Reykjavík weather in September (Capital Region, Iceland)

People don't tend to visit Reykjavík in September since it is known as a chilly month. The average maximum daytime temperature in Reykjavík in September lies at 10.2°C (50.36°F). The average minimum temperature goes down to around 4.5°C (40.1°F) (often the minimum temperature is noted at night).

Rainfall during September is high with an average of 106mm (4.2 inchec). This makes it the wettest month of the year. There are generally around 19 rainy days. The sun will show itself now and again, with 121 hours of sunshine during the entire month.


Reykjavík, monthly averages in September

Show in Fahrenheit
Min Temperature 4 °C  
Max Temperature 10 °C  
Water Temperature 10 °C *  
Chance of Rain 66%  
Precipitation 106mm  
Rainy days 20 days  
Humidity 79% *  
Sunshine 121 hrs *  
Percentage Sunshine 30% *  

Where to stay in Reykjavík

Where to go in Iceland in September

Find out more about the weather in Iceland in September and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in September? Visitors traveling to Reykjavík should plan on bringing a totally waterproof coat since it will often be raining. However, also plan on bringing your warm clothes since it can be a bit chilly during this period. With a water temperature of around 10.0°C (50°F), there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Reykjavík.

Our site offers climate and forecast data for every country in the world. Are you going to Iceland? On this website you can find historical weather averages for many cities in Iceland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.