Medan weather by month
Medan runs from about 25°C in November to 27°C in May, with November the wettest month at 600 mm.
warmest month
May
27°C
coolest month
November
25°C
wettest month
November
600 mm
worst air month
August
37 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 442 mm | 238 h | 33 |
| February | 26°C | 233 mm | 295 h | 32 |
| March | 27°C | 214 mm | 286 h | 34 |
| April | 27°C | 363 mm | 245 h | 31 |
| May | 27°C | 443 mm | 225 h | 28 |
| June | 27°C | 318 mm | 268 h | 28 |
| July | 27°C | 153 mm | 287 h | 35 |
| August | 26°C | 535 mm | 267 h | 37 |
| September | 26°C | 436 mm | 255 h | 34 |
| October | 26°C | 566 mm | 257 h | 34 |
| November | 25°C | 600 mm | 198 h | 33 |
| December | 26°C | 450 mm | 217 h | 30 |
About 3,038 hours of sun a year. Roughly 329 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.