Dundalk weather in May

In May, Dundalk sees average daytime highs of 70°F and overnight lows near 57°F, with 3.8 in of rain across 11 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 66°F in the first days to 74°F by the end. The sky is clear or mostly clear about 27% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Dundalk's 11th-clearest and 8th-windiest month. For the whole year in context, see Dundalk's year-round climate.

Daytime high
70°
5th warmest
Overnight low
57°
8th coldest
Rainfall
3.8 in
11 wet days
Daylight
14 h 06 min
4:58 AM – 7:07 PM
Cloud cover
61%
11th clearest
Wind
8 mph
8th windiest
Solar energy
5.67 kWh/m²
Travel score
6.3
out of 10

Dundalk is census-designated place in Maryland, United States.

Density
1,412/km²
people per km²
Founded
1856

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 66°F in the first days to 74°F by the end.

A typical May day in Dundalk reaches about 70°F in the afternoon and slips back to 57°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 78°F. Set against its neighbours, May runs about 9°F warmer than April and about 9°F cooler than June.

40°50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
16552
26553
36653
46653
56654
66754
76754
86755
96755
106855
116855
126856
136956
146956
156956
166957
177057
187058
197058
207158
217159
227159
237259
247260
257360
267360
277361
287461
297462
307462
317562

How May really feels in Dundalk

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.

Dundalk weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 30°3.692.79.60.0
Feb42° / 31°3.39.13.110.50.4
Mar50° / 37°4.510.52.111.72.2
Apr61° / 47°3.810.40.2134.9
May70° / 57°3.811014.16.3
Jun79° / 67°3.510.9014.76.5
Jul84° / 72°3.811.4014.55.5
Aug82° / 71°3.610.4013.56.1
Sep76° / 64°4.79.4012.37.0
Oct65° / 53°4.08.40116.2
Nov54° / 42°3.48.30.29.83.5
Dec45° / 35°4.39.61.69.31.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64753
74654
84753
94753
104654
114654
124654
134654
144654
154753
164654
174654
184654
194753
204753
214753
224753
234753
244753
254753
264753
274852
284951
294852
304852
314753

Chance of precipitation in May

Any precipitation

Dundalk gets around 3.8 in of rain over 11 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 36% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
435
535
635
735
835
935
1036
1136
1236
1336
1436
1536
1636
1736
1836
1936
2036
2136
2236
2336
2436
2536
2636
2736
2836
2935
3035
3135

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
17717600
27618600
37319710
47220710
57021810
66921910
76921910
867221010
965221120
1064221220
1163221230
1262221330
1361211440
1461211440
1559211550
1657211660
1755211770
1856201770
1954201880
2052201990
21492119111
22472120121
23452120131
24432121141
25422121151
26402221161
27382222162
28372322172
29352322182
30342322192
31322322202

Wind in May

Winds average 8 mph in May.

Across May, daily wind ranges from about 7 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
247light breeze
257light breeze
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:14 AM to 4:48 AM, and sunset from 6:52 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:146:52
213.75:136:53
313.75:126:54
413.75:116:55
513.85:106:56
613.85:086:57
713.85:076:58
813.95:066:59
913.95:057:00
1013.95:047:01
1114.05:037:02
1214.05:027:03
1314.05:017:04
1414.15:007:05
1514.14:597:06
1614.14:587:07
1714.24:577:08
1814.24:567:08
1914.24:557:09
2014.34:557:10
2114.34:547:11
2214.34:537:12
2314.34:527:13
2414.44:527:14
2514.44:517:15
2614.44:507:15
2714.44:507:16
2814.54:497:17
2914.54:497:18
3014.54:487:19
3114.54:487:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.67 kWh/m².

For context, solar energy here swings from a low near 1.9 kWh/m² to a high of 6.07 kWh/m² in June across the year — May's 5.67 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Dundalk

In seasonPeak

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

Dundalk sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Dundalk?

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

6.3
Sightseeing
3rd-best month of the year
3.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Dundalk for sightseeing.

What to pack for Dundalk in May

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

In May, Dundalk sees daytime highs around 70°F and nights near 57°F. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Dundalk in May

The nearest coast averages about 58°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 12 mi away) is warmest in August at about 78°F and coldest in February near 36°F.

It's comfortable for a long swim from Jun 16 to Oct 5 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar40Bracing
Apr47Bracing
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov53Bracing
Dec44Bracing

UV index in Dundalk 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 Dundalk peaks around July 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 10UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Dundalk 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 Dundalk is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Dundalk?

Dundalk sits at 39.3°N, 76.5°W, 16 ft above sea level, in United States. The nearest listed city is Essex, 5.0 mi away.

Topography around Dundalk

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

Within 2 miles, the terrain around Dundalk has only modest variations in elevation — a maximum elevation change of 148 ft around an average of 16 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 505 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,417 ft.

The land around Dundalk is covered by artificial surfaces (40%) and water (37%) within 2 miles, trees (33%), artificial surfaces (29%) and water (29%) within 10 miles, and trees (51%) within 50 miles.

2 miles
148 ft
10 miles
505 ft
50 miles
1,417 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Essex 5.0 mi · Rosedale 5.0 mi · Frankford 5.6 mi · Baltimore 5.6 mi · Rossville 6.2 mi · Middle River 7.5 mi · Green Haven 8.1 mi · Ferndale 8.1 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 Dundalk (39.2507°, -76.5205°, elevation 16 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).