Del Rio weather in December

In December, Del Rio sees average daytime highs of 65°F and overnight lows near 44°F, with 0.9 in of rain across 3.8 wet days and about 10.2 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 67°F in the first days to 64°F by the end. The sky is clear or mostly clear about 51% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 18 min at the start of December to 10 h 06 min by month's end. Set against the rest of the year, December is Del Rio's 8th-clearest and 11th-windiest month. For the whole year in context, see Del Rio's year-round climate.

Daytime high
65°
11th warmest
Overnight low
44°
2nd coldest
Rainfall
0.9 in
3.8 wet days
Daylight
10 h 06 min
7:36 AM – 5:44 PM
Cloud cover
46%
8th clearest
Wind
8 mph
11th windiest
Solar energy
3.13 kWh/m²
Travel score
7.1
out of 10

Del Rio is city and the county seat of Val Verde County, Texas, United States.

Density
691/km²
people per km²

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 67°F in the first days to 64°F by the end.

A typical December day in Del Rio reaches about 65°F in the afternoon and slips back to 44°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 53°F and 76°F. Set against its neighbours, December runs about 7°F cooler than November and on par with January.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16847
26847
36747
46747
56746
66746
76646
86646
96645
106645
116645
126545
136545
146544
156544
166544
176544
186544
196544
206444
216444
226443
236443
246443
256443
266443
276443
286443
296443
306443
316443

How December really feels in Del Rio

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.

Del Rio weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan65° / 44°0.93.510.37.1
Feb70° / 48°0.9410.97.6
Mar77° / 55°1.55.211.87.7
Apr85° / 62°1.75.112.76.2
May91° / 70°2.57.613.43.9
Jun96° / 76°1.5613.82.5
Jul97° / 78°1.65.513.72.1
Aug98° / 78°1.64.713.12.1
Sep91° / 72°2.67.512.23.9
Oct83° / 63°2.2611.36.6
Nov73° / 52°1.24.410.57.9
Dec65° / 44°0.93.810.27.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35842
45842
55941
65842
75842
85941
95941
106040
116040
126139
136238
146238
156238
166337
176436
186436
196337
206337
216337
226238
236139
246040
255941
265941
275743
285743
295743
305743
315743

Chance of precipitation in December

Any precipitation

Del Rio gets around 0.9 in of rain over 3.8 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 12% and peaks near 13% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
113
213
313
413
513
613
713
813
912
1012
1112
1212
1312
1412
1511
1611
1711
1811
1911
2011
2112
2212
2312
2412
2512
2612
2712
2812
2912
3012
3111

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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1831061
284961
384961
485861
587850
687850
788750
888750
989740
1089740
1190640
1291630
1391630
1491630
1592530
1693520
1793520
1893520
1993520
2094420
2194420
2294420
2394420
2494420
2594420
2694420
2794420
2894420
2994420
3094420
3194420

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 18 min at the start of December to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:26 AM to 7:42 AM, and sunset from 5:41 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.37:265:41
210.27:265:41
310.27:275:41
410.27:285:41
510.27:295:41
610.27:295:41
710.27:305:41
810.27:315:42
910.27:315:42
1010.27:325:42
1110.27:335:42
1210.17:335:42
1310.17:345:43
1410.17:355:43
1510.17:355:43
1610.17:365:44
1710.17:365:44
1810.17:375:44
1910.17:385:45
2010.17:385:45
2110.17:395:46
2210.17:395:46
2310.17:395:47
2410.17:405:47
2510.17:405:48
2610.17:415:48
2710.17:415:49
2810.17:415:49
2910.17:425:50
3010.17:425:50
3110.17:425:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 3.13 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 6.87 kWh/m² in July across the year — December's 3.13 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
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
233.1Moderate
243.1Moderate
253.1Moderate
263.2Moderate
273.2Moderate
283.2Moderate
293.2Moderate
303.2Moderate
313.2Moderate
Planning a trip in December

Is December a good time to visit Del Rio?

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

7.1
Sightseeing
4th-best month of the year
2.7
Beach & pool
11th-best month of the year

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

What to pack for Del Rio in December

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

In December, Del Rio sees daytime highs around 65°F and nights near 44°F. Worth packing: a warm layer. About 4 days see rain.

a warm layer

UV index in Del Rio in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Del Rio peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 4 (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 18UV 4
UV index (midday)Level
Jan5Moderate
Feb6High
Mar8Very high
Apr10Very high
May10Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct7High
Nov5Moderate
Dec4Moderate

Air quality in Del Rio 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 Del Rio is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (January, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1516 µg/m³Jan 166 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar7Good
Apr8Good
May13Moderate
Jun14Moderate
Jul17Moderate
Aug12Moderate
Sep10Good
Oct7Good
Nov7Good
Dec6Good
Location & terrain

Where is Del Rio?

Del Rio sits at 29.4°N, 100.9°W, 968 ft above sea level, in United States. The nearest listed city is Ciudad Acuña, 4.3 mi away.

Topography around Del Rio

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

Within 2 miles, the terrain around Del Rio has only modest variations in elevation — a maximum elevation change of 200 ft around an average of 981 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 489 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,773 ft.

The land around Del Rio is covered by artificial surfaces (39%), trees (23%) and shrubs (23%) within 2 miles, shrubs (74%) within 10 miles, and shrubs (78%) within 50 miles.

2 miles
200 ft
10 miles
489 ft
50 miles
3,773 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Ciudad Acuña 4.3 mi · Piedras Negras 51 mi · Eagle Pass 51 mi · Nava 66 mi · Uvalde 68 mi · Allende 71 mi · Nueva Rosita 101 mi · Sabinas 105 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 Del Rio (29.3627°, -100.8968°, elevation 968 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).