Reykjavik Weather in August
Iceland · Subarctic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Reykjavik sees average temperatures ranging from a low of 8.6°C (47.5°F) to a high of 13.0°C (55.4°F), with a mean of 10.8°C (51.4°F). Compared to the annual average of 4.5°C (40.1°F), this month is 6.3°C warmer than the yearly norm. This is the hottest month of the year, reaching 13.0°C (55.4°F) on average. Precipitation averages 128.4mm, making it approximately 2.0mm drier than the monthly average of 130.0mm. The city receives an average of 7.6 hours of sunshine per day during August, with relative humidity averaging 83.9%. Wind speeds reach an average maximum of 18.8 km/h. For travelers, this month offers a hottest month of the year experience in Reykjavik, with drier-than-average conditions compared to the rest of the year.
Planning around Reykjavik's daylight is more important than temperature. I was there in June and the midnight sun meant I could hike at 11pm — disorienting but incredible. December gives you about 4 hours of daylight, which limits outdoor plans severely. The data shows mild temperatures for the latitude (rarely below -5°C thanks to the Gulf Stream), but wind chill is the real factor. Pack windproof everything, regardless of season.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 10.7°C (51.3°F) | 10.8°C (51.4°F) | 7.8°C (46.0°F) |
| Rainfall | 84.6mm | 128.4mm | 140.1mm |
| Sunshine | 8.8 hrs | 7.6 hrs | 5.9 hrs |
| Humidity | 83.3% | 83.9% | 82.8% |
| Wind | 17.8 km/h | 18.8 km/h | 22.3 km/h |
| Rainy Days | 20.4 | 20.6 | 21.8 |
| Snowfall | 0.0 cm | 0.0 cm | 1.2 cm |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Reykjavik in August, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Reykjavik in August?
The average temperature in Reykjavik during August ranges from 8.6°C (47.5°F) to 13.0°C (55.4°F), with a mean of 10.8°C (51.4°F).
How much does it rain in Reykjavik in August?
Reykjavik receives an average of 128.4mm of precipitation in August, spread across approximately 20.6 rainy days.
What should I pack for Reykjavik in August?
Based on August weather data, pack warm layers, a medium jacket, and waterproof outerwear. Rain gear is essential — this month averages 128.4mm of precipitation.
Is August a good time to visit Reykjavik?
August is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Reykjavik
Cities with Similar August Climate (Subarctic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 64.15°, -21.94°. Timezone: Atlantic/Reykjavik. Last updated: 2026-07-30.