Mild
Average highs are around 23°C, so days are mild rather than hot.
December verdict
Saint Helena (island), Saint Helena, Ascension and Tristan da Cunha in December
Weather score82Very good
Very good for holiday weather
Average highs are around 23°C, so days are mild rather than hot. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 3mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
23°C
Rain
3mm
Sun
0h
Sea
22°C
Weather score
82
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 3mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 22°C, so the water can feel cool.
Map
Weather map
Compare Saint Helena (island), Saint Helena, Ascension and Tristan da Cunha with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December23°C average high
December is close to Saint Helena (island)'s yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJanuary to April
This stretch sets the upper range for average daytime heat.
Rain
December3mm average rain
December is close to Saint Helena (island)'s usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
December0 hours average sun
December is close to Saint Helena (island)'s usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
December22°C average sea
December is below Saint Helena (island)'s yearly sea-temperature average, so swimming can feel fresher.
Warmest seaFebruary to May
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
December82 weather score
December sits close to Saint Helena (island)'s yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to April
These months have the strongest weather score in the monthly averages.