Riga weather by month
Riga runs from about -5°C in January to 20°C in July, with July the wettest month at 152 mm.
warmest month
July
20°C
coolest month
January
-5°C
wettest month
July
152 mm
worst air month
February
17 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -5°C | 48 mm | 66 h | 16 |
| February | 1°C | 64 mm | 73 h | 17 |
| March | 4°C | 36 mm | 212 h | 16 |
| April | 8°C | 74 mm | 221 h | 7 |
| May | 15°C | 57 mm | 434 h | 6 |
| June | 18°C | 88 mm | 430 h | 6 |
| July | 20°C | 152 mm | 399 h | 6 |
| August | 18°C | 85 mm | 395 h | 6 |
| September | 17°C | 55 mm | 300 h | 8 |
| October | 9°C | 45 mm | 172 h | 10 |
| November | 5°C | 51 mm | 69 h | 15 |
| December | 2°C | 47 mm | 43 h | 13 |
About 2,814 hours of sun a year. Roughly 82 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.