Daytime highs, nighttime lows and the warmest cities across Iceland this September.
Iceland, experiences maximum daytime temperatures in September ranging from 8°C (46°F) in Jokulsarlon Glacial Lagoon to 13°C (55°F) in Hella. Nighttime temperatures generally drop to 7°C (45°F) in Hella and 4°C (39°F) in Jokulsarlon Glacial Lagoon.
Explore the map below to discover average September temperatures at the top destinations in Iceland. For a deeper dive, simply click on any destination dot.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Iceland.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Drill down to September weather for any region in Iceland.
Pick a city to see its September weather averages.
Daytime temperatures in Reykjavík typically peak at 12°C (54°F) in September, putting it in the moderate range.
Nighttime temperatures in Reykjavík typically drop to around 6°C (43°F) in September.
Based on our systematic data collection, Hella has been identified as the city with the highest average temperatures. The daytime temperature usually hovers around 13°C (55°F), while at night it goes down to an approximate temperature of 7°C (45°F).
Our database indicates that in September, Jokulsarlon Glacial Lagoon is the city with the coolest temperatures in Iceland. You can expect daytime highs of 8°C (46°F) and nighttime lows close to 4°C (39°F).
Most areas experience a moderate amount of sunshine, with approximately 121 hours of sunlight expected in Reykjavík. This makes it neither too gloomy nor overly bright.
The water temperature averages approximately 11°C (52°F) in Vestmannaeyjar this month, so not the best month to swim.
We have much more information about the climate in Iceland.
Weather and climate has detailed information for every country in the world. Are you going to Iceland? Get detailed 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 travel conditions. Find out where to go with our weather planner.
Need travel inspiration? Check out our bucket list articles and be inspired.
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