Our weather forecast can give you a great sense of what weather to expect in Isafjordur in September 2025.
If you’re planning to visit Isafjordur in the near future, we highly recommend that you review the 14 day weather forecast for Isafjordur before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -11° | 9 | 3 | 22 | 188 mm | Awful | Isafjordur in January |
| February | -2° / -11° | 7 | 3 | 20 | 183 mm | Awful | Isafjordur in February |
| March | 0° / -10° | 9 | 2 | 24 | 170 mm | Awful | Isafjordur in March |
| April | 3° / -7° | 7 | 7 | 16 | 113 mm | Awful | Isafjordur in April |
| May | 7° / -3° | 10 | 12 | 9 | 119 mm | Awful | Isafjordur in May |
| June | 12° / 2° | 7 | 21 | 2 | 83 mm | Awful | Isafjordur in June |
| July | 14° / 4° | 9 | 22 | 0 | 135 mm | Ok | Isafjordur in July |
| August | 13° / 3° | 11 | 20 | 0 | 153 mm | Bad | Isafjordur in August |
| September | 9° / 0° | 12 | 16 | 3 | 193 mm | Awful | Isafjordur in September |
| October | 4° / -4° | 13 | 7 | 11 | 239 mm | Awful | Isafjordur in October |
| November | -1° / -8° | 8 | 5 | 18 | 208 mm | Awful | Isafjordur in November |
| December | -4° / -11° | 7 | 4 | 22 | 225 mm | Awful | Isafjordur in December |