5-day weather forecast Reykjavík Sep 4, 2026
9°Weather forecast Reykjavík today Sep 4, 2026: patchy rain possible, temperature from 8 °C to 10 °C.
Precipitation probability 33%. Wind up to 7.11 m/s (gusts 11.11 m/s). Air humidity 70–100%, atmospheric pressure 746–752 mm Hg, UV index up to 1.9.
5 days at a glance — tap a day to open it
Sunrise 06:19
Sunset 20:34
Sunset 20:34
Last Quarter39% illuminated
Moonrise does not rise today · Moonset does not set today
Moonrise does not rise today · Moonset does not set today
Chart
Table
Fri, Sep 4, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 10 °C | 18% | 99% | 70% | 746 mm Hg | N 0° 4.5 (4.53) m/s | 0 |
| 01:00 | Overcast | 10 °C | 18% | 100% | 70% | 746 mm Hg | N 350° 4.31 (4.42) m/s | 0 |
| 02:00 | Overcast | 10 °C | 19% | 99% | 71% | 746 mm Hg | N 351° 4.19 (4.31) m/s | 0 |
| 03:00 | Overcast | 10 °C | 19% | 100% | 71% | 746 mm Hg | N 354° 3.69 (3.81) m/s | 0 |
| 04:00 | Overcast | 10 °C | 18% | 92% | 71% | 746 mm Hg | N 351° 3.31 (3.33) m/s | 0 |
| 05:00 |  Cloudy | 10 °C | 15% | 76% | 72% | 746 mm Hg | NNW 342° 3.31 (7.31) m/s | 0 |
| 06:00 |  Partly cloudy | 9 °C | 13% | 59% | 73% | 746 mm Hg | NNW 336° 3.5 (8.5) m/s | 0 |
| 07:00 | Cloudy | 9 °C | 12% | 75% | 100% | 746 mm Hg | NNW 333° 3.31 (8.31) m/s | 0 |
| 08:00 | Cloudy | 9 °C | 15% | 65% | 76% | 747 mm Hg | NNW 330° 3.19 (3.19) m/s | 0.1 |
| 09:00 | Cloudy | 9 °C | 17% | 73% | 78% | 747 mm Hg | NW 324° 3.19 (3.19) m/s | 0.3 |
| 10:00 | Cloudy | 9 °C | 17% | 73% | 78% | 747 mm Hg | NW 317° 3.39 (3.5) m/s | 0.7 |
| 11:00 |  Partly cloudy | 9 °C | 14% | 52% | 78% | 747 mm Hg | NW 309° 3.69 (3.81) m/s | 1.2 |
| 12:00 | Partly cloudy | 9 °C | 15% | 60% | 78% | 748 mm Hg | WNW 302° 3.61 (3.64) m/s | 1.6 |
| 13:00 |  Overcast | 9 °C | 21% | 91% | 78% | 748 mm Hg | WNW 291° 2.89 (3.14) m/s | 1.9 |
| 14:00 | Overcast | 9 °C | 21% | 88% | 78% | 749 mm Hg | WNW 284° 1.81 (2.03) m/s | 1.8 |
| 15:00 |  Patchy rain possible | 10 °C | 19% (0.02 mm/hr) | 73% | 78% | 749 mm Hg | WNW 286° 1.31 (1.61) m/s | 1.5 |
| 16:00 | Partly cloudy | 10 °C | 12% | 33% | 78% | 749 mm Hg | WNW 296° 3.39 (8.39) m/s | 0.9 |
| 17:00 | Patchy rain possible | 9 °C | 20% (0.01 mm/hr) | 74% | 81% | 749 mm Hg | WNW 294° 6.39 (9.39) m/s | 0.5 |
| 18:00 | Patchy rain possible | 9 °C | 26% (0.02 mm/hr) | 96% | 83% | 750 mm Hg | WNW 285° 7.11 (11.11) m/s | 0.3 |
| 19:00 | Patchy rain possible | 8 °C | 29% (0.05 mm/hr) | 98% | 81% | 750 mm Hg | W 276° 6.5 (9.5) m/s | 0.1 |
| 20:00 | Patchy rain possible | 8 °C | 31% (0.08 mm/hr) | 100% | 79% | 751 mm Hg | W 268° 5.61 (10.61) m/s | 0 |
| 21:00 |  Patchy rain possible | 8 °C | 33% (0.1 mm/hr) | 100% | 78% | 751 mm Hg | W 261° 5.19 (10.19) m/s | 0 |
| 22:00 | Patchy rain possible | 8 °C | 30% (0.07 mm/hr) | 100% | 78% | 752 mm Hg | W 260° 4.89 (9.89) m/s | 0 |
| 23:00 | Patchy rain possible | 8 °C | 27% (0.05 mm/hr) | 100% | 76% | 752 mm Hg | W 259° 4.69 (7.69) m/s | 0 |
Fri, Sep 4, 2026
Frequently asked questions about the 5-day weather in Reykjavík
What will the weather be like in Reykjavík over the next 5 days?
Over the next 5 days in Reykjavík the temperature is expected to range from about 7 to 12 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in Reykjavík?
The chance of rain in Reykjavík over the next 5 days reaches 33%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for Reykjavík?
A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.
Which of the next 5 days in Reykjavík will be the warmest and which the coolest?
Over the next 5 days the temperature in Reykjavík ranges from about 7 to 12 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in Reykjavík over the next 5 days?
Over the next 5 days the wind in Reykjavík picks up to 10 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in Reykjavík is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 33%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for Reykjavík?
The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.
Will I need an umbrella or sunscreen in Reykjavík this week?
Rain reaches a 33% chance across the next 5 days, so pack something waterproof for the wettest of them — the daily strip above shows which. Today’s UV index peaks at 1.9; sunscreen is worth it from about 3 upwards.
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.