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