December weather forecastCallao, Peru
December
Weather in December
December’s weather finally marks the onset of summer in Callao, Peru, with temperatures slightly rising from November. Prolonged daylight hours and abundant sunlight characterize city life, fostering a radiant environment. With sea temperatures peaking at 19.3°C (66.7°F), beach visits and water sports amplify. Though the advent of summer curtails wind speed, it remains significant enough to balance the warmth. Interestingly, the cloud% increases, indicating fleeting periods of cloudy weather amidst predominantly dry conditions.Temperature
The shift to December in Callao signals an average high-temperature of a still pleasant 22.6°C (72.7°F), subtly varied from November's 21.4°C (70.5°F). A slight dip in temperature to a comfortable 18.5°C (65.3°F) marks the average nights during December.Humidity
The most humid month in Callao is December, with an average relative humidity of 81%.Rainfall
January, April, May, September through December are months with the least rain in Callao when the rain falls for 1.5 days and typically aggregates up to 1mm (0.04") of rain.Sea temperature
In Callao, the average seawater temperature in December is 19.3°C (66.7°F).Note: For most people, a water temperature of 19.3°C (66.7°F) is not conducive to enjoyable swimming. Breathing control becomes harder as the water temperature dips below 21°C (69.8°F).
Daylight
The month with the longest days in Callao is December, with an average of 12h and 48min of daylight.On the first day of December in Callao, Peru, sunrise is at 05:34 and sunset at 18:21. On the last day of the month, sunrise is at 05:47 and sunset at 18:36 -05.
Sunshine
The average sunshine in December in Callao is 11.2h.UV index
The months with the highest UV index are January through April and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 6 in December translates into this advice:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Callao, Peru
- Average high temperature in December: 22.6°C
The warmest month (with the highest average high temperature) is February (25.1°C).
The month with the lowest average high temperature is August (19.8°C).
- Average low temperature in December: 18.5°C
The month with the highest average low temperature is February (21.6°C).
The coldest month (with the lowest average low temperature) is August (15.2°C).
Average pressure in December
Callao, Peru
- Average pressure in December: 1014.3mbar
The month with the highest atmospheric pressure is August (1016.3mbar).
The month with the lowest atmospheric pressure is February (1013.6mbar).
Average wind speed in December
Callao, Peru
- Average wind speed in December: 13km/h
The windiest month (with the highest average wind speed) is July (14.2km/h).
The calmest month (with the lowest average wind speed) is February (11km/h).
Average humidity in December
Callao, Peru
- Average humidity in December: 81%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is August (77%).
Average rainfall in December
Callao, Peru
- Average rainfall in December: 1mm
The wettest months (with the highest rainfall) are February, March, June, July and August (2mm).
The driest months (with the least rainfall) are January, April, May, September, October, November and December (1mm).
Average rainfall days in December
Callao, Peru
- Average rainfall days in December: 1.5 days
The month with the highest number of rainy days is March (4.6 days).
The month with the least rainy days is November (0.5 days).
Average sea temperature in December
Callao, Peru
- Average sea temperature in December: 19.3°C
The best month for swimming (with the highest average sea temperature) is March (20.9°C).
The coldest month (with the lowest average sea temperature) is September (15.8°C).
Average daylight in December /
Average sunshine in December
Callao, Peru
- Average daylight in December: 12h and 48min
The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 24min).
- Average sunshine in December: 11h and 12min
The month with the most sunshine is October (Average sunshine: 11h and 54min).
The month with the least sunshine is June (Average sunshine: 7h and 24min).
Average sunshine days in December
Callao, Peru
- Average sunshine days in December: 29.2 days
The month with the most sunshine days is December (29.2 days).
The month with the least sunshine days is July (18 days).
Average UV index in December
Callao, Peru
- Average UV index in December: 6
The months with the highest UV index are January, February, March, April and December (UV index 6).
The months with the lowest UV index are May, June, July, August, September, October and November (UV index 5).
Average cloud cover in December
Callao, Peru
- Average cloud cover in December: 30
The month with the most cloud cover is January (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in December
Callao, Peru
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
