Click on a day for an hourly weather forecast
The temperatures in Helgoland in September are comfortable with low of 15°C and and high up to 17°C.
You can expect rain for roughly half of the month of September in Helgoland. 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 Helgoland in September 2026.
If you’re planning to visit Helgoland in the near future, we highly recommend that you review the 14 day weather forecast for Helgoland before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / 3° | 9 | 17 | 5 | 98 mm | Awful | Helgoland in January |
| February | 4° / 2° | 7 | 16 | 5 | 77 mm | Awful | Helgoland in February |
| March | 6° / 4° | 6 | 23 | 2 | 65 mm | Awful | Helgoland in March |
| April | 9° / 6° | 5 | 24 | 0 | 58 mm | Ok | Helgoland in April |
| May | 12° / 10° | 6 | 25 | 0 | 78 mm | Ok | Helgoland in May |
| June | 16° / 13° | 7 | 23 | 0 | 115 mm | Ok | Helgoland in June |
| July | 18° / 16° | 7 | 24 | 0 | 120 mm | Ok | Helgoland in July |
| August | 19° / 17° | 8 | 23 | 0 | 169 mm | Ok | Helgoland in August |
| September | 17° / 15° | 8 | 22 | 0 | 141 mm | Ok | Helgoland in September |
| October | 13° / 11° | 8 | 23 | 0 | 144 mm | Bad | Helgoland in October |
| November | 10° / 8° | 9 | 21 | 1 | 119 mm | Bad | Helgoland in November |
| December | 7° / 5° | 10 | 18 | 3 | 121 mm | Awful | Helgoland in December |