Cool
Average highs are around 14°C, so pack for cooler days.
May verdict
Belfast, Northern Ireland, United Kingdom in May
Weather score26Poor
Poor for holiday weather
Average highs are around 14°C, so pack for cooler days. Sunshine averages 5.9h per day, enough for a balanced month. Rainfall averages 65mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
14°C
Rain
65mm
Sun
5.9h
Sea
9°C
Weather score
26
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 65mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.9h per day, enough for a balanced month.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Weather map
Compare Belfast, Northern Ireland, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May14°C average high
May is close to Belfast's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May65mm average rain
May is one of Belfast's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsFebruary to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May5.9 hours average sun
May is one of Belfast's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May9°C average sea
May is below Belfast's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to October
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
May26 weather score
May sits close to Belfast'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.
