Temperatures in September
It's cool in September in Iceland with an average temperature of 10°C. Temperatures this month range from a low of 7°C to a high of 12°C. At night, you can expect temperatures between 2°C and 8°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Iceland in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Iceland with cold temperatures, averaging around 11°C during the day and nights close to 7°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature drops to around 10°C, with nights close to 5°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Iceland will be around 9°C, with nights close to 3°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in September
In September, there is an average of 117 mm of precipitation, spread over 18 days. Of the total precipitation, about 5,9 cm falls as snow in September. The wind speed is around 5 Bft, mostly coming from the South.
The average precipitation chance this month is 60% per day. Though that seems frequent, the weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Iceland. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Iceland in September |
UK | ||
|---|---|---|---|
 Average Temperature |
10°C | 20°C | |
 High Temp |
12°C | 22°C | |
| Low Temp |
7°C | 17°C | |
 Total Precipitation |
117 mm | 44 mm | |
| Rainy Days |
18 days | 8 days | |
 Total Snowfall |
5,9 cm | 0 cm | |
| Snowy Days |
2 days | 0 days | |
August
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Iceland?
After some sun? Then September isn’t the best time to be in Iceland. There’s too much chance of rain this month.
Temperature records for Iceland in September
With 18°C, Iceland hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was -2°C in 2021. The extreme night temperatures ranged from a low of -8°C to a high of 12°C.
Check out the climate of Iceland for all months and discover the best travel time
The climate of Iceland is based on weather data from Reykjavík. Other spots, like VíkHúsavík, might have different weather. You can check out all destinations in Iceland for a full picture of the climate.
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Daily Temperature in September in Iceland
This chart shows the average daily temperatures, both day and night, for each day in September in Iceland, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Weather experiences in September in Iceland
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Although there were a few hours of sunshine, it alternated w... more
Daily Precipitation in September in Iceland
The chart below shows the average daily precipitation in September for Iceland, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 18 days of rain in Iceland.
Daily Snowfall in September in Iceland
This chart shows the average daily snowfall in September in Iceland, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV Index in September in Iceland
This chart shows the average daily UV index in September in Iceland, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Iceland Over the Years
This chart shows the average temperature in September in Iceland, measured in degrees Celsius, over the past years.
Total Precipitation in September in Iceland Over the Years
This chart shows the average precipitation in September in Iceland, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in September in Iceland per year
This chart shows the average snowfall in September in Iceland, measured in centimetres, over the past years.
Daily climate in September for Iceland
Click on a specific day in September for detailed info on the typical weather on that day in Iceland. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Iceland
The weather in September in Iceland is rated 3 out of 5 stars by 1 visitor. Have you been to Iceland? Share your weather experience to help other visitors.
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Although there were a few hours of sunshine, it alternated with rain and wind. The temperature was cool. Beautiful scenery, whatever the weather.— This text is automatically translated to English
Have you been to Iceland in September?
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Average Weather in Iceland by Month
Click on a month below to see detailed weather info for Iceland. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
