Arequipa weather in September
September is one of the best months to visit Arequipa: highs of 19°C (66°F) and about 3 mm (0.1 in) of rain on average. Nights average 3°C (38°F) and cloud cover 29% (NASA POWER, 2001–2025 averages). It is the 5th driest month of the year and the 3rd warmest. Compared with August, it is warmer and wetter; October brings highs of 20°C (67°F) and 7 mm (0.3 in) of rain.
Is September a good time to visit Arequipa?
best month Weather score 91/100.
Yes. September is one of the best months for weather in Arequipa.
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Does it rain a lot in Arequipa in September?
No, it is usually dry: about 3 mm (0.1 in) falls in an average September. It is the 5th driest month of the year.
How warm is Arequipa in September?
Days average 19°C (66°F) and nights 3°C (38°F).
Arequipa weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 18°C (64°F) | 5°C (42°F) | 35 mm | 63% | least pleasant |
| February | 17°C (63°F) | 6°C (42°F) | 47 mm | 68% | least pleasant |
| March | 18°C (64°F) | 5°C (42°F) | 25 mm | 57% | fair |
| April | 18°C (65°F) | 5°C (40°F) | 6 mm | 41% | best |
| May | 18°C (64°F) | 3°C (37°F) | 2 mm | 29% | best |
| June | 17°C (63°F) | 2°C (35°F) | 0 mm | 26% | best |
| July | 17°C (63°F) | 2°C (35°F) | 2 mm | 27% | best |
| August | 18°C (65°F) | 2°C (36°F) | 1 mm | 26% | best |
| September | 19°C (66°F) | 3°C (38°F) | 3 mm | 29% | best |
| October | 20°C (67°F) | 4°C (39°F) | 7 mm | 36% | best |
| November | 20°C (67°F) | 5°C (40°F) | 4 mm | 39% | best |
| December | 19°C (65°F) | 5°C (41°F) | 16 mm | 52% | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
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