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Reykjavík weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Reykjavík?
For a warm holiday, the best week has been 25–31 July (Weather Index 33). Favourable start dates for a 7-day trip run from 21 July to 28 July. July and August are warmest (14°C), July and August are driest and May, June and July have the most sun.
- Warmest
- July and August 14°C
- Coolest
- January, February and December 3°C
- Driest
- July and August 46% rain-day chance
- Wettest
- February 63% rain-day chance
- Sunniest
- May, June and July 11 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Reykjavík
Reykjavík historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 2.6 | -1.9 | 57.7 | 17.9 | 127.3 | 1.8 |
| February | 3.4 | -1.1 | 63.2 | 17.7 | 130.2 | 3.9 |
| March | 4.2 | -0.5 | 56.1 | 17.4 | 117.9 | 7.1 |
| April | 7.3 | 2.3 | 50.3 | 15.1 | 109.2 | 9.2 |
| May | 9.6 | 4.6 | 58.1 | 18.0 | 109.1 | 11.5 |
| June | 11.9 | 7.2 | 50.3 | 15.1 | 86.1 | 11.3 |
| July | 14.1 | 9.2 | 45.8 | 14.2 | 73.3 | 11.0 |
| August | 13.7 | 8.9 | 45.8 | 14.2 | 90.5 | 10.0 |
| September | 11.0 | 6.3 | 59.0 | 17.7 | 132.9 | 7.6 |
| October | 7.6 | 3.5 | 55.8 | 17.3 | 127.0 | 5.0 |
| November | 4.8 | 1.1 | 48.3 | 14.5 | 102.2 | 2.6 |
| December | 3.1 | -0.7 | 51.9 | 16.1 | 109.7 | 0.9 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.