Keflavík weather in September (Reykjanes, Iceland)

Curious about the September weather in Keflavík? This guide provides all the details you need.

In September, Keflavík generally has low temperatures and high rainfall. Throughout the day, temperatures typically settle at around 12°C. But by evening, they drop to around 8°C.

Keflavík in September usually receives high rainfall, averaging around 149 mm for the month. It is the wettest month of the year, so an umbrella might come in handy. Typically around 18 days of rainfall is expected.

The area enjoys a balanced 121 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Keflavík. July generally stands out with the best circumstances. While January, February, March, April, May, August, September, October, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Keflavík climate page with graphs.

 

Keflavík, monthly averages in September

Min Temperature 8°C  

Max Temperature 12°C  

Chance of Rain 61%  

Precipitation 149 mm  

Rainy days 18 days  

Humidity 79% *  

Sunshine 121 hours *  

Percentage Sunshine 30% *  

* Data from: Reykjavík, Iceland (34 KM, 21 Miles).

Where to go in Iceland in September

Find out more about the weather in Iceland in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Keflavík in September?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Outdoor sports

5/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Keflavík.

Our site offers climate and forecast data for every country in the world. Are you going to Iceland? On this website you can find historical weather averages for many cities in Iceland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.