Iceland climate
Monthly averages for Reykjavík, 2021–2025
In Reykjavík, the warmest month is August, with an average high of 13°C, and the coldest is January, when nights average −3°C.
About 1586 mm of rain falls in a year, on roughly 201 days. January is the wettest month (166 mm) and July the driest (87 mm).
Wind is strongest in February (20 km/h on average) and lightest in July (12 km/h).
Compared with Dublin, July afternoons are 6°C cooler, and January afternoons 7°C colder.
The hottest day in 2021–2025 reached 19.5°C (14 July 2025), and the coldest night fell to −16.6°C (18 January 2023).
Temperature
Bars run from the average night-time low to the average daytime high, in °C.
Rainfall
Average total rainfall each month, in millimetres.
Wind
Average wind speed at 10 metres each month, in km/h.
| Month | High °C | Low °C | Rain mm | Rain days | Sun h/day | Wind km/h |
|---|---|---|---|---|---|---|
| January | 2 | −3 | 166 | 18 | 1.3 | 18 |
| February | 3 | −2 | 162 | 18 | 3.1 | 20 |
| March | 4 | −1 | 146 | 16 | 5.6 | 16 |
| April | 7 | 1 | 118 | 15 | 7.6 | 15 |
| May | 9 | 4 | 133 | 19 | 9.1 | 14 |
| June | 11 | 6 | 106 | 17 | 8.6 | 14 |
| July | 13 | 9 | 87 | 16 | 8.2 | 12 |
| August | 13 | 9 | 124 | 16 | 7.7 | 13 |
| September | 10 | 6 | 147 | 18 | 6.0 | 15 |
| October | 6 | 2 | 147 | 17 | 4.2 | 15 |
| November | 4 | 0 | 121 | 15 | 2.3 | 17 |
| December | 2 | −3 | 129 | 16 | 0.7 | 17 |
More in Northern Europe: Norway · Sweden · Finland · Denmark · Estonia · Latvia · Lithuania