Duncanville weather in May

In May, Duncanville sees average daytime highs of 83°F and overnight lows near 65°F, with 4.8 in of rain across 10.2 wet days and about 13.7 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 80°F in the first days to 86°F by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels muggy.

Daylight stretches from about 13 h 18 min at the start of May to 14 hours by month's end. Set against the rest of the year, May is Duncanville's 12th-clearest and 3rd-windiest month. For the whole year in context, see Duncanville's year-round climate.

Daytime high
83°
5th warmest
Overnight low
65°
8th coldest
Rainfall
4.8 in
10.2 wet days
Daylight
13 h 42 min
5:34 AM – 7:14 PM
Cloud cover
54%
12th clearest
Wind
10 mph
3rd windiest
Solar energy
5.8 kWh/m²
Travel score
5.9
out of 10

Duncanville is city in Dallas County, Texas, United States.

Density
1,371/km²
people per km²
Founded
1880

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 80°F in the first days to 86°F by the end.

A typical May day in Duncanville reaches about 83°F in the afternoon and slips back to 65°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 90°F. Set against its neighbours, May runs about 7°F warmer than April and about 7°F cooler than June.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
17960
27960
38061
48061
58062
68062
78062
88163
98163
108163
118264
128264
138264
148265
158365
168365
178365
188366
198466
208466
218467
228467
238567
248568
258568
268568
278669
288669
298669
308769
318770

How May really feels in Duncanville

Once humidity and wind are folded in, May 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

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Duncanville weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan57° / 38°2.770.410.14.4
Feb61° / 42°2.77.20.510.85.4
Mar68° / 49°3.78.90.211.86.6
Apr76° / 56°3.98.2012.87.2
May83° / 65°4.810.2013.75.9
Jun90° / 73°3.28014.14.1
Jul94° / 76°1.65.3013.93.0
Aug94° / 76°2.15.2013.23.1
Sep88° / 69°2.55.9012.25.1
Oct78° / 58°3.87.5011.27.3
Nov67° / 48°3.36.90.110.36.8
Dec58° / 40°3.36.80.29.94.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25347
35347
45248
55248
65149
75149
85149
95050
105149
115149
125149
135149
145149
155248
165248
175149
185248
195248
205248
215347
225347
235347
245347
255446
265446
275446
285446
295545
305545
315644

Chance of precipitation in May

Any precipitation

Duncanville gets around 4.8 in of rain over 10.2 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
333
433
533
634
734
833
933
1033
1132
1232
1332
1431
1531
1630
1730
1830
1930
2030
2131
2231
2332
2432
2532
2633
2733
2833
2933
3033
3133

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1381821203
2361821213
3351822224
4331722234
5321723244
6301624265
7291524275
8271524285
9261425296
10251425306
11241325316
12231326327
13221326327
14211226337
15191226348
16181226368
17171126378
18161126389
19151125409
201311254210
211210244310
221110244511
23910234611
2489234812
2579224912
2668225113
2758225114
2847215315
2937215217
3037205218
3127205219

Wind in May

Winds average 10 mph in May.

Across May, daily wind ranges from about 9 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
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:47 AM to 5:26 AM, and sunset from 7:03 PM to 7:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:477:03
213.35:467:04
313.35:457:04
413.45:447:05
513.45:437:06
613.45:427:07
713.45:417:07
813.55:407:08
913.55:397:09
1013.55:387:10
1113.55:377:10
1213.65:377:11
1313.65:367:12
1413.65:357:13
1513.65:347:13
1613.75:347:14
1713.75:337:15
1813.75:327:15
1913.75:327:16
2013.85:317:17
2113.85:307:18
2213.85:307:18
2313.85:297:19
2413.85:297:20
2513.95:287:20
2613.95:287:21
2713.95:277:22
2813.95:277:22
2913.95:277:23
3014.05:267:24
3114.05:267:24

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.8 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 6.82 kWh/m² in July across the year — May's 5.8 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
256.0Bright
266.0Bright
276.0Intense
286.0Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Is May a good time to visit Duncanville?

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

5.9
Sightseeing
5th-best month of the year
6.9
Beach & pool
2nd-best month of the year

May is a reasonable time to visit Duncanville for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Duncanville in May

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

In May, Duncanville sees daytime highs around 83°F and nights near 65°F. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Duncanville 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 Duncanville peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 17UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr9Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Duncanville 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 Duncanville is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (October, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar10Good
Apr11Good
May14Moderate
Jun16Moderate
Jul19Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Duncanville?

Duncanville sits at 32.7°N, 96.9°W, 725 ft above sea level, in United States. The nearest listed city is Cedar Hill, 5.0 mi away.

Topography around Duncanville

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

Within 2 miles, the terrain around Duncanville has only modest variations in elevation — a maximum elevation change of 187 ft around an average of 709 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 515 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 971 ft.

The land around Duncanville is covered by artificial surfaces (44%) and trees (42%) within 2 miles, trees (36%), artificial surfaces (33%) and grassland (21%) within 10 miles, and grassland (48%) and trees (24%) within 50 miles.

2 miles
187 ft
10 miles
515 ft
50 miles
971 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Cedar Hill 5.0 mi · DeSoto 5.0 mi · Grand Prairie 8.1 mi · Lancaster 9.9 mi · Dallas 11 mi · Irving 11 mi · Midlothian 12 mi · Arlington 13 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 Duncanville (32.6518°, -96.9083°, elevation 725 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).