Cool
Average highs are around 8°C, so pack for cooler days.
December verdict
Portmeirion, United Kingdom in December
Weather score8Poor
Poor for holiday weather
Average highs are around 8°C, so pack for cooler days. Sunshine averages 1.1h per day, so this is not one of the brighter months. Rainfall averages 202mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
8°C
Rain
202mm
Sun
1.1h
Weather score
8
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 202mm, so showers are a real planning factor.
Limited sun
Sunshine averages 1.1h per day, so this is not one of the brighter months.
Map
Weather map
Compare Portmeirion, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December8°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December202mm average rain
December is one of Portmeirion'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
December1.1 hours average sun
December is one of Portmeirion's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
December8 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
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