Click on a day for an hourly weather forecast
The weather in Iceland in May is very cold with temperatures between 4°C and 9°C, warm clothes are a must.
You can expect rain for roughly half of the month of May 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.
You can expect a few days of snow in Iceland during May. It’s important to get out your snow boots and warm mittens to stay warm while you explore Iceland.
Our weather forecast can give you a great sense of what weather to expect in Iceland in May 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 |