Ilo weather in December

In December, Ilo sees average daytime highs of 21°C and overnight lows near 18°C, with 1 mm of rain across 0.2 wet days and about 13 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of December to 13 hours by month's end. Set against the rest of the year, December is Ilo's 10th-clearest and 5th-windiest month. For the whole year in context, see Ilo's year-round climate.

Daytime high
21°
4th warmest
Overnight low
18°
9th coldest
Rainfall
1 mm
0.2 wet days
Daylight
13 hours
5:10 AM – 6:13 PM
Cloud cover
61%
10th clearest
Wind
11 km/h
5th windiest
Solar energy
7.35 kWh/m²
Travel score
7.7
out of 10

Ilo is city in Peru.

Density
181/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 21°C through the month.

A typical December day in Ilo reaches about 21°C in the afternoon and slips back to 18°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 21°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°18°20°23°25°151015202531
Avg high (°C)Avg low (°C)
12017
22017
32017
42017
52017
62017
72018
82018
92018
102018
112018
122018
132018
142018
152018
162118
172118
182118
192118
202118
212118
222118
232118
242119
252119
262119
272119
282119
292119
302119
312119

Ilo weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 20°40.912.97.8
Feb23° / 20°41.212.67.9
Mar22° / 19°10.412.18.1
Apr21° / 18°00.111.68.1
May19° / 16°00.111.27.9
Jun18° / 15°00.1117.3
Jul17° / 14°10.411.16.7
Aug17° / 13°10.111.46.7
Sep17° / 14°00.111.96.9
Oct18° / 15°0012.47.3
Nov19° / 16°00.112.87.6
Dec21° / 18°10.2137.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25545
35545
45347
55347
65347
75248
85248
95149
105050
115050
125050
134951
144951
154951
164753
174753
184654
194654
204555
214357
224258
234159
244159
254060
263961
273862
283862
293763
303664
313664

Chance of precipitation in December

Any precipitation

Ilo gets around 1 mm of rain over 0.2 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 0% and peaks near 2% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
201
211
221
231
241
251
261
271
281
292
302
312

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
164360
261390
359410
456440
553470
651490
748520
844560
941590
1038620
1135650
1232680
1329710
1427730
1524760
1622771
1719801
1817821
1915841
2013861
2111872
2210882
238902
247903
256913
265914
274915
284906
293907
303898
312899

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 hours at the start of December to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:06 AM to 5:17 AM, and sunset from 6:05 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:066:05
213.05:066:05
313.05:066:06
413.05:066:06
513.05:076:07
613.05:076:07
713.05:076:08
813.05:076:09
913.05:086:09
1013.05:086:10
1113.05:086:10
1213.05:096:11
1313.05:096:11
1413.05:096:12
1513.05:106:12
1613.05:106:13
1713.15:106:14
1813.15:116:14
1913.15:116:15
2013.15:126:15
2113.15:126:16
2213.15:136:16
2313.15:136:16
2413.15:146:17
2513.15:146:17
2613.15:156:18
2713.15:156:18
2813.05:166:19
2913.05:166:19
3013.05:176:19
3113.05:176:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.35 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.21 kWh/m² to a high of 7.35 kWh/m² in December across the year — December's 7.35 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.4Intense
47.4Intense
57.4Intense
67.4Intense
77.4Intense
87.4Intense
97.4Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.3Intense
237.2Intense
247.2Intense
257.2Intense
267.2Intense
277.2Intense
287.2Intense
297.2Intense
307.2Intense
317.1Intense
Planning a trip in December

Is December a good time to visit Ilo?

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

7.7
Sightseeing
6th-best month of the year
4.4
Beach & pool
5th-best month of the year

December is one of the better times to visit Ilo for general sightseeing.

What to pack for Ilo in December

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

In December, Ilo sees daytime highs around 21°C and nights near 18°C. Pack sun protection.

sun protection

Sea temperature near Ilo in December

The nearest coast averages about 21°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 22°C and coldest in August near 17°C.

It's comfortable for a long swim from Nov 27 to Apr 28 — about 5 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar22Refreshing
Apr21Refreshing
May19Cool
Jun19Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct18Cool
Nov20Cool
Dec21Refreshing

UV index in Ilo 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 Ilo peaks around February 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 10UV 15Jul 10UV 7
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar13Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul7Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Ilo?

Ilo sits at 17.6°S, 71.3°W, 22 m above sea level, in Peru. The nearest listed city is San Antonio, 64 km away.

TacnaJacobo HunterCiudad SateliteArequipaSelva Alegre

Topography around Ilo

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

Within 3 km, the terrain around Ilo has only modest variations in elevation — a maximum elevation change of 192 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,476 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Ilo is covered by water (40%), bare terrain (30%) and artificial surfaces (27%) within 3 km, water (51%) and bare terrain (46%) within 16 km, and bare terrain (58%) and water (38%) within 80 km.

3 km
192 m
16 km
1,476 m
80 km
3,396 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: San Antonio 64 km · Moquegua 65 km · Mollendo 98 km · Tacna 123 km · Jacobo Hunter 134 km · Ciudad Satelite 135 km · Arequipa 139 km · Selva Alegre 142 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 Ilo (-17.6319°, -71.3411°, elevation 22 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).