Keflavík in May
5.0out of 10
Not the best time
Cool: highs only around 8°C. Frequent rain: about 14 rainy days.
8°CAvg high
5°CAvg low
14Rainy days (79 mm)
17:54 hDaylight
04:30Sunrise · 22:23 Sunset
Why this score
- Cool: highs only around 8°C
- Frequent rain: about 14 rainy days
- Rain varies a lot between years (±4.4 days)
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.4 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | 0°C | 125 mm | 19 | – | – | 3.2 |
| February | 3°C | 0°C | 124 mm | 18 | – | – | 3.3 |
| March | 4°C | 0°C | 113 mm | 17 | – | – | 3.5 |
| April | 6°C | 2°C | 91 mm | 15 | – | – | 4.3 |
| May | 8°C | 5°C | 79 mm | 14 | – | – | 5.0 |
| June | 11°C | 8°C | 67 mm | 13 | – | – | 5.5 |
| July | 12°C | 10°C | 74 mm | 13 | – | – | 5.9 |
| August | 12°C | 9°C | 97 mm | 14 | – | – | 5.5 |
| September | 10°C | 7°C | 134 mm | 17 | – | – | 4.6 |
| October | 7°C | 4°C | 119 mm | 15 | – | – | 4.5 |
| November | 5°C | 2°C | 124 mm | 17 | – | – | 3.8 |
| December | 4°C | 1°C | 128 mm | 18 | – | – | 3.3 |
Frequently asked questions
How hot is Keflavík in May?
Daytime highs average 8°C and nights about 5°C.
When is the best time to visit Keflavík?
The best months are July, June, August.