Yerevan weather by month
Yerevan runs from about 0°C in December to 27°C in August, with May the wettest month at 134 mm.
warmest month
August
27°C
coolest month
December
0°C
wettest month
May
134 mm
worst air month
November
18 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 0°C | 39 mm | 193 h | 16 |
| February | 3°C | 16 mm | 262 h | 12 |
| March | 6°C | 86 mm | 257 h | 8 |
| April | 16°C | 26 mm | 330 h | 7 |
| May | 16°C | 134 mm | 348 h | 6 |
| June | 25°C | 35 mm | 401 h | 4 |
| July | 26°C | 34 mm | 409 h | 10 |
| August | 27°C | 5 mm | 387 h | 8 |
| September | 22°C | 45 mm | 331 h | 6 |
| October | 12°C | 69 mm | 289 h | 8 |
| November | 5°C | 53 mm | 256 h | 18 |
| December | 0°C | 22 mm | 240 h | 17 |
About 3,703 hours of sun a year. Roughly 58 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.