Portlaoise weather in August

In August, Portlaoise sees average daytime highs of 18°C and overnight lows near 12°C, with 74 mm of rain across 12.6 wet days and about 14.5 hours of daylight. It is the 2nd-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 August, and the air most often feels dry.

Daylight stretches from about 15 h 30 min at the start of August to 13 h 30 min by month's end. Set against the rest of the year, August is Portlaoise's 11th-clearest and 11th-windiest month. For the whole year in context, see Portlaoise's year-round climate.

Daytime high: 18°; 2nd warmest
Overnight low: 12°; 11th coldest
Rainfall: 74 mm; 12.6 wet days
Daylight: 14 h 36 min; 5:17 AM – 7:50 PM
Cloud cover: 81%; 11th clearest
Wind: 13 km/h; 11th windiest
Solar energy: 3.63 kWh/m²
Travel score: 5.3; out of 10

Portlaoise is county town of County Laois, Ireland.

Density: 1,942/km²; people per km²
Founded: 1557

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

← July Portlaoise year-round climate September →Best places to visit in August

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

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 Portlaoise reaches about 18°C in the afternoon and slips back to 12°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 21°C. Set against its neighbours, August runs on par with July and about 2°C warmer than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	19	19	19	19	19	19	19	19	19	19	19	19	19	19	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Avg low (°C)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	19	12
10	19	12
11	19	12
12	19	12
13	19	12
14	19	12
15	18	12
16	18	12
17	18	12
18	18	12
19	18	12
20	18	12
21	18	12
22	18	11
23	18	11
24	18	11
25	18	11
26	18	11
27	18	11
28	18	11
29	18	11
30	18	11
31	18	11

How August really feels in Portlaoise

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

heat index over the day's high

Days feeling ≤ 0°C

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.

Portlaoise weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	8° / 3°	71	13.3	0.6	7.9	1.1
Feb	8° / 3°	59	11.7	0.9	9.5	1.2
Mar	10° / 4°	60	12.2	0.7	11.5	2.0
Apr	12° / 5°	63	12.6	0.1	13.6	2.9
May	15° / 7°	64	12.6	0	15.5	4.0
Jun	17° / 10°	70	12.1	0	16.6	5.0
Jul	19° / 12°	66	12.5	0	16.2	5.3
Aug	18° / 12°	74	12.6	0	14.5	5.3
Sep	16° / 10°	62	10.9	0	12.4	4.8
Oct	13° / 7°	78	12.7	0	10.3	3.3
Nov	10° / 5°	79	12.4	0.1	8.4	2.0
Dec	8° / 3°	79	13.6	0.6	7.4	1.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% 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 85%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	13	13	13	13	13	13	13	13	14	14	14	15	15	15	15	15	15	14	14	14	15	15	15	17	17	17	17	17	17	17	17
Cloudier (%)	87	87	87	87	87	87	87	87	86	86	86	85	85	85	85	85	85	86	86	86	85	85	85	83	83	83	83	83	83	83	83

	Clearer (%)	Cloudier (%)
1	13	87
2	13	87
3	13	87
4	13	87
5	13	87
6	13	87
7	13	87
8	13	87
9	14	86
10	14	86
11	14	86
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	15	85
18	14	86
19	14	86
20	14	86
21	15	85
22	15	85
23	15	85
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	17	83
30	17	83
31	17	83

Chance of precipitation in August

Any precipitation

Portlaoise gets around 74 mm of rain over 12.6 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 40% and peaks near 43% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	43	43	43	43	43	43	43	43	43	43	43	43	43	43	43	43	43	43	43	42	41	40	39	38	36	35	34	34	33	33	32

	Rain chance (%)
1	43
2	43
3	43
4	43
5	43
6	43
7	43
8	43
9	43
10	43
11	43
12	43
13	43
14	43
15	43
16	43
17	43
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	36
26	35
27	34
28	34
29	33
30	33
31	32

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 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	62	62	63	63	64	63	63	64	64	64	65	65	66	66	67	67	69	69	70	70	72	73	73	74	75	75	76	76	76	76	76
Comfortable (%)	33	33	32	32	31	31	31	30	30	30	29	29	28	28	27	27	26	26	25	25	24	23	23	23	22	22	21	21	21	21	21
Humid (%)	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	5	5	5	5	4	4	4	3	3	3	3	3	3	3	3

	Dry (%)	Comfortable (%)	Humid (%)
1	62	33	5
2	62	33	5
3	63	32	5
4	63	32	5
5	64	31	5
6	63	31	6
7	63	31	6
8	64	30	6
9	64	30	6
10	64	30	6
11	65	29	6
12	65	29	6
13	66	28	6
14	66	28	6
15	67	27	6
16	67	27	6
17	69	26	5
18	69	26	5
19	70	25	5
20	70	25	5
21	72	24	4
22	73	23	4
23	73	23	4
24	74	23	3
25	75	22	3
26	75	22	3
27	76	21	3
28	76	21	3
29	76	21	3
30	76	21	3
31	76	21	3

