Antananarivo weather by month
Antananarivo runs from about 15°C in July to 22°C in November, with January the wettest month at 385 mm.
warmest month
November
22°C
coolest month
July
15°C
wettest month
January
385 mm
worst air month
October
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 21°C | 385 mm | 261 h | 5 |
| February | 21°C | 301 mm | 243 h | 5 |
| March | 21°C | 160 mm | 312 h | 4 |
| April | 20°C | 31 mm | 306 h | 5 |
| May | 17°C | 13 mm | 297 h | 5 |
| June | 16°C | 6 mm | 289 h | 7 |
| July | 15°C | 1 mm | 308 h | 5 |
| August | 16°C | 2 mm | 317 h | 5 |
| September | 18°C | 22 mm | 337 h | 7 |
| October | 19°C | 9 mm | 356 h | 10 |
| November | 22°C | 86 mm | 361 h | 9 |
| December | 22°C | 130 mm | 357 h | 5 |
About 3,744 hours of sun a year. Roughly 106 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 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.