Chancay weather in December

In December, Chancay sees average daytime highs of 23°C and overnight lows near 18°C, with 4 mm of rain across 1 wet days and about 12.7 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 24°C by the end. The sky is clear or mostly clear about 8% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 h 36 min at the start of December to 12 h 42 min by month's end. Set against the rest of the year, December is Chancay's 9th-clearest and 7th-windiest month. For the whole year in context, see Chancay's year-round climate.

Daytime high
23°
5th warmest
Overnight low
18°
8th coldest
Rainfall
4 mm
1 wet days
Daylight
12 h 42 min
5:45 AM – 6:25 PM
Cloud cover
79%
9th clearest
Wind
9 km/h
7th windiest
Solar energy
6.33 kWh/m²
Travel score
7.7
out of 10

Chancay is town in Chancay, Huaral, Lima, Peru.

Founded
1562

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 23°C in the first days to 24°C by the end.

A typical December day in Chancay reaches about 23°C in the afternoon and slips back to 18°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, December runs about 2°C warmer than November and about 2°C cooler than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62317
72318
82318
92318
102318
112318
122318
132318
142318
152318
162318
172318
182418
192418
202418
212418
222418
232418
242419
252419
262419
272419
282419
292419
302419
312419

Chancay weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 20°103.212.67.3
Feb26° / 20°164.712.46.8
Mar26° / 20°143.712.17.1
Apr24° / 19°41.111.88.0
May22° / 17°30.411.58.1
Jun20° / 16°50.511.37.6
Jul19° / 15°60.811.47.4
Aug19° / 15°50.511.67.4
Sep20° / 15°30.311.97.5
Oct21° / 16°20.212.37.5
Nov22° / 17°20.312.57.7
Dec23° / 18°4112.77.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12179
22278
32278
42179
52179
62278
72179
82179
92080
102080
111981
121981
131981
141882
151882
161882
171684
181684
191684
201684
211684
221684
231684
241684
251684
261684
271684
281783
291783
301783
311783

Chance of precipitation in December

Any precipitation

Chancay gets around 4 mm of rain over 1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 6% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
12
22
32
42
52
62
72
82
92
102
112
122
132
143
153
163
173
183
193
204
214
224
234
244
255
265
275
285
296
306
316

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the humid band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
121772
220782
318793
416813
515823
614833
712853
811854
910864
109874
118884
127894
136895
145905
155905
164906
173916
182917
192917
201918
211909
2218910
2318811
2408713
2508614
2608416
2708317
2808119
2907921
3007624
3107426

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 36 min at the start of December to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:40 AM to 5:52 AM, and sunset from 6:18 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:406:18
212.65:406:18
312.65:406:19
412.65:416:19
512.65:416:20
612.75:416:20
712.75:426:21
812.75:426:21
912.75:426:22
1012.75:436:22
1112.75:436:23
1212.75:436:23
1312.75:446:24
1412.75:446:24
1512.75:456:25
1612.75:456:25
1712.75:456:26
1812.75:466:26
1912.75:466:27
2012.75:476:27
2112.75:476:28
2212.75:486:28
2312.75:486:29
2412.75:496:29
2512.75:496:30
2612.75:506:30
2712.75:506:31
2812.75:516:31
2912.75:516:32
3012.75:526:32
3112.75:526:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.33 kWh/m².

For context, solar energy here swings from a low near 4.4 kWh/m² to a high of 6.56 kWh/m² in November across the year — December's 6.33 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in December

Is December a good time to visit Chancay?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.7
Sightseeing
3rd-best month of the year
6.3
Beach & pool
5th-best month of the year

December is one of the better times to visit Chancay for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Chancay in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Chancay sees daytime highs around 23°C and nights near 18°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Chancay in December

The nearest coast averages about 19°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 13 km away) is warmest in February at about 21°C and coldest in October near 17°C.

It's comfortable for a long swim from Jan 3 to Apr 9 — about 3.2 months when the water holds above 20°C.

16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar21Refreshing
Apr20Cool
May19Cool
Jun19Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov18Cool
Dec19Cool

UV index in Chancay in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chancay peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 12UV 15Jun 23UV 9
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug11Extreme
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in Chancay in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Chancay is worst in May — around 30 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (January, 18 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 2130 µg/m³Jan 1818 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar23Moderate
Apr26Moderate
May30Moderate
Jun29Moderate
Jul27Moderate
Aug26Moderate
Sep24Moderate
Oct24Moderate
Nov23Moderate
Dec22Moderate
Location & terrain

Where is Chancay?

Chancay sits at 11.6°S, 77.3°W, 34 m above sea level, in Peru. The nearest listed city is Huaral, 11 km away.

Topography around Chancay

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chancay.

Within 3 km, the terrain around Chancay has significant variations in elevation — a maximum elevation change of 442 m around an average of 75 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 952 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,169 m.

The land around Chancay is covered by bare terrain (43%) and water (32%) within 3 km, water (48%) and bare terrain (26%) within 16 km, and water (44%) and bare terrain (30%) within 80 km.

3 km
442 m
16 km
952 m
80 km
5,169 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Huaral 11 km · Callao 55 km · Carmen De La Legua Reynoso 57 km · Lima 59 km · Breña 59 km · Jesus Maria 60 km · Santa Anita - Los Ficus 62 km · Huacho 63 km

Peru travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
220 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$9,684
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
8.6
per 100k, 2021
Road deaths
13.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 519
Religion
Catholic 76%Evangelical Christian 16%no religion 5%other religions 3%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chancay (-11.5714°, -77.2672°, elevation 34 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).