Arequipa Weather in September
September in Arequipa brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 7°C (45°F). Only 1 mm (0.04 in) of rainfall is typical, making it a largely dry month.
Rainfall in Arequipa in September
Typically around 3 days of rainfall are expected, averaging 1 mm (0.04 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.
Temperature in Arequipa in September
September is a perfect month in Arequipa, with 20°C (68°F) during the day and 7°C (45°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Arequipa in September
Expect sunny days throughout the month, with an estimated 298 hours of sunshine. This makes it a pleasant time to visit Arequipa.
Wind Speed in Arequipa in September
September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, July, August, September, October, November and December typically offer the best weather for Arequipa.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Peru, check out our Arequipa's climate page.
Arequipa Temperature in September
Min Temperature
7°C (45°F)
Max Temperature
20°C (68°F)
Chance of Rain
8%
Precipitation
1 mm (0.04 in)
Rainy days
3 days
Humidity
42%
Windspeed
4 m/s (8 knots)
Sunshine
298 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Arequipa typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows around 8°C (46°F).
Average temperatures in September
Historical weather for Arequipa in September
Browse day-by-day weather records for Arequipa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Arequipa historical weather extremes in September
Based on 34 years of weather observations (1991-2025), these are the most extreme conditions recorded in Arequipa.
- The warmest day in September was on September 20, 1996, with a maximum of 26°C (79°F).
- On September 20, 2000, Arequipa saw its coldest September day with temperatures maxing out at 13°C (55°F).
- Arequipa registered its coldest September night on September 19, 1992, with temperatures dropping to -1°C (30°F).
Best Places in Peru in September
Find out more about the weather in Peru and which places have the best travel conditions in this month. See all of Peru in September →
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What to Wear in Arequipa in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Dry conditions mean you won't need to worry about rain protection. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Arequipa in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Peru, check out our Arequipa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Arequipa climate overview or explore weather in Peru.
