Arequipa is warmest in October, averaging 21° by day and 5° at night. The wettest month is February with 34 mm, and the year brings about 176 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 19° | 7° | 31 mm | 12.9 h | Sightseeing |
| February | 19° | 7° | 34 mm | 12.5 h | Sightseeing |
| March | 19° | 7° | 31 mm | 12.1 h | Sightseeing |
| April | 20° | 6° | 6 mm | 11.6 h | Sightseeing |
| May | 20° | 4° | 3 mm | 11.2 h | Sightseeing |
| June | 19° | 3° | 0 mm | 11.0 h | Sightseeing |
| July | 20° | 3° | 16 mm | 11.1 h | Sightseeing |
| August | 20° | 3° | 0 mm | 11.4 h | Sightseeing |
| September | 21° | 5° | 15 mm | 11.9 h | Sightseeing |
| October | 21° | 5° | 9 mm | 12.4 h | Sightseeing |
| November | 21° | 6° | 9 mm | 12.8 h | Sightseeing |
| December | 20° | 7° | 22 mm | 13.0 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: No month in Arequipa combines swimming warmth with dry skies.
Walking the city: January, February, March, April, May, June, July, August, September, October, November and December — highs of 19–21° and no more than 34 mm of rain a month.