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IcelandThe weather in September in Reykjavík
It's cool in September in Reykjavík 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 Reykjavík. 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 Reykjavík, 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, Reykjavík 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.
Water temperature
The water temperature at Reykjavík is 12°C this month. This is too cold to swim without protective gear.
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 Reykjavík
Click on any day in September to get detailed info about the usual weather on that day in Reykjavík. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Reykjavík | 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 Reykjavík 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 Reykjavík 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.
Find affordable trips to Reykjavík
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 Reykjavík for all months and discover the best travel time
Curious about the weather in other parts of Iceland? Check out the climate and weather for spots like Vík, Húsavík, or explore other destinations in Iceland.
Temperature charts
These charts show the average temperatures in September in Reykjavík, Iceland. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Reykjavík
Temperature in September in Reykjavík over the years
Precipitation charts
These charts show the average amount of precipitation in September in Reykjavík, 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 Reykjavík
Total precipitation in September in Reykjavík over the years
Daily Snowfall in September in Reykjavík
Snowfall in September in Reykjavík per year
Daily UV index in September in Reykjavík
This chart shows the average daily UV index in September in Reykjavík, 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 Reykjavík
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Average weather in Reykjavík by month
Click on a month below to see detailed weather info for Reykjavík. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.