Cool
Average highs are around 9°C, so pack for cooler days.
September verdict
Reykjavik, Iceland in September
Weather score19Poor
Poor for holiday weather
Average highs are around 9°C, so pack for cooler days. Sunshine averages 3.7h per day, so this is not one of the brighter months. Rainfall averages 86mm, so some wet days are possible.
September weather
Monthly averages
Temp
9°C
Rain
86mm
Sun
3.7h
Sea
10°C
Weather score
19
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 86mm, so some wet days are possible.
Limited sun
Sunshine averages 3.7h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 10°C, so the water can feel cool.
Map
Weather map
Compare Reykjavik, Iceland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September9°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
September86mm average rain
September sits near Reykjavik's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsApril to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September3.7 hours average sun
September sits close to Reykjavik's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September10°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 11°C in this stretch, so swimming comfort is at its strongest.
Weather score
September19 weather score
September sits close to Reykjavik's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsApril to September
These months have the strongest weather score in the monthly averages.
