Dallas weather in May

In May, Dallas sees average daytime highs of 66°F and overnight lows near 46°F, with 2.6 in of rain across 10.1 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 63°F in the first days to 69°F by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 06 min by month's end. Set against the rest of the year, May is Dallas's 6th-clearest and 9th-windiest month. For the whole year in context, see Dallas's year-round climate.

Daytime high
66°
5th warmest
Overnight low
46°
8th coldest
Rainfall
2.6 in
10.1 wet days
Daylight
14 h 36 min
4:50 AM – 7:29 PM
Cloud cover
64%
6th clearest
Wind
5 mph
9th windiest
Solar energy
5.62 kWh/m²
Travel score
6.0
out of 10

Dallas is county seat of Polk County, Oregon, United States.

Density
1,226/km²
people per km²
Founded
1845

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 63°F in the first days to 69°F by the end.

A typical May day in Dallas reaches about 66°F in the afternoon and slips back to 46°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 56°F and 79°F. Set against its neighbours, May runs about 7°F warmer than April and about 6°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16343
26344
36344
46444
56444
66444
76444
86545
96545
106545
116545
126546
136546
146646
156646
166646
176646
186647
196747
206747
216747
226747
236748
246848
256848
266848
276848
286848
296949
306949
316949

How May really feels in Dallas

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.

Dallas weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan47° / 36°6.916.81.891.1
Feb50° / 37°5.314.41.710.11.9
Mar54° / 39°5.916.81.111.62.8
Apr59° / 41°4.315.20.113.23.9
May66° / 46°2.610.1014.66.0
Jun72° / 51°1.56.4015.37.3
Jul80° / 55°0.31.7015.18.1
Aug81° / 55°0.52.4013.98.0
Sep75° / 51°1.55012.37.9
Oct63° / 45°3.910.7010.75.4
Nov51° / 39°6.916.40.39.42.2
Dec46° / 35°8.117.41.78.70.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23763
33862
43961
53961
63961
73961
83961
93961
103862
113763
123763
133664
143664
153664
163565
173565
183565
193466
203466
213565
223565
233565
243763
253763
263862
273862
283862
293961
303961
314060

Chance of precipitation in May

Any precipitation

Dallas gets around 2.6 in of rain over 10.1 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 33% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
238
337
436
535
635
734
834
934
1034
1134
1233
1333
1433
1533
1633
1733
1833
1933
2033
2132
2232
2331
2430
2530
2629
2728
2828
2928
3028
3127

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19820
29820
39820
49820
59820
69820
79820
89820
99820
109820
119820
129820
139820
149820
159730
169730
179730
189730
199730
209730
219730
229730
239631
249631
259631
269631
279541
289541
299541
309541
319541

Wind in May

Winds average 5 mph in May.

Across May, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:11 AM to 4:37 AM, and sunset from 7:10 PM to 7:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:117:10
214.05:097:12
314.15:087:13
414.15:067:14
514.25:057:15
614.25:037:17
714.35:027:18
814.35:017:19
914.44:597:20
1014.44:587:21
1114.44:577:23
1214.54:557:24
1314.54:547:25
1414.64:537:26
1514.64:527:27
1614.64:507:29
1714.74:497:30
1814.74:487:31
1914.74:477:32
2014.84:467:33
2114.84:457:34
2214.94:447:35
2314.94:437:36
2414.94:427:37
2514.94:427:38
2615.04:417:39
2715.04:407:40
2815.04:397:41
2915.14:387:42
3015.14:387:43
3115.14:377:44

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.62 kWh/m².

For context, solar energy here swings from a low near 1.07 kWh/m² to a high of 7.04 kWh/m² in July across the year — May's 5.62 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Dallas

In seasonPeak

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

Dallas's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Dallas?

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

6.0
Sightseeing
5th-best month of the year
2.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Dallas for sightseeing.

What to pack for Dallas in May

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

In May, Dallas sees daytime highs around 66°F and nights near 46°F. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

Sea temperature near Dallas in May

The nearest coast averages about 54°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 40 mi away) is warmest in July at about 57°F and coldest in February near 50°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

50°55°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan50Bracing
Feb50Bracing
Mar50Bracing
Apr51Bracing
May54Bracing
Jun57Bracing
Jul57Bracing
Aug57Bracing
Sep57Bracing
Oct55Bracing
Nov53Bracing
Dec51Bracing

UV index in Dallas in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Dallas peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highHighModerateLowJul 17UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May8Very high
Jun7High
Jul8Very high
Aug7Very high
Sep5Moderate
Oct4Moderate
Nov1Low
Dec1Low

Air quality in Dallas 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 Dallas is worst in September — around 34 µg/m³ PM2.5 (moderate), about 5.1× the cleanest month (January, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1531 µg/m³Jan 167 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar11Good
Apr11Good
May9Good
Jun8Good
Jul7Good
Aug14Moderate
Sep34Moderate
Oct11Good
Nov10Good
Dec8Good
Location & terrain

Where is Dallas?

Dallas sits at 44.9°N, 123.3°W, 325 ft above sea level, in United States. The nearest listed city is Salem, 14 mi away.

Topography around Dallas

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

Within 2 miles, the terrain around Dallas has only modest variations in elevation — a maximum elevation change of 614 ft around an average of 397 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,657 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,738 ft.

The land around Dallas is covered by trees (49%) and grassland (28%) within 2 miles, trees (52%), cropland (26%) and grassland (20%) within 10 miles, and trees (63%) within 50 miles.

2 miles
614 ft
10 miles
2,657 ft
50 miles
4,738 ft
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Salem 14 mi · Keizer 15 mi · Four Corners 16 mi · Hayesville 17 mi · McMinnville 21 mi · Albany 22 mi · Corvallis 25 mi · Woodburn 27 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 Dallas (44.9193°, -123.317°, elevation 325 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. 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).