Climate averages 1991–2020
Callao weather
in May.
A warm, very dry month: the 6th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Callao: daytime highs average 22.3°C and nights cool to about 17.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 2.3 mm of rain on fewer than one day, which makes May a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 34 min on an average May day.
The nearest other city in this atlas is Lima (12 km away). In May its highs average 23.0°C, 0.8°C warmer than Callao, with 1.8 mm of rain.
Among the 24 cities listed in Peru, Callao ranks 17th of 24 for the warmest May highs and 6th of 24 for the driest May (rainfall, lowest first). The mean May high of those 24 cities is 23.7°C; Callao is 1.5°C cooler than that mean.
From May to June, average highs fall by 1.8°C to 20.5°C, and monthly rainfall rises from 2.3 mm to 4.9 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Callao climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.6°C20.3°C | 20.3°C | 5.2 | 1.5 | 12.713 h |
| February | 26.6°C21.4°C | 21.4°C | 7.8 | 2.0 | 12.512 h |
| March | 26.5°C21.2°C | 21.2°C | 5.9 | 1.7 | 12.212 h |
| April | 24.7°C19.5°C | 19.5°C | 1.6 | 0.2 | 11.812 h |
| May, selected | 22.3°C17.6°C | 17.6°C | 2.3 | 0.2 | 11.612 h |
| June | 20.5°C16.2°C | 16.2°C | 4.9 | 1.1 | 11.411 h |
| July | 19.6°C15.4°C | 15.4°C | 5.3 | 1.2 | 11.511 h |
| August | 19.6°C15.0°C | 15.0°C | 4.9 | 1.2 | 11.712 h |
| September | 20.1°C15.3°C | 15.3°C | 3.7 | 0.5 | 12.012 h |
| October | 20.9°C15.8°C | 15.8°C | 2.8 | 0.3 | 12.412 h |
| November | 22.0°C16.8°C | 16.8°C | 2.2 | 0.1 | 12.713 h |
| December | 23.7°C18.5°C | 18.5°C | 2.7 | 0.6 | 12.813 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Lima in MayPeru · 12 kmHigh 23.0°C · Low 17.7°C · 1.8 mm rain
- Santa Anita - Los Ficus in MayPeru · 18 kmHigh 20.9°C · Low 16.3°C · 1.8 mm rain
- Chosica in MayPeru · 48 kmHigh 24.1°C · Low 18.1°C · 4.4 mm rain
- Chincha Alta in MayPeru · 186 kmHigh 24.2°C · Low 18.3°C · 0.2 mm rain
- Huancayo in MayPeru · 209 kmHigh 13.6°C · Low 4.5°C · 53 mm rain
- Huánuco (approximate) in MayPeru · 255 kmHigh 23.0°C · Low 15.3°C · 48 mm rain
- Ica in MayPeru · 271 kmHigh 27.2°C · Low 18.0°C · 0.2 mm rain
- Chimbote in MayPeru · 367 kmHigh 22.6°C · Low 18.0°C · 1.3 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Callao) is explained once on the Callao year overview and on the Sources, method and limits page.