Asmara weather by month
Asmara runs from about 13°C in December to 21°C in June, with August the wettest month at 246 mm.
warmest month
June
21°C
coolest month
December
13°C
wettest month
August
246 mm
worst air month
May
19 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 14°C | 23 mm | 337 h | 13 |
| February | 17°C | 5 mm | 318 h | 13 |
| March | 18°C | 51 mm | 343 h | 14 |
| April | 19°C | 71 mm | 354 h | 13 |
| May | 20°C | 17 mm | 373 h | 19 |
| June | 21°C | 17 mm | 360 h | 14 |
| July | 17°C | 153 mm | 308 h | 12 |
| August | 16°C | 246 mm | 227 h | 11 |
| September | 18°C | 8 mm | 342 h | 14 |
| October | 17°C | 34 mm | 354 h | 18 |
| November | 14°C | 58 mm | 328 h | 15 |
| December | 13°C | 10 mm | 337 h | 9 |
About 3,981 hours of sun a year. Roughly 70 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.