Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
September verdict
Medan, North Sumatra, Indonesia in September
Weather score55Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 5.2h per day, enough for a balanced month. Rainfall averages 263mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
31°C
Rain
263mm
Sun
5.2h
Sea
30°C
Weather score
55
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 263mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.2h per day, enough for a balanced month.
Warm sea
Sea temperatures average 30°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Medan, North Sumatra, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September31°C average high
September is close to Medan's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September263mm average rain
September is wetter than Medan's yearly average, so flexible plans matter more.
Driest monthsJanuary to March and June to July
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.2 hours average sun
September is below Medan's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsFebruary to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September30°C average sea
September is close to Medan's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaMarch to November
Sea temperatures are usually near 30°C in this stretch, so swimming comfort is at its strongest.
Weather score
September55 weather score
September scores below Medan's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to March and June to July
These months have the strongest weather score in the monthly averages.
