Montevideo weather by month
Montevideo runs from about 9°C in July to 23°C in February, with March the wettest month at 165 mm.
warmest month
February
23°C
coolest month
July
9°C
wettest month
March
165 mm
worst air month
July
13 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 22°C | 23 mm | 395 h | 7 |
| February | 23°C | 71 mm | 321 h | 7 |
| March | 21°C | 165 mm | 296 h | 6 |
| April | 18°C | 122 mm | 224 h | 7 |
| May | 13°C | 49 mm | 205 h | 8 |
| June | 13°C | 65 mm | 194 h | 11 |
| July | 9°C | 8 mm | 261 h | 13 |
| August | 12°C | 118 mm | 201 h | 8 |
| September | 14°C | 46 mm | 291 h | 8 |
| October | 17°C | 56 mm | 309 h | 7 |
| November | 20°C | 70 mm | 338 h | 8 |
| December | 20°C | 60 mm | 387 h | 9 |
About 3,422 hours of sun a year. Roughly 87 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.