Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
September verdict
Banana Islands, Sierra Leone in September
Weather score48Mixed
Mixed for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 4h per day, so this is not one of the brighter months. Rainfall averages 505mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
28°C
Rain
505mm
Sun
4h
Sea
27°C
Weather score
48
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 505mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 27°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Banana Islands, Sierra Leone with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September28°C average high
September is on the cooler side of Banana Islands' year, useful if you prefer less intense daytime heat.
Warmest monthsJanuary to May and November to December
This stretch sets the upper range for average daytime heat.
Rain
September505mm average rain
September sits near Banana Islands' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4 hours average sun
September is below Banana Islands' yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to April and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September27°C average sea
September is below Banana Islands' yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJanuary to June and October to December
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
September48 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.