Monthly climate averages for Callao, Peru. Based on 10-year ERA5 reanalysis data.
BWh Hot Desert
Climate OverviewCallao, Peru in September has warm conditions, with highs averaging 20.1°C (68°F). Rain is rare, falling on about 0 days this month. Sea temperature stays cool at 17.1°C (63°F).
This month falls at the beginning of Spring.
Temperatures remain fairly steady throughout September, with daily highs around 20°C (68°F).
Rainfall is heaviest during the last third of the month, while the middle tends to be drier.
The warmest days tend to fall around the 29th, averaging 20.5°C (69°F).
Daily averages based on historical data (2016–2025)
Daytime temperatures around 20°C (68°F) are ideal for full-day outdoor exploration.
Rain is uncommon in this month, so most days stay dry from morning through evening.
1 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 26°C / 21°C | 30°C / 24°C | 8days (29 mm) Wet | 10.5h Excellent | 83% Humid | 9.4 Very High | Good | View Details |
| February | 27°C / 22°C | 31°C / 25°C | 9days (35 mm) Wet | 10.1h Excellent | 81% Humid | 9.3 Very High | Good | View Details |
| March | 27°C / 22°C | 31°C / 25°C | 9days (34 mm) Wet | 10h Excellent | 82% Humid | 9.1 Very High | Good | View Details |
| April best | 25°C / 20°C | 28°C / 22°C | 3days (9 mm) Excellent | 10.6h Excellent | 84% Humid | 8.2 Very High | Excellent | View Details |
| May best | 22°C / 18°C | 24°C / 19°C | 1days (3 mm) Excellent | 10.5h Excellent | 86% Very Muggy | 7.1 Very High | Excellent | View Details |
| June best | 20°C / 16°C | 22°C / 17°C | 0days (2 mm) Excellent | 10.4h Excellent | 87% Very Muggy | 6.7 High | Excellent | View Details |
| July best | 20°C / 15°C | 21°C / 16°C | 0days (1 mm) Excellent | 10.6h Excellent | 86% Very Muggy | 7.1 Very High | Excellent | View Details |
| August best | 20°C / 15°C | 21°C / 15°C | 0days (2 mm) Excellent | 10.8h Excellent | 85% Humid | 7.9 Very High | Excellent | View Details |
| September | 20°C / 15°C | 22°C / 16°C | 0days (2 mm) Excellent | 11.1h Excellent | 84% Humid | 8.6 Very High | Excellent | View Details |
| October | 21°C / 16°C | 23°C / 16°C | 1days (4 mm) Excellent | 11.4h Excellent | 84% Humid | 8.9 Very High | Excellent | View Details |
| November | 22°C / 17°C | 24°C / 18°C | 1days (3 mm) Excellent | 11.4h Excellent | 84% Humid | 9.3 Very High | Excellent | View Details |
| December | 24°C / 18°C | 27°C / 20°C | 2days (9 mm) Excellent | 11h Excellent | 84% Humid | 9.2 Very High | Excellent | View Details |
Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.
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