Reykjavik Climate — Average Highs, Lows & Rainfall by Month
Reykjavik has a temperate climate with four distinct seasons. Daytime temperatures average 13°C / 56°F in August, the warmest month, and drop to 1°C / 35°F in January, the coldest. Overnight lows in January average -3°C / 26°F. Reykjavik receives about 1585 mm of rain a year across roughly 201 wet days, with January the wettest month.
Averages for 2021–2025 · Open-Meteo Historical Weather API (ERA5 reanalysis) · Updated 2026-10-05
Monthly averages in Reykjavik
Average daytime high, overnight low and rainfall for each month of the year.
| Month | Avg high | Avg low | Rainfall | Wet days |
|---|---|---|---|---|
| January | 1°C / 35°F | -3°C / 26°F | 166 mm | 18 |
| February | 3°C / 37°F | -2°C / 29°F | 162 mm | 18 |
| March | 4°C / 38°F | -1°C / 30°F | 146 mm | 16 |
| April | 7°C / 44°F | 1°C / 35°F | 118 mm | 15 |
| May | 9°C / 48°F | 4°C / 40°F | 133 mm | 19 |
| June | 11°C / 51°F | 7°C / 44°F | 106 mm | 17 |
| July | 13°C / 56°F | 9°C / 48°F | 88 mm | 16 |
| August | 13°C / 56°F | 9°C / 48°F | 124 mm | 16 |
| September | 10°C / 51°F | 6°C / 43°F | 147 mm | 18 |
| October | 6°C / 44°F | 2°C / 36°F | 147 mm | 17 |
| November | 4°C / 39°F | 0°C / 32°F | 121 mm | 15 |
| December | 2°C / 35°F | -3°C / 27°F | 129 mm | 16 |
Best time to visit Reykjavik
July, June, April offer the most comfortable weather in Reykjavik: mild daytime temperatures with the year's lowest rainfall — July averages 13°C (56°F); June averages 11°C (51°F); April averages 7°C (44°F).
Reykjavik climate FAQ
- What is the hottest month in Reykjavik?
- August is the hottest month in Reykjavik, with average daytime highs of 13°C / 56°F and overnight lows of 9°C / 48°F (averages for 2021–2025).
- What is the coldest month in Reykjavik?
- January is the coldest month in Reykjavik, with average highs of 1°C / 35°F and lows of -3°C / 26°F.
- How much rain does Reykjavik get a year?
- Reykjavik receives about 1585 mm of rainfall a year, spread over roughly 201 wet days. January is the wettest month (166 mm on average) and July the driest (88 mm).
- When is the best time to visit Reykjavik?
- July, June, April are the most comfortable months in Reykjavik: mild daytime temperatures with the least rainfall of the year.
Want today's conditions instead of averages?
See live weather in Reykjavik →Source: Open-Meteo Historical Weather API (ERA5 reanalysis), Open-Meteo. Averages are daily means across 2021–2025 and are rounded for display — for a live forecast see the Reykjavik weather page.