Dundalk weather in July

In July, Dundalk sees average daytime highs of 18°C and overnight lows near 12°C, with 76 mm of rain across 14.5 wet days and about 16.3 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 4% of the time in July, and the air most often feels dry.

Daylight stretches from about 16 h 48 min at the start of July to 15 h 42 min by month's end. Set against the rest of the year, July is Dundalk's 12th-clearest and 12th-windiest month. For the whole year in context, see Dundalk's year-round climate.

Daytime high
18°
1st warmest
Overnight low
12°
12th coldest
Rainfall
76 mm
14.5 wet days
Daylight
16 h 24 min
4:20 AM – 8:43 PM
Cloud cover
82%
12th clearest
Wind
13 km/h
12th windiest
Solar energy
4.31 kWh/m²
Travel score
5.1
out of 10

Dundalk is county town and administrative capital of County Louth, Ireland.

Air quality
Excellent
PM10 14.4 µg/m³ · 2019
Density
1,747/km²
people per km²
Founded
~3499 BCE

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 18°C through the month.

A typical July day in Dundalk reaches about 18°C in the afternoon and slips back to 12°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11811
21811
31812
41812
51812
61812
71812
81812
91812
101812
111812
121812
131812
141812
151812
161812
171912
181912
191912
201912
211912
221912
231912
241912
251912
261912
271913
281913
291913
301913
311913

How July really feels in Dundalk

Once humidity and wind are folded in, July averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

July 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 July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7113.31.17.70.9
Feb / 5811.919.41.1
Mar / 6012.60.711.51.8
Apr12° / 6512.60.113.72.7
May14° / 6913.8015.73.7
Jun17° / 10°7513016.84.7
Jul18° / 12°7614.5016.35.1
Aug18° / 12°8313.7014.65.1
Sep16° / 10°6712.1012.54.5
Oct13° / 7812.4010.23.2
Nov10° / 8113.30.18.31.9
Dec / 7512.30.77.21.1

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of July, with mostly cloudy or overcast conditions the remaining 85%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11684
21684
31585
41585
51585
61585
71585
81585
91585
101585
111486
121486
131486
141486
151585
161585
171684
181684
191684
201684
211684
221585
231585
241585
251585
261585
271585
281486
291486
301486
311486

Chance of precipitation in July

Any precipitation

Dundalk gets around 76 mm of rain over 14.5 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 48% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
146
246
346
447
547
647
747
847
947
1046
1146
1246
1346
1445
1545
1645
1744
1844
1944
2044
2144
2245
2345
2446
2546
2647
2747
2848
2948
3048
3148

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
178202
277212
376222
476222
575232
674233
773243
873243
972253
1072253
1171263
1270264
1370264
1469274
1568275
1667285
1766295
1865305
1964315
2063325
2162335
2261345
2361345
2460355
2559365
2659365
2758375
2858375
2958375
3058375
3158375

Wind in July

Winds average 13 km/h in July, the calmest month.

Across July, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 16 h 48 min at the start of July to 15 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over July. Sunrise moves from 4:04 AM to 4:42 AM, and sunset from 8:54 PM to 8:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.84:048:54
216.84:058:53
316.84:068:53
416.84:078:52
516.74:088:52
616.74:088:51
716.74:098:51
816.74:108:50
916.64:118:49
1016.64:128:49
1116.64:148:48
1216.54:158:47
1316.54:168:46
1416.54:178:45
1516.44:188:44
1616.44:208:43
1716.34:218:42
1816.34:228:41
1916.34:248:39
2016.24:258:38
2116.24:278:37
2216.14:288:35
2316.14:298:34
2416.04:318:33
2516.04:338:31
2615.94:348:30
2715.94:368:28
2815.84:378:26
2915.84:398:25
3015.74:418:23
3115.74:428:21

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.31 kWh/m².

For context, solar energy here swings from a low near 0.49 kWh/m² to a high of 4.81 kWh/m² in May across the year — July's 4.31 kWh/m² sits near the top of that range.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
314.0Moderate
Planning a trip in July

Is July a good time to visit Dundalk?

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

5.1
Sightseeing
1st-best month of the year
1.9
Beach & pool
1st-best month of the year

July is a reasonable time to visit Dundalk for sightseeing.

What to pack for Dundalk in July

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

In July, Dundalk sees daytime highs around 18°C and nights near 12°C. Pack rain gear. About 15 days see rain.

rain gear

Sea temperature near Dundalk in July

The nearest coast averages about 15°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 km away) is warmest in August at about 15°C and coldest in March near 8°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun13Bracing
Jul15Bracing
Aug15Cool
Sep14Bracing
Oct13Bracing
Nov12Bracing
Dec10Bracing

UV index in Dundalk in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Dundalk peaks around August 10 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 10UV 5Dec 20UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Dundalk?

Dundalk sits at 54.0°N, 6.4°W, 18 m above sea level, in Ireland. The nearest listed city is Newry, 21 km away.

DroghedaBanbridgeNavanBalbrigganPortadownCraigavonSwords

Topography around Dundalk

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dundalk.

Within 3 km, the terrain around Dundalk has only modest variations in elevation — a maximum elevation change of 58 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 582 m; within 80 km, large variations in elevation — a maximum elevation change of 852 m.

The land around Dundalk is covered by grassland (51%) and artificial surfaces (21%) within 3 km, grassland (57%) within 16 km, and grassland (62%) and water (24%) within 80 km.

3 km
58 m
16 km
582 m
80 km
852 m
treesgrasslandcroplandartificial surfaceswaterwetland
July weather nearby: Newry 21 km · Drogheda 32 km · Banbridge 40 km · Navan 42 km · Balbriggan 46 km · Portadown 47 km · Craigavon 50 km · Swords 61 km

Ireland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 85% of US
price level, 2025
GDP per capita
$131,592
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
Religion
Roman Catholic 69%none 15%Protestant 4%Orthodox 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 (54°, -6.4167°, elevation 18 m), 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).