Rosarito weather in December

In December, Rosarito sees average daytime highs of 16°C and overnight lows near 12°C, with 44 mm of rain across 5.2 wet days and about 9.9 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 53% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 hours at the start of December to 9 h 54 min by month's end. Set against the rest of the year, December is Rosarito's 9th-clearest and 9th-windiest month. For the whole year in context, see Rosarito's year-round climate.

Daytime high
16°
9th warmest
Overnight low
12°
3rd coldest
Rainfall
44 mm
5.2 wet days
Daylight
9 h 54 min
6:48 AM – 4:41 PM
Cloud cover
41%
9th clearest
Wind
11 km/h
9th windiest
Solar energy
3.2 kWh/m²
Travel score
6.0
out of 10

Rosarito is municipal seat of Rosarito, State of Baja California, Mexico.

Founded
1885

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 16°C through the month.

A typical December day in Rosarito reaches about 16°C in the afternoon and slips back to 12°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 19°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11713
21713
31713
41713
51713
61713
71712
81712
91712
101712
111612
121612
131612
141612
151612
161612
171612
181612
191612
201612
211612
221612
231612
241612
251612
261611
271611
281611
291611
301611
311611

Rosarito weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan16° / 12°565.510.15.9
Feb16° / 12°696.310.85.5
Mar16° / 12°435.211.85.8
Apr17° / 13°183.212.86.6
May18° / 14°71.513.67.3
Jun19° / 16°10.214.18.1
Jul21° / 18°10.213.98.6
Aug22° / 19°00.113.29.0
Sep22° / 18°30.512.28.8
Oct21° / 17°132.111.28.2
Nov19° / 14°203.110.37.4
Dec16° / 12°445.29.96.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 33%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26832
36832
46733
56733
66733
76733
86634
96634
106733
116733
126733
136733
146733
156733
166733
176733
186733
196733
206733
216733
226733
236634
246634
256634
266634
276634
286535
296535
306535
316436

Chance of precipitation in December

Any precipitation

Rosarito gets around 44 mm of rain over 5.2 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 17% and peaks near 18% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
115
215
315
416
516
616
716
816
917
1017
1117
1218
1318
1418
1518
1618
1718
1818
1918
2018
2118
2218
2318
2418
2517
2617
2718
2818
2918
3018
3118

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
18614
28713
38713
48713
58812
68812
78812
88911
98911
109010
11919
12919
13928
14937
15946
16946
17955
18955
19964
20964
21973
22973
23973
24982
25982
26982
27982
28982
29982
30982
31973

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
211calm
311calm
411calm
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 10 hours at the start of December to 9 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 6:37 AM to 6:54 AM, and sunset from 4:39 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.06:374:39
210.06:384:39
310.06:394:39
410.06:394:39
510.06:404:39
610.06:414:39
710.06:424:39
89.96:424:39
99.96:434:39
109.96:444:39
119.96:454:40
129.96:454:40
139.96:464:40
149.96:474:40
159.96:474:41
169.96:484:41
179.96:484:41
189.96:494:42
199.96:494:42
209.96:504:42
219.96:504:43
229.96:514:43
239.96:514:44
249.96:524:44
259.96:524:45
269.96:534:45
279.96:534:46
289.96:534:47
299.96:544:47
309.96:544:48
319.96:544:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.2 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.2 kWh/m² to a high of 7.85 kWh/m² in June across the year — December's 3.2 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.3Moderate
43.2Moderate
53.2Moderate
63.2Moderate
73.2Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.1Moderate
123.1Moderate
133.1Moderate
143.1Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.1Moderate
193.1Moderate
203.1Moderate
213.1Moderate
223.1Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.2Moderate
293.3Moderate
303.3Moderate
313.3Moderate
Planning a trip in December

Is December a good time to visit Rosarito?

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

6.0
Sightseeing
9th-best month of the year
1.0
Beach & pool
9th-best month of the year

December is a reasonable time to visit Rosarito for sightseeing.

What to pack for Rosarito in December

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

In December, Rosarito sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer. About 5 days see rain.

a warm layer

Sea temperature near Rosarito in December

The nearest coast averages about 16°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 August at about 21°C and coldest in February near 15°C.

It's comfortable for a long swim from Jul 18 to Sep 29 — about 2.4 months when the water holds above 20°C.

14°16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Cool
Mar16Cool
Apr16Cool
May17Cool
Jun18Cool
Jul20Refreshing
Aug21Refreshing
Sep21Refreshing
Oct19Cool
Nov18Cool
Dec16Cool

UV index in Rosarito in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosarito peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 17UV 3
UV index (midday)Level
Jan4Moderate
Feb5Moderate
Mar5High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Rosarito 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 Rosarito is worst in October — around 33 µg/m³ PM2.5 (moderate), about 5.4× the cleanest month (May, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 1631 µg/m³May 176 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr9Good
May6Good
Jun9Good
Jul8Good
Aug9Good
Sep16Moderate
Oct33Moderate
Nov13Moderate
Dec17Moderate
Location & terrain

Where is Rosarito?

Rosarito sits at 32.4°N, 117.0°W, 46 m above sea level, in Mexico. The nearest listed city is Pórticos de San Antonio, 9.0 km away.

Topography around Rosarito

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

Within 3 km, the terrain around Rosarito has only modest variations in elevation — a maximum elevation change of 174 m around an average of 58 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 725 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,966 m.

The land around Rosarito is covered by artificial surfaces (39%) and grassland (37%) within 3 km, water (45%) and grassland (30%) within 16 km, and water (38%) and shrubs (27%) within 80 km.

3 km
174 m
16 km
725 m
80 km
1,966 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Pórticos de San Antonio 9.0 km · Villa del Prado 2da Sección 10 km · La Joya 10 km · Las Delicias 11 km · Tijuana 16 km · Terrazas del Valle 25 km · Imperial Beach 26 km · Chula Vista 31 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Rosarito (32.3604°, -117.0464°, elevation 46 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).