Weather in Arequipa in September 2025
Average weather
Average temperature in Arequipa in September
The expected average maximum temperature in September is +73°F with a maximum of +77°F and a minimum of +43°F.
The average maximum temperature goes up 16% by the end of the month, compared with the beginning of the month, from +70°F to +75°F.
Is Arequipa warm or cold in September?
Arequipa is typically mild in September.
Maximum temperatures go up compared to the previous month from +70°F to +70°F. The minimum temperature also goes up from +48°F to +50°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Arequipa, here is the comparison with other months:
Climate in Arequipa in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +70°F | +70°F | +72°F | ||||
| Min. temperature | ||||||
| +37°F | +43°F | +45°F | ||||
| Max. temperature | ||||||
| +77°F | +77°F | +79°F | ||||
| Rainfall | ||||||
| 2 mm | 4 mm | 9 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 27% | 30% | 35% | ||||
| Air pressure | ||||||
| 1015 HPa | 1015 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 27 | 23 | 19 | ||||
| Cloudy days | ||||||
| 2 | 5 | 7 | ||||
| Rainy days | ||||||
| 2 | 3 | 5 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. The temperature levels stay the same in the area of +70°F for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 2 mm to 4 mm. Humidity rises from 27% to 30%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 27 sunny days in August to 23 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Arequipa is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
How was the weather last September in Arequipa?
Climate Change Over the Years
The climate in Arequipa in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1985 (+65°F) and the highest in 2024 (+70°F). The driest year was 1992 with only 426 mm of rainfall, and the wettest year was 1985 with 1239 mm.
FAQ
Is September a good time to visit Arequipa?
Can you sunbathe in Arequipa in September?
Is Arequipa rainy in September?
Is it sunny in Arequipa in September?
Other cities in Peru
Monthly weather in Arequipa
Source of the data
For this page, we’ve looked at the typical weather in Arequipa, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
