Iceland weather in September, averages - Weather and Climate

Iceland weather in September

Planning a journey to Iceland this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in Iceland in September?

September in Iceland generally has temperatures that range from cold to moderate, with precipitation levels ranging from moderate to heavy.

During the day the temperature is cold in Jokulsarlon Glacial Lagoon at 8°C and moderate in Hella at 13°C. As night falls, temperatures generally drop to 7°C in Hella and 4°C in Jokulsarlon Glacial Lagoon.

In September, precipitation varies across different areas. From moderate rainfall in Raufarhöfn with an average of 85 mm to heavy rainfall in Jokulsarlon Glacial Lagoon with 304 mm. 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.

For a closer look at September's conditions in Iceland, see the map below. For a more detailed look at Iceland's yearly weather, check out our Iceland climate page.

Where to go in Iceland in September

Find the average weather conditions in September for the most popular destinations in Iceland on the map below. Click on a destination dot for more detailed information.

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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°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations in Iceland

What is the weather like in September for the 5 most popular destinations in Iceland?

Average weather in Reykjavík

In September Reykjavík generally has moderate temperatures with maximum daytime temperatures around 12°C, minimum nighttime temperatures around 6°C and high monthly rainfall. So on average the conditions are poor that month.

Reykjavík
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
15°C 
9°C 
154 hours 
109 mm 
18 days 
12°C 
6°C 
121 hours 
145 mm 
18 days 
poor 
October   >> October
>>  
8°C 
2°C 
92 hours 
122 mm 
19 days 
poor 
Climate in Reykjavík

Average weather in Akureyri

In September Akureyri generally has low temperatures with maximum daytime temperatures around 9°C, minimum nighttime temperatures around 3°C and high monthly rainfall. So on average the conditions are poor that month.

Akureyri
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
13°C 
6°C 
136 hours 
96 mm 
15 days 
9°C 
3°C 
85 hours 
123 mm 
15 days 
poor 
October   >> October
>>  
4°C 
-2°C 
50 hours 
146 mm 
18 days 
poor 
Climate in Akureyri

Average weather in Keflavík

In September Keflavík generally has low temperatures with maximum daytime temperatures around 12°C, minimum nighttime temperatures around 8°C and high monthly rainfall. So on average the conditions are poor that month.

Keflavík
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
13°C 
10°C 
154 hours 
106 mm 
17 days 
poor 
12°C 
8°C 
121 hours 
149 mm 
18 days 
poor 
October   >> October
>>  
8°C 
4°C 
92 hours 
129 mm 
20 days 
poor 
Climate in Keflavík

Average weather in Höfn

In September Höfn generally has low temperatures with maximum daytime temperatures around 10°C, minimum nighttime temperatures around 6°C and heavy monthly rainfall. So on average the conditions are poor that month.

Höfn
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
12°C 
8°C 
130 hours 
152 mm 
16 days 
poor 
10°C 
6°C 
114 hours 
227 mm 
16 days 
poor 
October   >> October
>>  
7°C 
3°C 
78 hours 
237 mm 
17 days 
poor 
Climate in Höfn

Average weather in Selfoss

In September Selfoss generally has moderate temperatures with maximum daytime temperatures around 12°C, minimum nighttime temperatures around 7°C and heavy monthly rainfall. So on average the conditions are poor that month.

Selfoss
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
15°C 
9°C 
154 hours 
124 mm 
18 days 
12°C 
7°C 
121 hours 
177 mm 
18 days 
poor 
October   >> October
>>  
8°C 
3°C 
92 hours 
151 mm 
19 days 
poor 
Climate in Selfoss

Is your destination not in the list? Have a look at other destinations in Iceland.

Is September the best time to visit Iceland?

Given the typically poor weather conditions in Reykjavík, September may not be the ideal time to visit Iceland.

Generally speaking, the best visiting conditions can be found in June and July offering mostly tolerable weather in Reykjavík. The weather in January, February, March, April, September, October, November and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Iceland. Interested in the weather conditions in a specific month? Select the month below.

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  • 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.

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