Weslaco weather in December

In December, Weslaco sees average daytime highs of 73°F and overnight lows near 54°F, with 1.3 in of precipitation across 5.4 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 75°F in the first days to 71°F by the end. The sky is clear or mostly clear about 37% 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 Weslaco's 11th-clearest and 9th-windiest month. For the whole year in context, see Weslaco's year-round climate.

Daytime high
73°
11th warmest
Overnight low
54°
2nd coldest
Precipitation
1.3 in
5.4 wet days
Daylight
10 h 24 min
7:17 AM – 5:39 PM
Cloud cover
56%
11th clearest
Wind
10 mph
9th windiest
Solar energy
2.99 kWh/m²
Travel score
7.5
out of 10

Weslaco is city in Hidalgo County, Texas, United States.

Density
1,030/km²
people per km²
Founded
1919

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 75°F in the first days to 71°F by the end.

A typical December day in Weslaco reaches about 73°F in the afternoon and slips back to 54°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 59°F and 84°F. Set against its neighbours, December runs about 6°F cooler than November and on par with January.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17657
27556
37556
47556
57556
67456
77456
87455
97455
107455
117455
127355
137354
147354
157354
167354
177354
187254
197253
207253
217253
227253
237253
247153
257153
267153
277153
287152
297152
307152
317152

How December really feels in Weslaco

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
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.

Weslaco 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 (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan72° / 53°1.14.810.57.4
Feb76° / 56°1.04.811.17.7
Mar81° / 62°1.55.511.87.0
Apr87° / 68°1.75.512.65.3
May91° / 73°2.16.913.33.8
Jun95° / 77°2.17.713.62.7
Jul97° / 78°2.2713.52.3
Aug97° / 78°1.77.712.92.1
Sep92° / 75°3.61312.23.2
Oct87° / 68°2.57.211.45.3
Nov79° / 60°1.56.210.77.4
Dec73° / 54°1.35.410.47.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25545
35446
45347
55248
65149
75149
85050
94951
105050
114951
125050
135050
145050
155149
165149
175149
185149
195149
205149
215050
225050
235050
244951
254951
264852
274852
284753
294753
304753
314753

Chance of precipitation in December

Any precipitation

Weslaco gets around 1.3 in of rain and snow over 5.4 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 17% and peaks near 18% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
116
216
316
416
516
616
716
816
916
1017
1117
1217
1317
1417
1517
1617
1718
1818
1918
2018
2118
2218
2318
2418
2518
2618
2718
2818
2918
3017
3117

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1431617213
2441617203
3451517203
4461517203
5471517193
6471417193
7481417192
8491416182
9511316182
10511316182
11531216172
12531216172
13541216162
14551215162
15561215161
16571215151
17571215151
18581215141
19581215141
20591215131
21591215131
22601215121
23601215121
24591316111
25591316111
26601316101
27611315101
28601415101
29601415101
30601415101
3161141591

Wind in December

Winds average 10 mph in December.

Across December, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light 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 7:07 AM to 7:24 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)
110.57:075:36
210.57:085:36
310.57:095:36
410.47:095:36
510.47:105:36
610.47:115:37
710.47:115:37
810.47:125:37
910.47:135:37
1010.47:135:37
1110.47:145:38
1210.47:155:38
1310.47:155:38
1410.47:165:39
1510.47:165:39
1610.47:175:39
1710.47:185:40
1810.47:185:40
1910.47:195:40
2010.47:195:41
2110.47:205:41
2210.47:205:42
2310.47:215:42
2410.47:215:43
2510.47:215:43
2610.47:225:44
2710.47:225:44
2810.47:235:45
2910.47:235:45
3010.47:235:46
3110.47:245:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.99 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.99 kWh/m² to a high of 6.73 kWh/m² in July across the year — December's 2.99 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.1Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.0Moderate
83.0Moderate
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

Is December a good time to visit Weslaco?

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
9th-best month of the year

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

What to pack for Weslaco in December

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

In December, Weslaco sees daytime highs around 73°F and nights near 54°F. Worth packing: light clothes. About 5 days see rain.

light clothes

UV index in Weslaco 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 Weslaco peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highExtremeVery highHighJun 21UV 12Dec 22UV 5
UV index (midday)Level
Jan5Moderate
Feb7High
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Weslaco 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 Weslaco is worst in July — around 26 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1625 µg/m³Nov 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr13Moderate
May20Moderate
Jun21Moderate
Jul26Moderate
Aug19Moderate
Sep12Moderate
Oct8Good
Nov7Good
Dec9Good
Location & terrain

Where is Weslaco?

Weslaco sits at 26.2°N, 98.0°W, 79 ft above sea level, in United States. The nearest listed city is Donna, 3.7 mi away.

Topography around Weslaco

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Weslaco.

Within 2 miles, the terrain around Weslaco has only modest variations in elevation — a maximum elevation change of 59 ft around an average of 79 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 167 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 735 ft.

The land around Weslaco is covered by artificial surfaces (42%) and trees (29%) within 2 miles, cropland (49%) and grassland (20%) within 10 miles, and cropland (40%) and grassland (24%) within 50 miles.

2 miles
59 ft
10 miles
167 ft
50 miles
735 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Donna 3.7 mi · Mercedes 5.0 mi · Alamo 8.1 mi · San Juan 11 mi · Pharr 12 mi · Ciudad Río Bravo 14 mi · Edinburg 14 mi · McAllen 15 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 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 Weslaco (26.1595°, -97.9908°, elevation 79 ft), 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. 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).