Valle Hermoso weather in December

In December, Valle Hermoso sees average daytime highs of 23°C and overnight lows near 13°C, with 31 mm of precipitation across 5.6 wet days and about 10.4 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 35% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of December to 10 h 24 min by month's end. Set against the rest of the year, December is Valle Hermoso's 11th-clearest and 8th-windiest month. For the whole year in context, see Valle Hermoso's year-round climate.

Daytime high
23°
11th warmest
Overnight low
13°
2nd coldest
Precipitation
31 mm
5.6 wet days
Daylight
10 h 24 min
7:15 AM – 5:40 PM
Cloud cover
57%
11th clearest
Wind
16 km/h
8th windiest
Solar energy
3.02 kWh/m²
Travel score
7.5
out of 10

Valle Hermoso is municipal seat of Valle Hermoso, State of Tamaulipas, Mexico.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical December day in Valle Hermoso reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62414
72414
82314
92314
102313
112313
122313
132313
142313
152313
162313
172313
182313
192213
202213
212213
222212
232212
242212
252212
262212
272212
282212
292212
302212
312212

How December really feels in Valle Hermoso

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.

Valle Hermoso weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 12°285.310.67.3
Feb24° / 14°224.711.17.7
Mar27° / 17°34611.87.2
Apr29° / 20°425.812.65.9
May32° / 23°466.913.24.5
Jun34° / 25°599.713.63.3
Jul34° / 25°638.513.43.0
Aug35° / 25°5310.212.92.7
Sep33° / 24°10614.812.23.4
Oct30° / 20°648.811.45.4
Nov26° / 16°406.610.77.3
Dec23° / 13°315.610.47.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25347
35248
45248
55149
65149
75050
85050
95050
105050
115050
125050
135149
145149
155248
165347
175248
185347
195248
205347
215248
225149
235050
245050
255050
264753
274753
284654
294654
304654
314555

Chance of precipitation in December

Any precipitation

Valle Hermoso gets around 31 mm of rain and snow over 5.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 18% and peaks near 19% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
117
217
317
417
517
617
717
817
917
1017
1117
1218
1318
1417
1517
1617
1717
1817
1918
2018
2118
2218
2318
2419
2519
2619
2719
2819
2919
3019
3119

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1381516256
2381515256
3391515256
4401515255
5411515255
6411515245
7421415245
8431415244
9441415234
10451414234
11461414224
12471414223
13471414213
14481414213
15491414203
16491414202
17511414192
18511414192
19521414182
20521414182
21531414172
22531415162
23531415162
24521515162
25531515152
26531515152
27531515152
28541515142
29531516142
30541516132
31551516131

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 30 min at the start of December to 10 h 24 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 7:06 AM to 7:22 AM, and sunset from 5:36 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.57:065:36
210.57:065:36
310.57:075:37
410.57:085:37
510.57:085:37
610.57:095:37
710.57:105:37
810.47:105:37
910.47:115:38
1010.47:125:38
1110.47:125:38
1210.47:135:38
1310.47:145:39
1410.47:145:39
1510.47:155:39
1610.47:155:40
1710.47:165:40
1810.47:165:40
1910.47:175:41
2010.47:175:41
2110.47:185:42
2210.47:185:42
2310.47:195:43
2410.47:195:43
2510.47:205:44
2610.47:205:44
2710.47:205:45
2810.47:215:45
2910.47:215:46
3010.47:225:46
3110.47:225:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.02 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.02 kWh/m² to a high of 6.72 kWh/m² in July across the year — December's 3.02 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.0Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.0Moderate
303.0Moderate
313.0Moderate
Planning a trip in December

Hazard calendar for Valle Hermoso

In seasonPeak

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

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

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

Is December a good time to visit Valle Hermoso?

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

7.5
Sightseeing
2nd-best month of the year
5.7
Beach & pool
11th-best month of the year

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

What to pack for Valle Hermoso in December

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

In December, Valle Hermoso sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes. About 6 days see rain.

light clothes

Sea temperature near Valle Hermoso in December

The nearest coast averages about 22°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 55 km away) is warmest in September at about 29°C and coldest in February near 19°C.

It's comfortable for a long swim from Mar 6 to Jan 9 — about 10.2 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb19Cool
Mar20Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct27Warm
Nov24Warm
Dec22Refreshing

UV index in Valle Hermoso in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Valle Hermoso peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeExtremeVery highHighJun 21UV 12Dec 23UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Valle Hermoso 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 Valle Hermoso is worst in July — around 34 µg/m³ PM2.5 (moderate), about 4.7× the cleanest month (November, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1934 µg/m³Nov 117 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar11Good
Apr14Moderate
May21Moderate
Jun28Moderate
Jul34Moderate
Aug31Moderate
Sep15Moderate
Oct8Good
Nov7Good
Dec9Good
Location & terrain

Where is Valle Hermoso?

Valle Hermoso sits at 25.7°N, 97.8°W, 16 m above sea level, in Mexico. The nearest listed city is Heroica Matamoros, 38 km away.

Topography around Valle Hermoso

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

Within 3 km, the terrain around Valle Hermoso has only modest variations in elevation — a maximum elevation change of 6 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 19 m; within 80 km, significant variations in elevation — a maximum elevation change of 293 m.

The land around Valle Hermoso is covered by artificial surfaces (41%) and cropland (38%) within 3 km, cropland (90%) within 16 km, and cropland (42%) within 80 km.

3 km
6 m
16 km
19 m
80 km
293 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Heroica Matamoros 38 km · Brownsville 41 km · Ciudad Río Bravo 44 km · Mercedes 54 km · San Benito 54 km · Weslaco 57 km · Harlingen 59 km · Donna 60 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 Valle Hermoso (25.6732°, -97.8127°, elevation 16 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).