Salina Cruz weather in December

In December, Salina Cruz sees average daytime highs of 31°C and overnight lows near 21°C, with 4 mm of rain across 0.8 wet days and about 11.1 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 77% of the time in December, and the air most often feels humid.

Daylight stretches from about 11 h 06 min at the start of December to 11 hours by month's end. Set against the rest of the year, December is Salina Cruz's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Salina Cruz's year-round climate.

Daytime high
31°
11th warmest
Overnight low
21°
3rd coldest
Rainfall
4 mm
0.8 wet days
Daylight
11 hours
6:46 AM – 5:48 PM
Cloud cover
22%
3rd clearest
Wind
19 km/h
3rd windiest
Solar energy
5.2 kWh/m²
Travel score
6.2
out of 10

Salina Cruz is municipal seat of Salina Cruz, State of Oaxaca, Mexico.

Density
744/km²
people per km²
Founded
1522

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 31°C through the month.

A typical December day in Salina Cruz reaches about 31°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113121
123121
133121
143121
153121
163121
173121
183121
193121
203121
213121
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How December really feels in Salina Cruz

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.

Salina Cruz weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°30.811.16.5
Feb31° / 21°30.811.55.7
Mar33° / 22°4111.94.8
Apr34° / 24°61.712.43.8
May34° / 25°679.912.73.0
Jun33° / 25°23317.812.92.9
Jul34° / 25°12211.612.93.0
Aug34° / 25°16314.612.52.8
Sep32° / 25°20617.412.13.1
Oct32° / 24°848.611.64.1
Nov32° / 23°151.711.25.3
Dec31° / 21°40.811.16.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% 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 14%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18515
28713
38713
48713
58713
68713
78812
88812
98812
108812
118812
128812
138713
148614
158614
168614
178614
188515
198515
208515
218515
228515
238515
248515
258515
268515
278515
288614
298614
308614
318713

Chance of precipitation in December

Any precipitation

Salina Cruz gets around 4 mm of rain over 0.8 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 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
34
44
53
63
73
83
93
103
113
123
133
143
153
163
173
183
193
203
213
223
233
242
252
262
272
282
291
301
311

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1318392813
2318392812
3318402712
4318402711
5318402811
6319402810
7319402810
8319402810
941940289
1041940299
1141940299
1241940298
1351939298
1451939298
1551939298
1661939288
1762039287
1862040287
1962040277
2062041267
2162041267
2262042266
2362043256
2462043256
2562044255
2662044245
2762044245
2862144245
2972144235
3072244234
3172244234

Wind in December

Winds average 19 km/h in December.

Across December, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 06 min at the start of December to 11 hours 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 6:52 AM, and sunset from 5:44 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:375:44
211.16:385:44
311.16:385:44
411.16:395:44
511.16:405:45
611.16:405:45
711.16:415:45
811.16:415:45
911.16:425:46
1011.16:425:46
1111.16:435:46
1211.16:445:47
1311.06:445:47
1411.06:455:47
1511.06:455:48
1611.06:465:48
1711.06:465:49
1811.06:475:49
1911.06:475:49
2011.06:485:50
2111.06:485:50
2211.06:495:51
2311.06:495:51
2411.06:505:52
2511.06:505:52
2611.06:505:53
2711.06:515:53
2811.06:515:54
2911.06:525:54
3011.06:525:55
3111.06:525:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.2 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 5.2 kWh/m² to a high of 7.02 kWh/m² in April across the year — December's 5.2 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.3Bright
315.3Bright
Planning a trip in December

Hazard calendar for Salina Cruz

In seasonPeak

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

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

Salina Cruz's monsoon runs June–September, when most of the year's rain falls.

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

Is December a good time to visit Salina Cruz?

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

6.2
Sightseeing
2nd-best month of the year
8.8
Beach & pool
2nd-best month of the year

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

What to pack for Salina Cruz in December

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

In December, Salina Cruz sees daytime highs around 31°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Salina Cruz 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 offshore is warmest in August at about 30°C and coldest in January near 26°C.

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

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr28Tropical
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov27Warm
Dec27Warm

UV index in Salina Cruz in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Salina Cruz peaks around April 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 15UV 12Dec 19UV 8
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Salina Cruz 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 Salina Cruz is worst in May — around 32 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (November, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1531 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar14Moderate
Apr25Moderate
May32Moderate
Jun21Moderate
Jul27Moderate
Aug20Moderate
Sep18Moderate
Oct11Good
Nov8Good
Dec8Good
Location & terrain

Where is Salina Cruz?

Salina Cruz sits at 16.2°N, 95.2°W, 8 m above sea level, in Mexico. The nearest listed city is Santo Domingo Tehuantepec, 17 km away.

Topography around Salina Cruz

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

Within 3 km, the terrain around Salina Cruz has only modest variations in elevation — a maximum elevation change of 214 m around an average of 36 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 691 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,791 m.

The land around Salina Cruz is covered by artificial surfaces (33%) and water (27%) within 3 km, water (44%) and trees (21%) within 16 km, and water (35%) and trees (34%) within 80 km.

3 km
214 m
16 km
691 m
80 km
2,791 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
December weather nearby: Santo Domingo Tehuantepec 17 km · Heroica Ciudad de Juchitán de Zaragoza 34 km · Ixtepec 44 km · Matías Romero Avendaño 80 km · Crucecita 110 km · Arriaga 138 km · Miahuatlán de Porfirio Díaz 151 km · Tonalá 154 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 Salina Cruz (16.1754°, -95.1942°, elevation 8 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).