Callao is warmest in February, averaging 24° by day and 17° at night. The wettest month is March with 9 mm, and the year brings about 33 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 24° | 17° | 3 mm | 20° | 12.6 h | Sightseeing |
| February | 24° | 17° | 6 mm | 21° | 12.4 h | Sightseeing |
| March | 24° | 17° | 9 mm | 21° | 12.1 h | Sightseeing |
| April | 24° | 16° | 3 mm | 20° | 11.7 h | Sightseeing |
| May | 23° | 15° | 0 mm | 18° | 11.4 h | Sightseeing |
| June | 22° | 14° | 0 mm | 18° | 11.3 h | Sightseeing |
| July | 22° | 13° | 0 mm | 17° | 11.4 h | Sightseeing |
| August | 22° | 13° | 0 mm | 17° | 11.6 h | Sightseeing |
| September | 22° | 14° | 0 mm | 16° | 11.9 h | Sightseeing |
| October | 22° | 14° | 0 mm | 16° | 12.3 h | Sightseeing |
| November | 22° | 15° | 3 mm | 17° | 12.6 h | Sightseeing |
| December | 23° | 16° | 9 mm | 18° | 12.7 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: No month in Callao combines swimming warmth with dry skies.
Walking the city: January, February, March, April, May, June, July, August, September, October, November and December — highs of 22–24° and no more than 9 mm of rain a month.