Historical weather data, all-time temperature records, and monthly climate averages for Medan, North Sumatra, Indonesia. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Medan is almost guaranteed to be a wet one — across 66 years of records, there's a 98% historical chance of rainfall on this date. Expect the usual tropical warmth, with an average high of 86° and low of 72°, though 1977 was a particularly wild year, holding both the warmest high (90°) and coldest low (69°) ever recorded on this date.
Medan's all-time temperature range is surprisingly narrow for a city this close to the equator — just 34 degrees separating the record high of 98° (July 21, 2025) from the record low of 64° (January 10, 1965). The real extremes here are measured in rainfall, with a single day in November 2008 dropping a staggering 5.77 inches.
Medan is warm and wet year-round, with monthly highs barely budging — only 4 degrees separate the coolest weeks of January (83° avg high) from the warmest in late May (87°). If you're trying to dodge the heaviest rain, avoid late October through early November, when weekly precipitation averages nearly 4 inches. There's no true dry season here, just slightly less wet.