Caguas weather in December

In December, Caguas sees average daytime highs of 27°C and overnight lows near 22°C, with 59 mm of rain across 16.5 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 44% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 hours at the start of December to 10 h 54 min by month's end. Set against the rest of the year, December is Caguas's 3rd-clearest and 7th-windiest month. For the whole year in context, see Caguas's year-round climate.

Daytime high
27°
10th warmest
Overnight low
22°
5th coldest
Rainfall
59 mm
16.5 wet days
Daylight
10 h 54 min
6:53 AM – 5:48 PM
Cloud cover
47%
3rd clearest
Wind
11 km/h
7th windiest
Solar energy
4.39 kWh/m²
Travel score
5.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical December day in Caguas reaches about 27°C in the afternoon and slips back to 22°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52723
62723
72722
82722
92722
102722
112722
122722
132722
142722
152722
162722
172722
182722
192722
202722
212722
222722
232722
242722
252722
262722
272722
282722
292722
302722
312722

How December really feels in Caguas

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Caguas weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 22°4915.7116.0
Feb27° / 21°391311.46.2
Mar27° / 22°5514.811.96.0
Apr28° / 22°8717.712.45.3
May28° / 23°14221.912.84.2
Jun29° / 24°9920.813.14.0
Jul29° / 24°11021.8133.9
Aug30° / 25°1272412.63.6
Sep29° / 24°16825.212.13.4
Oct29° / 24°15624.911.63.6
Nov28° / 23°12422.311.14.5
Dec27° / 22°5916.510.95.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 31% of December, with mostly cloudy or overcast conditions the remaining 25%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27228
37228
47327
57327
67426
77525
87525
97525
107525
117525
127624
137525
147525
157624
167624
177624
187624
197525
207525
217525
227525
237525
247525
257624
267624
277723
287822
297822
307822
317822

Chance of precipitation in December

Any precipitation

Caguas gets around 59 mm of rain over 16.5 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 54% and peaks near 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
162
261
360
459
558
657
757
856
955
1055
1154
1253
1353
1452
1552
1651
1751
1851
1951
2051
2151
2251
2351
2451
2551
2651
2751
2851
2952
3052
3152

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1219772
2220762
3221752
4221761
5221761
6222751
7222751
8222751
9223741
10223741
11224740
12224740
13225730
14226720
15226720
16227710
17228700
18229690
19230680
20231670
21232660
22233650
23334630
24335620
25336610
26337600
27338590
28339580
29341560
30342550
31343540

Wind in December

Winds average 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 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
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 11 hours at the start of December to 10 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:44 AM to 7:00 AM, and sunset from 5:43 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:445:43
211.06:455:44
311.06:465:44
411.06:465:44
511.06:475:44
611.06:475:44
710.96:485:45
810.96:495:45
910.96:495:45
1010.96:505:46
1110.96:505:46
1210.96:515:46
1310.96:515:47
1410.96:525:47
1510.96:525:47
1610.96:535:48
1710.96:545:48
1810.96:545:49
1910.96:555:49
2010.96:555:49
2110.96:565:50
2210.96:565:50
2310.96:565:51
2410.96:575:51
2510.96:575:52
2610.96:585:52
2710.96:585:53
2810.96:595:53
2910.96:595:54
3010.96:595:54
3110.97:005:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.39 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 6.55 kWh/m² in June across the year — December's 4.39 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in December

Hazard calendar for Caguas

In seasonPeak

None of Caguas's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Caguas sits in the Atlantic hurricane belt; the season peaks August–October.

Caguas sees seasonal dust haze (July), heaviest in July.

Atlantic hurricane
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Caguas?

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

5.8
Sightseeing
4th-best month of the year
5.8
Beach & pool
4th-best month of the year

December is a reasonable time to visit Caguas for sightseeing.

What to pack for Caguas in December

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

In December, Caguas sees daytime highs around 27°C and nights near 22°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Caguas in December

The nearest coast averages about 28°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 41 km away) is warmest in September at about 29°C and coldest in February near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb26Warm
Mar26Warm
Apr27Warm
May28Warm
Jun28Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Caguas in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caguas peaks around April 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 13UV 13Dec 16UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar12Extreme
Apr13Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Caguas 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 Caguas is worst in July — around 25 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (January, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1125 µg/m³Jan 15 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb7Good
Mar7Good
Apr9Good
May14Moderate
Jun24Moderate
Jul25Moderate
Aug20Moderate
Sep15Moderate
Oct15Moderate
Nov8Good
Dec5Good
Location & terrain

Where is Caguas?

Caguas sits at 18.2°N, 66.0°W, 65 m above sea level, in Puerto Rico. The nearest listed city is Trujillo Alto, 14 km away.

CayeyCarolinaBayamónCatañoHumacaoCandelaria

Topography around Caguas

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

Within 3 km, the terrain around Caguas has only modest variations in elevation — a maximum elevation change of 203 m around an average of 92 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 896 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,308 m.

The land around Caguas is covered by artificial surfaces (58%) and trees (36%) within 3 km, trees (78%) within 16 km, and water (63%) and trees (29%) within 80 km.

3 km
203 m
16 km
896 m
80 km
1,308 m
treesgrasslandartificial surfaceswater
December weather nearby: Trujillo Alto 14 km · Guaynabo 15 km · Cayey 18 km · Carolina 19 km · Bayamón 22 km · Cataño 24 km · Humacao 25 km · Candelaria 25 km

Puerto Rico travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 78% of US
price level, 2025
GDP per capita
$40,620
2025
Happiness
7.0 / 10
World Happiness, 2015
Safe drinking water
99%
of population, 2024
Homicide rate
14.6
per 100k, 2023
Income group
High
World Bank
Religion
Roman Catholic 56%Protestant 33%none 7%other 2%

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 Caguas (18.2341°, -66.0485°, elevation 65 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).