Click on a day for an hourly weather forecast
The temperatures in Iceland in September are quite cold with temperatures between 7°C and 10°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Iceland. 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 Iceland can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Iceland in September 2025.
If you’re planning to visit Iceland in the near future, we highly recommend that you review the 14 day weather forecast for Iceland before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -1° | 10 | 8 | 13 | 138 mm | Awful | Iceland in January |
| February | 2° / -1° | 10 | 7 | 12 | 119 mm | Awful | Iceland in February |
| March | 3° / -1° | 10 | 7 | 14 | 118 mm | Awful | Iceland in March |
| April | 5° / 1° | 11 | 11 | 8 | 101 mm | Awful | Iceland in April |
| May | 9° / 4° | 9 | 20 | 3 | 88 mm | Awful | Iceland in May |
| June | 12° / 8° | 7 | 23 | 0 | 74 mm | Bad | Iceland in June |
| July | 14° / 9° | 7 | 24 | 0 | 82 mm | Ok | Iceland in July |
| August | 13° / 9° | 8 | 23 | 0 | 97 mm | Bad | Iceland in August |
| September | 10° / 7° | 11 | 18 | 1 | 135 mm | Bad | Iceland in September |
| October | 6° / 4° | 11 | 18 | 2 | 111 mm | Awful | Iceland in October |
| November | 3° / 1° | 10 | 11 | 9 | 96 mm | Awful | Iceland in November |
| December | 1° / -2° | 8 | 11 | 11 | 103 mm | Awful | Iceland in December |