Dilijan weather by month
Dilijan runs from about -1°C in January to 19°C in July, with May the wettest month at 198 mm.
warmest month
July
19°C
coolest month
January
-1°C
wettest month
May
198 mm
worst air month
July
9 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -1°C | 62 mm | 202 h | 6 |
| February | 1°C | 28 mm | 241 h | 5 |
| March | 3°C | 91 mm | 262 h | 4 |
| April | 12°C | 39 mm | 309 h | 5 |
| May | 12°C | 198 mm | 274 h | 5 |
| June | 18°C | 118 mm | 366 h | 4 |
| July | 19°C | 108 mm | 343 h | 9 |
| August | 19°C | 46 mm | 293 h | 8 |
| September | 15°C | 75 mm | 249 h | 5 |
| October | 9°C | 155 mm | 274 h | 6 |
| November | 3°C | 43 mm | 247 h | 9 |
| December | 0°C | 10 mm | 244 h | 7 |
About 3,304 hours of sun a year. Roughly 99 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 2026-05-27. Full method, licences and the list of sources we rejected are on the methodology page.