5-day weather forecast Reykjavík 18-08-2026
Weather forecast Reykjavík Tuesday, August 18 18.08.2026: cloudy, temperature from 11 °C to 13 °C.
Precipitation probability 33%. Wind up to 7.11 m/s (gusts 10.17 m/s). Air humidity 70–91%, atmospheric pressure 753–755 mm Hg, UV index up to 4.
5 days at a glance — tap a day to open it
Sunrise 05:28
Sunset 21:34
Sunset 21:34
First Quarter37% illuminated
Moonrise 15:26 · Moonset 20:48
Moonrise 15:26 · Moonset 20:48
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Patchy rain possible | 12 °C | 27% (0.15 mm/hr) | 59% | 81% | 754 mm Hg | ENE 78° 6.81 (9.75) m/s | 0 |
| 01:00 |  Patchy light drizzle | 12 °C | 33% (0.2 mm/hr) | 69% | 80% | 754 mm Hg | E 80° 7.11 (10.17) m/s | 0 |
| 02:00 | Patchy rain possible | 12 °C | 31% (0.09 mm/hr) | 100% | 78% | 754 mm Hg | ENE 74° 6.39 (9.36) m/s | 0 |
| 03:00 | Patchy rain possible | 12 °C | 24% (0.02 mm/hr) | 100% | 78% | 754 mm Hg | ENE 64° 5.31 (8.14) m/s | 0 |
| 04:00 |  Cloudy | 12 °C | 18% | 76% | 78% | 753 mm Hg | NE 53° 4.31 (6.81) m/s | 0 |
| 05:00 | Cloudy | 12 °C | 20% | 85% | 78% | 753 mm Hg | NE 49° 3.31 (5.36) m/s | 0 |
| 06:00 |  Overcast | 11 °C | 23% | 100% | 78% | 753 mm Hg | NNE 30° 2.31 (3.78) m/s | 0 |
| 07:00 | Overcast | 11 °C | 23% | 100% | 78% | 753 mm Hg | N 9° 2.19 (3.47) m/s | 0.1 |
| 08:00 |  Partly cloudy | 12 °C | 14% | 54% | 78% | 754 mm Hg | N 9° 2.11 (3.17) m/s | 0.2 |
| 09:00 |  Cloudy | 12 °C | 15% | 63% | 77% | 754 mm Hg | N 5° 1.61 (2.28) m/s | 0.4 |
| 10:00 | Overcast | 13 °C | 19% | 94% | 74% | 754 mm Hg | NNW 344° 1.61 (2.19) m/s | 0.6 |
| 11:00 | Overcast | 13 °C | 19% | 95% | 72% | 754 mm Hg | NW 325° 1.5 (2.06) m/s | 1 |
| 12:00 | Cloudy | 13 °C | 13% | 65% | 71% | 754 mm Hg | NW 304° 1.69 (2.33) m/s | 1.3 |
| 13:00 | Cloudy | 13 °C | 13% | 65% | 71% | 754 mm Hg | WNW 289° 2.31 (3.17) m/s | 3 |
| 14:00 |  Patchy rain possible | 13 °C | 15% (0.01 mm/hr) | 79% | 70% | 754 mm Hg | WNW 291° 3.31 (4.53) m/s | 3 |
| 15:00 | Partly cloudy | 13 °C | 11% | 46% | 72% | 754 mm Hg | WNW 292° 4.31 (6.03) m/s | 4 |
| 16:00 | Partly cloudy | 13 °C | 13% | 59% | 74% | 754 mm Hg | WNW 287° 4.81 (6.67) m/s | 4 |
| 17:00 | Partly cloudy | 13 °C | 12% | 45% | 77% | 754 mm Hg | WNW 291° 4.81 (6.83) m/s | 4 |
| 18:00 | Cloudy | 12 °C | 22% | 87% | 81% | 755 mm Hg | WNW 293° 4.31 (6.17) m/s | 3 |
| 19:00 | Partly cloudy | 12 °C | 18% | 62% | 84% | 755 mm Hg | WNW 294° 3.61 (5.03) m/s | 4 |
| 20:00 | Cloudy | 11 °C | 21% | 69% | 87% | 755 mm Hg | WNW 295° 2.61 (3.64) m/s | 3 |
| 21:00 | Partly cloudy | 11 °C | 16% | 33% | 89% | 755 mm Hg | WNW 292° 1.61 (2.33) m/s | 4 |
| 22:00 |  Clear | 11 °C | 15% | 20% | 90% | 755 mm Hg | W 271° 1.11 (1.72) m/s | 0 |
| 23:00 | Clear | 11 °C | 15% | 19% | 91% | 755 mm Hg | SW 223° 0.81 (1.31) m/s | 0 |
Reykjavík on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.