Kaunas weather by month
Kaunas runs from about -3°C in January to 21°C in July, with July the wettest month at 115 mm.
warmest month
July
21°C
coolest month
January
-3°C
wettest month
July
115 mm
worst air month
March
14 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -3°C | 64 mm | 69 h | 14 |
| February | 3°C | 72 mm | 69 h | 13 |
| March | 5°C | 17 mm | 218 h | 14 |
| April | 9°C | 103 mm | 215 h | 5 |
| May | 16°C | 36 mm | 430 h | 5 |
| June | 19°C | 69 mm | 395 h | 5 |
| July | 21°C | 115 mm | 376 h | 5 |
| August | 20°C | 59 mm | 383 h | 5 |
| September | 18°C | 40 mm | 305 h | 7 |
| October | 9°C | 50 mm | 163 h | 8 |
| November | 4°C | 42 mm | 68 h | 13 |
| December | 2°C | 69 mm | 40 h | 12 |
About 2,731 hours of sun a year. Roughly 74 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.