Peru in September: where is it warmest?
In September, Iquitos is the warmest place with 31 °C by day, La Rinconada the coolest with 5 °C. 2 of 6 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sun | Rain days |
|---|---|---|---|---|
| Iquitos | 37 | 31° | 6 h | 22 |
| Arequipa | 99 | 21° | 9 h | 1 |
| Lima | 95 | 20° | 8 h | 0 |
| Machu Picchu | 59 | 19° | 6 h | 23 |
| Cusco | 56 | 16° | 5 h | 26 |
| La Rinconada | 9 | 5° | 6 h | 18 |
Peru in September: quick answers
Peru in September: where is it warmest?
The warmest places in September are Iquitos (31 °C), Arequipa (21 °C) and Lima (20 °C).
Peru in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in Arequipa, Lima and Machu Picchu.
Peru month by month
Peru: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences