Tartu weather by month
Tartu runs from about -7°C in January to 19°C in July, with July the wettest month at 158 mm.
warmest month
July
19°C
coolest month
January
-7°C
wettest month
July
158 mm
worst air month
January
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -7°C | 47 mm | 42 h | 12 |
| February | -2°C | 39 mm | 79 h | 11 |
| March | 2°C | 18 mm | 173 h | 12 |
| April | 6°C | 65 mm | 200 h | 5 |
| May | 14°C | 14 mm | 441 h | 4 |
| June | 18°C | 57 mm | 431 h | 4 |
| July | 19°C | 158 mm | 378 h | 6 |
| August | 18°C | 71 mm | 361 h | 4 |
| September | 16°C | 38 mm | 302 h | 5 |
| October | 8°C | 33 mm | 160 h | 7 |
| November | 4°C | 76 mm | 47 h | 10 |
| December | 1°C | 49 mm | 40 h | 9 |
About 2,654 hours of sun a year. Roughly 68 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 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.