Cool
Average highs are around 16°C, so pack for cooler days.
September verdict
Blasket Islands, Ireland in September
Weather score21Poor
Poor for holiday weather
Average highs are around 16°C, so pack for cooler days. Sunshine averages 3.6h per day, so this is not one of the brighter months. Rainfall averages 130mm, so some wet days are possible.
September weather
Monthly averages
Temp
16°C
Rain
130mm
Sun
3.6h
Sea
15°C
Weather score
21
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 130mm, so some wet days are possible.
Limited sun
Sunshine averages 3.6h 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 Blasket Islands, Ireland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September16°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
September130mm average rain
September sits near Blasket Islands' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsApril to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September3.6 hours average sun
September sits close to Blasket Islands' yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September15°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 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
September21 weather score
September sits close to Blasket Islands' 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.
