Temperature
Cold by day, freezing at night.
Not the best time: Cold weather and some snow or mixed precipitation are the main limitations.
Cold by day, freezing at night.
Some snow or mixed precipitation is possible this month.
Wintry precipitation and cloud limit sunshine.
Humidity is rarely noticeable in the cool air.
In December, afternoons feel about 23° and nights feel near 22°.
Mostly cloudy skies this month.
Wind is more noticeable in December; open areas can feel blustery.
December stays around 35°F through the day and night.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 38 | 32 | 4.8 | 19 | 0.9 | 78 | 44 |
| Feb | 37 | 31 | 4.7 | 17 | 1.8 | 77 | 43 |
| Mar | 38 | 32 | 4.5 | 18 | 3.6 | 76 | 43 |
| Apr | 42 | 36 | 3.7 | 16 | 4.7 | 77 | 43 |
| May | 46 | 40 | 3.3 | 14 | 6.2 | 77 | 45 |
| Jun | 51 | 46 | 2.7 | 13 | 5.4 | 80 | 48 |
| Jul | 54 | 49 | 3.0 | 13 | 5.5 | 83 | 51 |
| Aug | 54 | 49 | 3.8 | 14 | 5.0 | 83 | 53 |
| Sep | 50 | 45 | 5.5 | 18 | 4.2 | 81 | 50 |
| Oct | 44 | 39 | 4.9 | 16 | 2.7 | 80 | 47 |
| Nov | 40 | 35 | 4.6 | 17 | 1.3 | 78 | 46 |
| Dec | 38 | 33 | 4.8 | 18 | 0.4 | 79 | 44 |
Similar climates
Want a side-by-side climate view? Compare Reykjavík with Tromso.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology