Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
British Indian Ocean Territory in September
Weather score61Good
Good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 209mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
29°C
Rain
209mm
Sun
0h
Sea
28°C
Weather score
61
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 209mm, so showers are a real planning factor.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare British Indian Ocean Territory with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°C average high
September is close to British Indian Ocean Territory's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September209mm average rain
September is wetter than British Indian Ocean Territory's yearly average, so flexible plans matter more.
Driest monthsMarch to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September0 hours average sun
September is close to British Indian Ocean Territory's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September28°C average sea
September is below British Indian Ocean Territory's 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
September61 weather score
September scores below British Indian Ocean Territory's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsFebruary to December
These months have the strongest weather score in the monthly averages.