Iceland weather in September 2025
September
Iceland weather in September 2025
September
Day
10 °C
Night
5 °C
Sea
9 °C
Precipitation
90 mm
in month
Rainy days
11 days
in month
Daylight
13 hours
average
Sunshine
3 hours
average
Humidity
81 %
Day
10 °C
Night
5 °C
Sea
9 °C
Precipitation
90 mm
in month
Rainy days
11 days
in month
Daylight
13 hours
average
Sunshine
3 hours
average
Humidity
81 %
Overview: IcelandIceland – here is where stunning landscapes, dramatic geothermal activity, and mythical allure come together. Explore the ethereal beauty of the Golden Circle, where you can witness the mighty Gullfoss waterfall, the geothermal marvels of Geysir, and the tectonic rift at Þingvellir National Park. Immerse yourself in the otherworldly landscapes of the black sand beaches, glittering ice caves, and towering glaciers. Experience the enchanting Northern Lights dance across the night sky, and relax in the soothing geothermal pools of the Blue Lagoon. Iceland promises an extraordinary adventure that will leave you in awe of nature's wonders.
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Weather overview and FAQs
Weather overview
In September in Iceland, the average air temperature ranges from 10 °C (51 °F) during the day to 5 °C (41 °F) at night. There are 11 days of rain on average, where the rainfall is 90 mm (3.55 in).
Is September a good month to visit Iceland?
In September there are not good conditions to visit Iceland. A relatively low temperature of 10 °C (51 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The night temperature of 5 °C (41 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.
What temperature can I expect during the day in Iceland in September?
In September in Iceland, the average daily temperatures will be 10 °C (51 °F). Don't forget a sweater and light or normal jacket, but also pack light clothing in case the temperatures are above average. The weather at this time can be somewhat changeable and a wide range of clothing can become handy.
What is the average number of rainy days in September in Iceland?
There are 11 days, which are rainy in Iceland in September, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.5 days of the week, or in general - 35 % days.
What is the rainfall intensity in September in Iceland?
In September in Iceland, there is 90 mm (3.55 in) rainfall, which means on average 3 mm (0.12 in) rainfall per day.
How long is the day (from dawn till dusk) in Iceland in September?
The length of daylight in Iceland in September is 13 hours.
Is there a wet season in Iceland in September?
No, there is no wet season in September in Iceland - you can expect 11 days of rain during the month.
Is Iceland rainier in September than in October?
No, in Iceland in September it does not rain more than in October.
How windy is Iceland in September?
An average wind scale that can be expected in Iceland in September is 6.
Is the weather in Iceland warmer in September than in August?
No, in September in Iceland the temperature is not higher than in August.
Is it freezing in September in Iceland?
It is not very likely that you will experience freezing in Iceland in September, daily temperatures will rise to 5 °C (41 °F).
Is the temperature rising or falling in the course of time in Iceland in September?
During September in Iceland, the day temperatures are decreasing - from 12 °C (53 °F) at the beginning of the month to 8 °C (47 °F) at the end of the month.
How humid is Iceland in September?
Humidity in Iceland in September is 81 %.
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