The weather in September in Iceland
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.
Looking for sun? September isn’t a good month to be in Iceland. There’s too much chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Iceland. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 18°C in 2019, Iceland reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was -2°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of -8°C to a highest value of 12°C.
Precipitation and snowfall
In September, there is an average of 117 mm of precipitation, spread over 15 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.
Daily weather in September for Iceland
Click on any day in September to get detailed info about the usual weather on that day in Iceland. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Iceland | New York | |
|---|---|---|
| Average temperature | 10°C | 27°C |
| Max. temperature | 12°C | 31°C |
| Min. temperature | 2°C | -5°C |
| Total precipitation | 117 mm | 57 mm |
| Rainy days | 15 days | 9 days |
| Total snowfall | 5,9 cm | 0 cm |
| Snowy days | 2 days | 0 days |
Start of September
The month of September starts in Iceland with cold temps, averaging around 11°C during the day and nights around 7°C.
Mid September
By mid-September, daytime temps drop to around 10°C, with nights around 5°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Iceland is around 9°C, while nighttime temps are about 3°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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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.
Check out the climate of Iceland for all months and discover the best travel time
The climate in Iceland is based on weather data from Reykjavík. Other places, like VíkHúsavík, might have different weather. You can check out all destinations in Iceland to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Iceland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Iceland
Temperature in September in Iceland over the years
Precipitation charts
These charts show the average amount of precipitation in September in Iceland. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Iceland
Total precipitation in September in Iceland over the years
Daily Snowfall in September in Iceland
Snowfall in September in Iceland per year
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.
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 several hours of sunshine, it alternated with rain and wind. The temperature was cool. Beautiful scenery regardless of the weather.— This text is automatically translated to English
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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.