Average weather for Iceland 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.
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. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
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.
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.
Iceland in September |
New York | ||
|---|---|---|---|
 Average temperature |
10°C | 27°C | |
 Max. temperature |
12°C | 31°C | |
| Min. temperature |
7°C | -5°C | |
 Total precipitation |
117 mm | 57 mm | |
| Rainy days |
18 days | 9 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?
Looking for sun? September isn’t a good month to be in Iceland. There’s too much chance of rain this month.
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.
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.
Daily Temperature in September in Iceland
This chart shows the average daily high and low temperatures in September for Iceland, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in September in Iceland
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Although there were several hours of sunshine, it alternated... more
Daily Precipitation in September in Iceland
The chart below shows the average daily precipitation in September for Iceland, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 18 days of precipitation in Iceland.
Daily Snowfall in September in Iceland
This chart shows the average daily snowfall in September in Iceland, measured in centimeters. 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 few years.
Total precipitation in September in Iceland over the years
This chart shows the average precipitation in September in Iceland, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in September in Iceland per year
This chart shows the average snowfall in September in Iceland, measured in centimeters, over the past few years.
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.
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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Share your weather experience in September in Iceland.
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.
