5-day weather forecast Reykjavík 21-04-2026
Weather forecast Reykjavík Tuesday, April 21 21.04.2026: sunny, temperature from 5 °C to 9 °C.
No precipitation expected. Wind up to 3.5 m/s (gusts 6.72 m/s). Air humidity 76–92%, atmospheric pressure 775–779 mm Hg, UV index up to 2.7.
Sunrise 05:35
Sunset 21:20
Sunset 21:20
Waxing Crescent17% illuminated
Moonrise 00:00 · Moonset 00:00
Moonrise 00:00 · Moonset 00:00
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 6 °C | 0% | 12% | 85% | 778 mm Hg | NNW 345° 1.5 (3.14) m/s | 0 |
| 01:00 | Clear | 5 °C | 0% | 2% | 85% | 777 mm Hg | N 353° 1.19 (2.53) m/s | 0 |
| 02:00 | Clear | 5 °C | 0% | 2% | 86% | 777 mm Hg | N 356° 1.11 (2.31) m/s | 0 |
| 03:00 | Clear | 6 °C | 0% | 11% | 91% | 779 mm Hg | SE 124° 3.5 (6.72) m/s | 0 |
| 04:00 | Clear | 5 °C | 0% | 13% | 92% | 779 mm Hg | ESE 122° 3.11 (5.89) m/s | 0 |
| 05:00 | Clear | 5 °C | 0% | 16% | 91% | 779 mm Hg | SE 124° 3.11 (5.81) m/s | 0 |
| 06:00 |  Sunny | 5 °C | 0% | 17% | 91% | 779 mm Hg | SE 126° 3.11 (5.72) m/s | 0 |
| 07:00 | Sunny | 6 °C | 0% | 16% | 91% | 779 mm Hg | SE 124° 2.81 (4.94) m/s | 0.2 |
| 08:00 | Sunny | 6 °C | 0% | 12% | 88% | 779 mm Hg | ESE 120° 2.61 (4.14) m/s | 0.4 |
| 09:00 | Sunny | 7 °C | 0% | 5% | 85% | 779 mm Hg | ESE 122° 2.5 (3.75) m/s | 0.8 |
| 10:00 | Sunny | 8 °C | 0% | 5% | 81% | 779 mm Hg | SE 135° 2.19 (3.25) m/s | 1.3 |
| 11:00 | Sunny | 8 °C | 0% | 10% | 79% | 779 mm Hg | SSE 150° 1.61 (2.39) m/s | 1.9 |
| 12:00 | Sunny | 8 °C | 0% | 13% | 78% | 779 mm Hg | SSE 165° 1.11 (1.67) m/s | 2.4 |
| 13:00 | Sunny | 9 °C | 0% | 8% | 76% | 779 mm Hg | SSW 202° 0.69 (1.03) m/s | 2.7 |
| 14:00 | Sunny | 9 °C | 0% | 6% | 76% | 779 mm Hg | SW 226° 1 (1.47) m/s | 2.7 |
| 15:00 |  Overcast | 8 °C | 0% | 100% | 81% | 776 mm Hg | WNW 284° 1.39 (2.08) m/s | 2.4 |
| 16:00 | Overcast | 8 °C | 0% | 100% | 82% | 776 mm Hg | W 279° 1.31 (1.97) m/s | 1.9 |
| 17:00 | Overcast | 7 °C | 0% | 100% | 82% | 775 mm Hg | W 273° 1 (1.56) m/s | 1.3 |
| 18:00 | Sunny | 7 °C | 0% | 10% | 83% | 775 mm Hg | W 278° 0.61 (0.94) m/s | 0.8 |
| 19:00 | Sunny | 7 °C | 0% | 7% | 83% | 775 mm Hg | SSW 201° 0.31 (0.5) m/s | 0.4 |
| 20:00 | Overcast | 7 °C | 0% | 100% | 84% | 775 mm Hg | SSE 162° 0.89 (1.53) m/s | 0.1 |
| 21:00 | Sunny | 7 °C | 0% | 14% | 88% | 779 mm Hg | SW 234° 0.5 (0.83) m/s | 0 |
| 22:00 | Clear | 6 °C | 0% | 9% | 90% | 779 mm Hg | S 182° 0.69 (1.22) m/s | 0 |
| 23:00 | Clear | 6 °C | 0% | 10% | 90% | 778 mm Hg | SSE 156° 1.31 (2.28) 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.