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