Iceland in september: average Weather, Temperature and Climate, Where to go?
Weather in Iceland in september 2025
Below, find the the weather forecast for september for most popular cities in Iceland. These forecasts are probabilities for the month of september from weather reports for over 10 years. The percentage indicates the probability of having the weather indicated.
Average weather in september in Reykjavík
bad weather 6.6cm
Weather at 6am
47°F
Cloudy
30% of time
23%
19%
14%
Weather at 12pm
50°F
Cloudy
34% of time
20%
18%
15%
Weather at 6pm
50°F
Moderate rain at times
32% of time
24%
19%
13%
Weather at 3am
47°F
32%
19%
17%
16%
More information about the weather in Reykjavík in september
Where to go in Iceland in september?
Where to go in Iceland in september: destination map
Where to go in each region in september?
| East of Iceland (Hofn, Vatnajökul National Park, Seyðisfjörður...) | 50°F | 8 à 13 days | 50°F | bad weather* |
| North of Iceland (Akureyri, Siglufjördur, Raufarhöfn...) | 49°F to 50°F | 6 à 11 days | 45°F to 47°F | very bad weather* |
| South of Iceland (Landmannalaugar, Selfoss, Vík í Mýrdal...) | 41°F to 52°F | 10 à 15 days | 52°F | bad weather* |
| South West of Iceland (Reykjavík, Grindavík, Keflavík...) | 52°F | 10 à 13 days | 50°F to 52°F | bad weather |
| West of Iceland (Borgarnes, Snaefellsnes, Ólafsvík...) | 50°F to 52°F | 7 à 12 days | 49°F to 50°F | bad weather |
| Westfjords (Ísafjörður, Patreksfjörður, Djúpavík...) | 47°F to 50°F | 6 à 10 days | 47°F to 49°F | very bad weather* |
Where should you go in Iceland in september when it comes to the weather?
Remember:
The climate in Iceland in september ranges from bad to very bad depending on the region and city.
The month of September marks the end of summer in Iceland. The weather begins to cool and depending on the location of each locality, the climate is characterized either by the abrupt decrease in temperature as in the case of Akureyri, or by a strong increase in the intensity and frequency of rain - as for Reykjavik. Still, the climate throughout September in Iceland again becomes unfavorable.
Spetember in Reykjavik and South-western Iceland
Reykjavik's climatic conditions are influenced by marine currents and sea breezes. As a result, the city receives more precipitation compared to other localities in Iceland. With dozens of rainy days, prepare for a weather in Iceland throughout September that is very rainy. Moreover, along with the month of January, these months are among the wettest of the year. The drop in temperatures does not help the situation.
September in Akureyri and Northern Iceland
Colder but less rainy, the city of Akureyri is experiencing unpleasant climatic conditions. Temperatures are falling faster than those of other Icelandic communities. Morning temperatures are already around 4° C and we must cover with warm clothes in order to feel comfortable - especially towards the end of the month.
Climate in Iceland in september
Climate in Reykjavík in september
In september, the mean temperature in Reykjavik is 49°F (maximum temperature is 52°F and minimum temperature is 47°F). The climate is quite cold there in september, but it is endurable by dressing hot. With 5.4in over 10 days, you will experience some showers throughout your vacations. But this is moderate and it is only of temporary showers.
With a bad climate, september is not recommended month to go in that area.
| September | |||
| Average temperature | 49°F | ||
| Highest temperature | 52°F | ||
| Lowest temperature | 47°F | ||
| Sea temperature | 50°F | ||
| Rainfall | 5.4in | ||
| Number of days with rainfall | 10 day(s) (33%) | ||
| Humidity | 87% | ||
| Daily sunshine hours | 9 | ||
| Cloud cover | 66% | ||
| Length of day | 13:02 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Akureyri in september
In september, the mean temperature in Akureyri is 41°F (maximum temperature is 49°F and minimum temperature is 34°F). The climate is rather cold in this location in september, but it is liveable when dressing hot. With 8.2in over 11 days, rainfall can happen throughout your trip. But this is pretty reasonably and it is only of temporary showers.
