Cool
Average highs are around 10°C, so pack for cooler days.
December verdict
Isles of Scilly, United Kingdom in December
Weather score10Poor
Poor for holiday weather
Average highs are around 10°C, so pack for cooler days. Sunshine averages 1.6h per day, so this is not one of the brighter months. Rainfall averages 142mm, so some wet days are possible.
December weather
Monthly averages
Temp
10°C
Rain
142mm
Sun
1.6h
Sea
12°C
Weather score
10
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 142mm, so some wet days are possible.
Limited sun
Sunshine averages 1.6h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Isles of Scilly, United Kingdom with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December10°C average high
December is on the cooler side of Isles of Scilly's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December142mm average rain
December is one of Isles of Scilly's wettest months, so rain is likely to be a major planning factor.
Driest monthsApril to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December1.6 hours average sun
December is one of Isles of Scilly's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December12°C average sea
December is below Isles of Scilly's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
December10 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.
