Vega Baja weather in December

In December, Vega Baja sees average daytime highs of 27°C and overnight lows near 23°C, with 43 mm of rain across 10.5 wet days and about 10.9 hours of daylight. It is the 10th-warmest and 10th-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 60% 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 Vega Baja's 3rd-clearest and 6th-windiest month. For the whole year in context, see Vega Baja's year-round climate.

Daytime high
27°
10th warmest
Overnight low
23°
5th coldest
Rainfall
43 mm
10.5 wet days
Daylight
10 h 54 min
6:55 AM – 5:49 PM
Cloud cover
41%
3rd clearest
Wind
15 km/h
6th windiest
Solar energy
4.36 kWh/m²
Travel score
6.7
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 Vega Baja reaches about 27°C in the afternoon and slips back to 23°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 29°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)
12823
22823
32823
42823
52823
62823
72823
82823
92823
102823
112823
122823
132723
142723
152723
162723
172723
182723
192723
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723
312722

How December really feels in Vega Baja

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.

Vega Baja weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°378.7117.0
Feb27° / 22°317.511.47.1
Mar28° / 22°539.511.96.7
Apr28° / 23°941312.45.7
May29° / 24°14117.412.94.6
Jun30° / 25°7713.413.14.5
Jul30° / 25°7214.7134.4
Aug30° / 25°9018.412.64.0
Sep30° / 25°14021.912.13.6
Oct29° / 25°12620.811.64.0
Nov28° / 24°10617.311.15.1
Dec27° / 23°4310.510.96.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17822
27921
38020
48020
58020
68020
78119
88119
98119
108119
118218
128218
138119
148119
158119
168119
178119
188119
198119
208119
218218
228218
238317
248317
258317
268416
278515
288515
298515
308515
318614

Chance of precipitation in December

Any precipitation

Vega Baja gets around 43 mm of rain over 10.5 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 34% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
239
338
438
537
636
736
835
935
1034
1133
1233
1333
1432
1532
1632
1732
1832
1933
2033
2133
2233
2333
2433
2532
2632
2732
2832
2932
3032
3132

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1225721
2226711
3227701
4328690
5329680
6329680
7330670
8331660
9332650
10333640
11334630
12335620
13336610
14337600
15338590
16339580
17340570
18341560
19342550
20343540
21344530
22346510
23447490
24448480
25450460
26451450
27453430
28454420
29455410
30456400
31457390

Wind in December

Winds average 15 km/h in December.

Across December, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

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 6:46 AM to 7:02 AM, and sunset from 5:44 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:465:44
211.06:475:45
311.06:475:45
411.06:485:45
510.96:495:45
610.96:495:45
710.96:505:46
810.96:505:46
910.96:515:46
1010.96:515:47
1110.96:525:47
1210.96:535:47
1310.96:535:48
1410.96:545:48
1510.96:545:48
1610.96:555:49
1710.96:555:49
1810.96:565:49
1910.96:565:50
2010.96:575:50
2110.96:575:51
2210.96:585:51
2310.96:585:52
2410.96:595:52
2510.96:595:53
2610.97:005:53
2710.97:005:54
2810.97:005:54
2910.97:015:55
3010.97:015:55
3110.97:025:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.36 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 6.55 kWh/m² in June across the year — December's 4.36 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
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
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in December

Hazard calendar for Vega Baja

In seasonPeak

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

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

Vega Baja 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 Vega Baja?

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

6.7
Sightseeing
3rd-best month of the year
6.9
Beach & pool
4th-best month of the year

December is a reasonable time to visit Vega Baja for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Vega Baja in December

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

In December, Vega Baja sees daytime highs around 27°C and nights near 23°C. Pack light clothes. Worth having: rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Vega Baja in December

The nearest coast averages about 27°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 20 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
May27Warm
Jun28Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Vega Baja 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 Vega Baja peaks around April 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very 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 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Vega Baja 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 Vega Baja is worst in July — around 24 µg/m³ PM2.5 (moderate), about 4.8× the cleanest month (January, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1324 µg/m³Jan 105 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb7Good
Mar7Good
Apr8Good
May14Moderate
Jun23Moderate
Jul24Moderate
Aug20Moderate
Sep15Moderate
Oct15Moderate
Nov7Good
Dec5Good
Location & terrain

Where is Vega Baja?

Vega Baja sits at 18.4°N, 66.4°W, 10 m above sea level, in Puerto Rico. The nearest listed city is Manatí, 11 km away.

CandelariaLevittownBayamónCatañoSan JuanGuaynabo

Topography around Vega Baja

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

Within 3 km, the terrain around Vega Baja has only modest variations in elevation — a maximum elevation change of 127 m around an average of 30 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 472 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,307 m.

The land around Vega Baja is covered by trees (48%) and artificial surfaces (23%) within 3 km, trees (47%) and water (35%) within 16 km, and water (50%) and trees (39%) within 80 km.

3 km
127 m
16 km
472 m
80 km
1,307 m
treesgrasslandartificial surfacesbare terrainwaterwetland
December weather nearby: Manatí 11 km · Barceloneta 16 km · Candelaria 19 km · Levittown 22 km · Bayamón 25 km · Cataño 28 km · San Juan 30 km · Guaynabo 31 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 Vega Baja (18.4444°, -66.3877°, elevation 10 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).