Climate averages 1991–2020
Callao weather
in December.
A warm, very dry month: the 5th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Callao: daytime highs average 23.7°C and nights cool to about 18.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 2.7 mm of rain on fewer than one day, which makes December a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 49 min on an average December day.
The nearest other city in this atlas is Lima (12 km away). In December its highs average 24.2°C, about as warm as Callao, with 6.2 mm of rain.
Among the 24 cities listed in Peru, Callao ranks 16th of 24 for the warmest December highs and 2nd of 24 for the driest December (rainfall, lowest first). The mean December high of those 24 cities is 24.6°C; Callao is 0.9°C cooler than that mean.
From December to January, average highs rise by 1.9°C to 25.6°C, and monthly rainfall rises from 2.7 mm to 5.2 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Lima in DecemberPeru · 12 kmHigh 24.2°C · Low 18.5°C · 6.2 mm rain
- Santa Anita - Los Ficus in DecemberPeru · 18 kmHigh 22.1°C · Low 17.1°C · 6.2 mm rain
- Chosica in DecemberPeru · 48 kmHigh 24.1°C · Low 18.2°C · 20 mm rain
- Chincha Alta in DecemberPeru · 186 kmHigh 25.2°C · Low 18.7°C · 1.5 mm rain
- Huancayo in DecemberPeru · 209 kmHigh 14.2°C · Low 6.0°C · 214 mm rain
- Huánuco (approximate) in DecemberPeru · 255 kmHigh 23.5°C · Low 16.7°C · 138 mm rain
- Ica in DecemberPeru · 271 kmHigh 28.8°C · Low 19.0°C · 4.7 mm rain
- Chimbote in DecemberPeru · 367 kmHigh 23.3°C · Low 18.3°C · 4.5 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.