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.

Sunrise 05:28
Sunset 21:34
First Quarter37% illuminated
Moonrise 15:26 · Moonset 20:48
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Table

Forecast from 11 °C to 13 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)121212121212111112121313131313131313121211111111
Precipitation (mm/hr)0.150.20.090.0200000000000.01000000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)5969100100768510010054639495656579465945876269332019
Rain chance (%)273331241820232314151919131315111312221821161515

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)6.817.116.395.314.313.312.312.192.111.611.611.51.692.313.314.314.814.814.313.612.611.611.110.81
Wind gust (m/s)9.7510.179.368.146.815.363.783.473.172.282.192.062.333.174.536.036.676.836.175.033.642.331.721.31
Wind direction (°)ENE 78°E 80°ENE 74°ENE 64°NE 53°NE 49°NNE 30°N 9°N 9°N 5°NNW 344°NW 325°NW 304°WNW 289°WNW 291°WNW 292°WNW 287°WNW 291°WNW 293°WNW 294°WNW 295°WNW 292°W 271°SW 223°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)818078787878787878777472717170727477818487899091

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)754754754754753753753753754754754754754754754754754754755755755755755755

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index00000000.10.20.40.611.333444343400

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.