Cluj-Napoca weather by month
Cluj-Napoca runs from about 0°C in January to 24°C in July, with June the wettest month at 85 mm.
warmest month
July
24°C
coolest month
January
0°C
wettest month
June
85 mm
worst air month
January
28 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 0°C | 25 mm | 173 h | 28 |
| February | 6°C | 21 mm | 194 h | 18 |
| March | 8°C | 72 mm | 240 h | 16 |
| April | 13°C | 56 mm | 311 h | 9 |
| May | 16°C | 47 mm | 380 h | 7 |
| June | 22°C | 85 mm | 405 h | 6 |
| July | 24°C | 63 mm | 419 h | 6 |
| August | 24°C | 50 mm | 383 h | 7 |
| September | 18°C | 58 mm | 278 h | 8 |
| October | 10°C | 37 mm | 253 h | 10 |
| November | 3°C | 35 mm | 173 h | 17 |
| December | 1°C | 27 mm | 113 h | 26 |
About 3,322 hours of sun a year. Roughly 60 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.