Cool
Average highs are around 17°C, so pack for cooler days.
Weather Guide
Rathlin Island, United Kingdom Average Monthly Weather
Weather score19Poor annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 11°C, sunshine averages 3.3h per day, and rainfall totals about 1154mm. Sea temperatures average 11°C across the year.
Annual weather
Annual averages
Temp
11°C
Rain
1154mm
Annual total
Sun
3.3h
Sea
11°C
Weather score
19
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 98mm, so some wet days are possible.
Limited sun
Sunshine averages 4.3h 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 Rathlin Island, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August17°C average high
August is one of Rathlin Island's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August98mm average rain
August sits near Rathlin Island's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsFebruary to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August4.3 hours average sun
August sits close to Rathlin Island's 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
August14°C average sea
August is one of Rathlin Island's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
August26 weather score
August scores above Rathlin Island's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsApril to August
These months have the strongest weather score in the monthly averages.
Hotels near Rathlin Island, United Kingdom
Marriott
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