Cool
Average highs are around 14°C, so pack for cooler days.
September verdict
Isle of Arran, United Kingdom in September
Weather score13Poor
Poor for holiday weather
Average highs are around 14°C, so pack for cooler days. Sunshine averages 3.4h per day, so this is not one of the brighter months. Rainfall averages 172mm, so some wet days are possible.
September weather
Monthly averages
Temp
14°C
Rain
172mm
Sun
3.4h
Sea
14°C
Weather score
13
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 172mm, so some wet days are possible.
Limited sun
Sunshine averages 3.4h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 14°C, so the water can feel cool.
Map
Weather map
Compare Isle of Arran, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September14°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
September172mm average rain
September is one of Isle of Arran's wettest months, so rain is likely to be a major planning factor.
Driest monthsFebruary and April to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September3.4 hours average sun
September sits close to Isle of Arran's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September14°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to September
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
September13 weather score
September scores below Isle of Arran's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsApril to August
These months have the strongest weather score in the monthly averages.