| September | |||
| Average temperature | 41°F | ||
| Highest temperature | 49°F | ||
| Lowest temperature | 34°F | ||
| Sea temperature | 46°F | ||
| Rainfall | 8.2in | ||
| Number of days with rainfall | 11 day(s) (37%) | ||
| Humidity | 92% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 65% | ||
| Length of day | 13:07 | ||
| Our opinion at whereandwhen.net | very bad |
Climate in Borgarnes in september
In the month of september, the mean temperature in Borgarnes is 49°F (maximum temperature is 52°F and minimum temperature is 47°F). The climate is relatively cold in this location in the month of september, but it is bearable when dressing cosy. With 5.4in over 10 days, you risk getting wet slightly throughout your journey. But this is pretty moderate and it is only of temporary showers.
With an unfavorable weather, september is not recommended month to go in Borgarnes in Iceland.
| September | |||
| Average temperature | 49°F | ||
| Highest temperature | 52°F | ||
| Lowest temperature | 47°F | ||
| Sea temperature | 49°F | ||
| Rainfall | 5.4in | ||
| Number of days with rainfall | 10 day(s) (33%) | ||
| Humidity | 87% | ||
| Daily sunshine hours | 9 | ||
| Cloud cover | 66% | ||
| Length of day | 13:03 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Djúpavík in september
In the month of september, the mean temperature in Djúpavík is 47°F (maximum temperature is 50°F and minimum temperature is 43°F). The climate is relatively cold in this city in september, but it is livable when dressing cosy. With 3.8in over 6 days, rain may occur during your vacations. But this is reasonably and you will not be too bothered by it.
With an unfavorable weather, september is not the best time to go there.
| September | |||
| Average temperature | 47°F | ||
| Highest temperature | 50°F | ||
| Lowest temperature | 43°F | ||
| Sea temperature | 46°F | ||
| Rainfall | 3.8in | ||
| Number of days with rainfall | 6 day(s) (20%) | ||
| Humidity | 88% | ||
| Daily sunshine hours | 9 | ||
| Cloud cover | 64% | ||
| Length of day | 13:07 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Grindavík in september
In september, maximum temperature is 52°F and minimum temperature is 49°F (for an average temperature of 50°F). The climate is relatively cold in this city in september, but it is livable by dressing hot. With 8in over 13 days, rain may occur throughout your journey. But this is pretty moderate and you will not be too bothered by it.
With a bad climate, the month of september is not recommended month to go in this locality.
| September | |||
| Average temperature | 50°F | ||
| Highest temperature | 52°F | ||
| Lowest temperature | 49°F | ||
| Sea temperature | 51°F | ||
| Rainfall | 8in | ||
| Number of days with rainfall | 13 day(s) (42%) | ||
| Humidity | 83% | ||
| Daily sunshine hours | 9 | ||
| Cloud cover | 64% | ||
| Length of day | 13:01 | ||
| Our opinion at whereandwhen.net | bad |
All cities in Iceland in september
| Reykjavík in september | bad weather |
| Akureyri in september | very bad weather |
| Borgarnes in september | bad weather |
| Djúpavík in september | bad weather |
| Grindavík in september | bad weather |
| Hofn in september | bad weather |
| Ísafjörður in september | very bad weather |
| Landmannalaugar in september | bad weather |
| Ólafsvík in september | bad weather |
| Patreksfjörður in september | very bad weather |
| Raufarhöfn in september | bad weather |
| Selfoss in september | bad weather |
| Seyðisfjörður in september | very bad weather |
| Siglufjördur in september | very bad weather |
| Snaefellsnes in september | bad weather |
| Vatnajökul National Park in september | bad weather |
| Vík í Mýrdal in september | bad weather |
| Arnarstapi in september | bad weather |
| Asbyrgi Canyon in september | bad weather |
| Askja in september | very bad weather |
| Borgarfjörður eystri in september | bad weather |
| Dettifoss in september | very bad weather |
Weather data for Iceland in september:
Weather data for Iceland in september is derived from an average of the weather forecast since 2009 in Iceland. There is a margin of error and these forecasts are to be considered as general information only. The weather in Iceland can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Iceland.