Sligo weather in August

In August, Sligo sees average daytime highs of 18°C and overnight lows near 12°C, with 108 mm of rain across 18 wet days and about 14.7 hours of daylight. It is the 2nd-warmest and 6th-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 3% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 36 min at the start of August to 13 h 36 min by month's end. Set against the rest of the year, August is Sligo's 11th-clearest and 11th-windiest month. For the whole year in context, see Sligo's year-round climate.

Daytime high
18°
2nd warmest
Overnight low
12°
11th coldest
Rainfall
108 mm
18 wet days
Daylight
14 h 42 min
5:18 AM – 7:58 PM
Cloud cover
82%
11th clearest
Wind
13 km/h
11th windiest
Solar energy
3.69 kWh/m²
Travel score
4.4
out of 10

Sligo is main town in county Sligo, Ireland.

Density
668/km²
people per km²

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Sligo 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 15°C and 21°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11812
21812
31812
41812
51812
61812
71812
81812
91812
101812
111812
121812
131812
141812
151812
161812
171812
181812
191812
201712
211711
221711
231711
241711
251711
261711
271711
281711
291711
301711
311711

How August really feels in Sligo

Once humidity and wind are folded in, August 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

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

Sligo weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 10917.61.47.70.9
Feb / 9415.41.39.31.0
Mar / 9116.40.911.51.7
Apr12° / 8414.90.213.72.6
May14° / 9615.1015.73.6
Jun16° / 10°9915.5016.84.2
Jul18° / 12°11017.9016.44.5
Aug18° / 12°10818014.74.4
Sep16° / 10°9115012.54.1
Oct13° / 11016.7010.22.9
Nov10° / 11017.50.18.21.6
Dec / 11418.20.97.21.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 11% of August, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11090
21189
31189
41189
51288
61288
71288
81387
91387
101486
111486
121486
131585
141585
151585
161585
171486
181486
191585
201585
211585
221585
231585
241585
251585
261585
271486
281585
291585
301585
311585

Chance of precipitation in August

Any precipitation

Sligo gets around 108 mm of rain over 18 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 58% and peaks near 61% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
160
260
360
460
559
659
759
859
959
1060
1160
1260
1360
1461
1561
1661
1761
1861
1961
2061
2160
2259
2358
2457
2556
2655
2754
2853
2952
3051
3151

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 70% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
165305
265305
365305
466295
566295
666295
766295
866295
967294
1067294
1166304
1266304
1366304
1467303
1568293
1668293
1769283
1869283
1970273
2071263
2172253
2274242
2375232
2475232
2576222
2677212
2777212
2878202
2978202
3079192
3179192

Wind in August

Winds average 13 km/h in August.

Across August, daily wind ranges from about 13 km/h on the calmest days to 14 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
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 36 min at the start of August to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over August. Sunrise moves from 4:51 AM to 5:46 AM, and sunset from 8:29 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.64:518:29
215.64:538:27
315.54:548:25
415.54:568:23
515.44:588:21
615.35:008:19
715.35:018:17
815.25:038:15
915.15:058:13
1015.15:078:11
1115.05:098:09
1214.95:108:07
1314.95:128:05
1414.85:148:03
1514.75:168:00
1614.75:187:58
1714.65:207:56
1814.55:217:54
1914.55:237:51
2014.45:257:49
2114.35:277:47
2214.35:297:44
2314.25:317:42
2414.15:337:40
2514.05:347:37
2614.05:367:35
2713.95:387:32
2813.85:407:30
2913.85:427:27
3013.75:447:25
3113.65:467:22

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.69 kWh/m².

For context, solar energy here swings from a low near 0.45 kWh/m² to a high of 4.93 kWh/m² in June across the year — August's 3.69 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Moderate
34.0Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.2Moderate
Planning a trip in August

Is August a good time to visit Sligo?

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

4.4
Sightseeing
2nd-best month of the year
Beach & pool
never really warm enough

August is a reasonable time to visit Sligo for sightseeing.

What to pack for Sligo in August

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

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

rain gear

Sea temperature near Sligo in August

The nearest coast averages about 16°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in August at about 16°C and coldest in February near 8°C.

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

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun13Bracing
Jul15Bracing
Aug16Cool
Sep15Bracing
Oct13Bracing
Nov12Bracing
Dec10Bracing

UV index in Sligo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Sligo peaks around June 23 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5Moderate
Jun5High
Jul5High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Sligo?

Sligo sits at 54.3°N, 8.5°W, 13 m above sea level, in Ireland. The nearest listed city is Omagh, 84 km away.

OmaghLetterkennyAthloneLondonderry County BoroughDerryAn Muileann gCearrGalwayTullamore

Topography around Sligo

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

Within 3 km, the terrain around Sligo has only modest variations in elevation — a maximum elevation change of 120 m around an average of 27 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 660 m; within 80 km, large variations in elevation — a maximum elevation change of 805 m.

The land around Sligo is covered by grassland (56%) and trees (21%) within 3 km, grassland (66%) within 16 km, and grassland (64%) and water (24%) within 80 km.

3 km
120 m
16 km
660 m
80 km
805 m
treesgrasslandartificial surfaceswater
August weather nearby: Omagh 84 km · Letterkenny 89 km · Athlone 100 km · Londonderry County Borough 110 km · Derry 110 km · An Muileann gCearr 111 km · Galway 117 km · Tullamore 128 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 Sligo (54.2697°, -8.4694°, elevation 13 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).