Cool
Average highs are around 17°C, so pack for cooler days.
September verdict
Dublin, Ireland in September
Weather score31Poor
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 4.2h per day, so this is not one of the brighter months. Rainfall averages 64mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
17°C
Rain
64mm
Sun
4.2h
Sea
15°C
Weather score
31
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 64mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.2h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Dublin, Ireland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September17°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 September
This stretch sets the upper range for average daytime heat.
Rain
September64mm average rain
September is close to Dublin's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
September4.2 hours average sun
September sits close to Dublin's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September15°C average sea
September is one of Dublin's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
September31 weather score
September sits close to Dublin's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
