Cusco weather by month
Cusco runs from about 11°C in July to 13°C in January, with November the wettest month at 298 mm.
warmest month
January
13°C
coolest month
July
11°C
wettest month
November
298 mm
worst air month
September
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 13°C | 183 mm | 314 h | 5 |
| February | 13°C | 193 mm | 270 h | 5 |
| March | 13°C | 139 mm | 296 h | 5 |
| April | 12°C | 68 mm | 308 h | 7 |
| May | 13°C | 18 mm | 317 h | 7 |
| June | 12°C | 11 mm | 305 h | 7 |
| July | 11°C | 3 mm | 337 h | 7 |
| August | 12°C | 12 mm | 347 h | 8 |
| September | 13°C | 40 mm | 323 h | 10 |
| October | 13°C | 91 mm | 331 h | 6 |
| November | 13°C | 298 mm | 277 h | 6 |
| December | 12°C | 190 mm | 287 h | 6 |
About 3,712 hours of sun a year. Roughly 124 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.