Del Rio weather in May

In May, Del Rio sees average daytime highs of 91°F and overnight lows near 70°F, with 2.5 in of rain across 7.6 wet days and about 13.4 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 89°F in the first days to 94°F by the end. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels muggy.

Daylight stretches from about 13 h 06 min at the start of May to 13 h 42 min by month's end. Set against the rest of the year, May is Del Rio's 12th-clearest and 2nd-windiest month. For the whole year in context, see Del Rio's year-round climate.

Daytime high
91°
5th warmest
Overnight low
70°
8th coldest
Rainfall
2.5 in
7.6 wet days
Daylight
13 h 30 min
5:56 AM – 7:24 PM
Cloud cover
48%
12th clearest
Wind
11 mph
2nd windiest
Solar energy
6.17 kWh/m²
Travel score
3.9
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 89°F in the first days to 94°F by the end.

A typical May day in Del Rio reaches about 91°F in the afternoon and slips back to 70°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 82°F and 100°F. Set against its neighbours, May runs about 6°F warmer than April and about 5°F cooler than June.

60°80°100°151015202531
Avg high (°F)Avg low (°F)
18866
28967
38967
48967
58967
68968
78968
89068
99068
109069
119069
129069
139169
149170
159170
169170
179170
189171
199171
209271
219271
229271
239272
249272
259372
269372
279373
289373
299473
309473
319473

How May really feels in Del Rio

Once humidity and wind are folded in, May averages 24 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
24
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Del Rio weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 2nd-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46238
56238
66238
76238
86238
96238
106238
116238
126238
136238
146238
156238
166139
176139
186040
196040
206139
216040
226139
236139
246238
256238
266337
276436
286436
296535
306634
316634

Chance of precipitation in May

Any precipitation

Del Rio gets around 2.5 in of rain over 7.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
120
220
321
421
521
622
722
823
923
1024
1124
1224
1324
1425
1525
1625
1725
1826
1926
2026
2126
2226
2326
2426
2526
2625
2725
2825
2925
3025
3124

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1351522262
2331423272
3321423293
4301324313
5281324323
6261225343
7241225354
8231226364
9211226374
10201126384
11191127394
12181127395
13161128395
14151128405
15151129406
16141029416
17131029426
18121029427
1911929438
2010928448
219828469
229828479
2387274810
2477274910
2567265011
2657265012
2746255312
2836255313
2936245314
3026245414
3126235415

Wind in May

Winds average 11 mph in May.

Across May, daily wind ranges from about 11 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1911light breeze
2011light breeze
2111light breeze
2211light breeze
2311light breeze
2411light breeze
2511light breeze
2611light breeze
2711light breeze
2811light breeze
2911light breeze
3011light breeze
3111light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 06 min at the start of May to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over May. Sunrise moves from 6:07 AM to 5:49 AM, and sunset from 7:14 PM to 7:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:077:14
213.16:067:15
313.26:067:16
413.26:057:16
513.26:047:17
613.26:037:17
713.36:027:18
813.36:017:19
913.36:017:19
1013.36:007:20
1113.45:597:21
1213.45:587:21
1313.45:587:22
1413.45:577:23
1513.45:567:23
1613.55:567:24
1713.55:557:24
1813.55:557:25
1913.55:547:26
2013.55:547:26
2113.65:537:27
2213.65:537:28
2313.65:527:28
2413.65:527:29
2513.65:517:29
2613.75:517:30
2713.75:507:30
2813.75:507:31
2913.75:507:32
3013.75:497:32
3113.75:497:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.17 kWh/m².

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 — May's 6.17 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.4Intense
296.4Intense
306.4Intense
316.5Intense
Planning a trip in May

Is May a good time to visit Del Rio?

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

3.9
Sightseeing
8th-best month of the year
6.7
Beach & pool
5th-best month of the year

May is a weaker month for outdoor sightseeing in Del Rio. The water and warmth also suit a beach or pool day.

What to pack for Del Rio in May

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

In May, Del Rio sees daytime highs around 91°F and nights near 70°F. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Del Rio in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).