Vatnajökull National Park

Iceland Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Iceland in September.

Thinking about venturing to Iceland this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Iceland in September

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

Temperatures

During the day the temperature is cold in Jokulsarlon Glacial Lagoon at 8°C (46°F) and mild in Hella at 13°C (55°F). As night falls, temperatures generally drop to 7°C (45°F) in Hella and 4°C (39°F) in Jokulsarlon Glacial Lagoon.

To learn more about the conditions in specific areas of Iceland, check out the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Raufarhöfn with an average of 85 mm (3.3 in) to heavy rainfall in Jokulsarlon Glacial Lagoon with 304 mm (12 in).

Average sunshine

Sunshine amounts are decent in most places. Reykjavík gets approximately 121 hours of sunlight in September, offering a reasonable amount of both bright and cloudy periods. Curious about sunnier destinations? Our weather planner makes it easy to find places worldwide with pleasant weather.

Explore Iceland by month

Pick a month to see the average temperature, rainfall and sunshine in Iceland — and find the best time to visit. (based on Reykjavík)

Best Places to Visit in Iceland in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Iceland.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Iceland

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

Temperature range in Iceland (September)

Precipitation variation in Iceland (September)

Reykjavík

In September Reykjavík generally has moderate temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 6°C (43°F) and high monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
15°C (59°F)
12°C (54°F)
8°C (46°F)
Min temperature
9°C (48°F)
6°C (43°F)
2°C (36°F)
Monthly sun hours
154 hours
121 hours
92 hours
Monthly rainfall
109 mm (4.3 in)
145 mm (5.7 in)
122 mm (4.8 in)
Monthly rainy days
18 days
18 days
19 days
Weather conditions

Akureyri

In September Akureyri generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
13°C (55°F)
9°C (48°F)
4°C (39°F)
Min temperature
6°C (43°F)
3°C (37°F)
-2°C (28°F)
Monthly sun hours
136 hours
85 hours
50 hours
Monthly rainfall
96 mm (3.8 in)
123 mm (4.8 in)
146 mm (5.7 in)
Monthly rainy days
15 days
15 days
18 days
Weather conditions

Keflavík

In September Keflavík generally has low temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 8°C (46°F) and high monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
13°C (55°F)
12°C (54°F)
8°C (46°F)
Min temperature
10°C (50°F)
8°C (46°F)
4°C (39°F)
Monthly sun hours
154 hours
121 hours
92 hours
Monthly rainfall
106 mm (4.2 in)
149 mm (5.9 in)
129 mm (5.1 in)
Monthly rainy days
17 days
18 days
20 days
Weather conditions

Höfn

In September Höfn generally has low temperatures with maximum daytime temperatures around 10°C (50°F), minimum nighttime temperatures around 6°C (43°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
12°C (54°F)
10°C (50°F)
7°C (45°F)
Min temperature
8°C (46°F)
6°C (43°F)
3°C (37°F)
Monthly sun hours
130 hours
114 hours
78 hours
Monthly rainfall
152 mm (6 in)
227 mm (8.9 in)
237 mm (9.3 in)
Monthly rainy days
16 days
16 days
17 days
Weather conditions

Selfoss

In September Selfoss generally has moderate temperatures with maximum daytime temperatures around 12°C (54°F), minimum nighttime temperatures around 7°C (45°F) and heavy monthly rainfall. So on average the conditions are poor that month.

August
September
October
Max temperature
15°C (59°F)
12°C (54°F)
8°C (46°F)
Min temperature
9°C (48°F)
7°C (45°F)
3°C (37°F)
Monthly sun hours
154 hours
121 hours
92 hours
Monthly rainfall
124 mm (4.9 in)
177 mm (7 in)
151 mm (5.9 in)
Monthly rainy days
18 days
18 days
19 days
Weather conditions

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Iceland in September.

City Weather Day temp Night temp Rainfall
Reykjavík 12°C (54°F) 6°C (43°F) 145 mm (5.7 in)
Akureyri 9°C (48°F) 3°C (37°F) 123 mm (4.8 in)
Keflavík 12°C (54°F) 8°C (46°F) 149 mm (5.9 in)
Vík í Mýrdal 10°C (50°F) 7°C (45°F) 270 mm (11 in)
Ísafjörður 9°C (48°F) 5°C (41°F) 124 mm (4.9 in)
Húsavík 11°C (52°F) 5°C (41°F) 119 mm (4.7 in)

Iceland weather in September: frequently asked questions

What is the weather like in Iceland in September?

In September, Iceland generally has poor weather conditions. Reykjavík sees daytime temperatures near 12°C (54°F), with nights cooling to roughly 6°C (43°F).

What is the average temperature in Iceland in September?

Average temperatures in Iceland during September range from a nighttime low near 6°C (43°F) to a daytime high around 12°C (54°F) in Reykjavík.

Does Iceland get a lot of rain in September?

Reykjavík typically receives notable rainfall in September, about 145 mm (5.7 in) on average across Iceland.

Is September a Good 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.

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.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.