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 13 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	13	light breeze
2	13	light breeze
3	13	light breeze
4	13	light breeze
5	13	light breeze
6	13	light breeze
7	13	light breeze
8	13	light breeze
9	13	light breeze
10	13	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light breeze
31	13	light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 30 min at the start of August to 13 h 30 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 5:43 AM, and sunset from 8:19 PM to 7:15 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	15.5	15.4	15.3	15.3	15.2	15.2	15.1	15.1	15.0	14.9	14.9	14.8	14.7	14.7	14.6	14.6	14.5	14.4	14.4	14.3	14.2	14.2	14.1	14.0	14.0	13.9	13.8	13.7	13.7	13.6	13.5
Sunrise (AM)	4:51	4:53	4:55	4:56	4:58	5:00	5:01	5:03	5:05	5:06	5:08	5:10	5:12	5:13	5:15	5:17	5:18	5:20	5:22	5:24	5:25	5:27	5:29	5:31	5:32	5:34	5:36	5:38	5:40	5:41	5:43
Sunset (PM)	8:19	8:17	8:16	8:14	8:12	8:10	8:08	8:06	8:04	8:02	8:00	7:58	7:56	7:54	7:52	7:50	7:48	7:45	7:43	7:41	7:39	7:37	7:34	7:32	7:30	7:27	7:25	7:23	7:20	7:18	7:15

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	15.5	4:51	8:19
2	15.4	4:53	8:17
3	15.3	4:55	8:16
4	15.3	4:56	8:14
5	15.2	4:58	8:12
6	15.2	5:00	8:10
7	15.1	5:01	8:08
8	15.1	5:03	8:06
9	15.0	5:05	8:04
10	14.9	5:06	8:02
11	14.9	5:08	8:00
12	14.8	5:10	7:58
13	14.7	5:12	7:56
14	14.7	5:13	7:54
15	14.6	5:15	7:52
16	14.6	5:17	7:50
17	14.5	5:18	7:48
18	14.4	5:20	7:45
19	14.4	5:22	7:43
20	14.3	5:24	7:41
21	14.2	5:25	7:39
22	14.2	5:27	7:37
23	14.1	5:29	7:34
24	14.0	5:31	7:32
25	14.0	5:32	7:30
26	13.9	5:34	7:27
27	13.8	5:36	7:25
28	13.7	5:38	7:23
29	13.7	5:40	7:20
30	13.6	5:41	7:18
31	13.5	5:43	7:15

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.63 kWh/m².

For context, solar energy here swings from a low near 0.53 kWh/m² to a high of 4.81 kWh/m² in June across the year — August's 3.63 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.9	3.9	3.9	3.9	3.8	3.8	3.8	3.8	3.8	3.7	3.7	3.7	3.7	3.7	3.6	3.6	3.6	3.6	3.6	3.5	3.5	3.5	3.5	3.5	3.4	3.4	3.4	3.3	3.3	3.3	3.2
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	3.9	Moderate
4	3.9	Moderate
5	3.8	Moderate
6	3.8	Moderate
7	3.8	Moderate
8	3.8	Moderate
9	3.8	Moderate
10	3.7	Moderate
11	3.7	Moderate
12	3.7	Moderate
13	3.7	Moderate
14	3.7	Moderate
15	3.6	Moderate
16	3.6	Moderate
17	3.6	Moderate
18	3.6	Moderate
19	3.6	Moderate
20	3.5	Moderate
21	3.5	Moderate
22	3.5	Moderate
23	3.5	Moderate
24	3.5	Moderate
25	3.4	Moderate
26	3.4	Moderate
27	3.4	Moderate
28	3.3	Moderate
29	3.3	Moderate
30	3.3	Moderate
31	3.2	Moderate

Planning a trip in August

Is August a good time to visit Portlaoise?

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

5.3

Sightseeing

1st-best month of the year

1.9

Beach & pool

2nd-best month of the year

August is a reasonable time to visit Portlaoise for sightseeing.

What to pack for Portlaoise in August

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

In August, Portlaoise sees daytime highs around 18°C and nights near 12°C. Worth packing: rain gear. About 13 days see rain.

rain gear

UV index in Portlaoise in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Portlaoise peaks around August 13 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 1 (low).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	5	5	5	6	4	2	1	1
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	5	High
Jun	5	High
Jul	5	High
Aug	6	High
Sep	4	Moderate
Oct	2	Low
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Portlaoise?

Portlaoise sits at 53.0°N, 7.3°W, 101 m above sea level, in Ireland. The nearest listed city is Tullamore, 29 km away.

Topography around Portlaoise

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

Within 3 km, the terrain around Portlaoise has only modest variations in elevation — a maximum elevation change of 55 m around an average of 101 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 453 m; within 80 km, large variations in elevation — a maximum elevation change of 931 m.

The land around Portlaoise is covered by grassland (62%) within 3 km, grassland (68%) within 16 km, and grassland (76%) within 80 km.

3 km

55 m

grassland 62%

16 km

453 m

grassland 68%

80 km

931 m

grassland 76%

treesgrasslandcroplandartificial surfaceswater

← July Portlaoise year-round climate September →Best places to visit in August

August weather nearby: Tullamore 29 km · Carlow 33 km · Droichead Nua 37 km · Kilkenny 42 km · Naas 47 km · An Muileann gCearr 55 km · Athlone 61 km · Celbridge 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

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 Portlaoise (53.0344°, -7.2998°, elevation 101 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. 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).

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	19	12
10	19	12
11	19	12
12	19	12
13	19	12
14	19	12
15	18	12
16	18	12
17	18	12
18	18	12
19	18	12
20	18	12
21	18	12
22	18	11
23	18	11
24	18	11
25	18	11
26	18	11
27	18	11
28	18	11
29	18	11
30	18	11
31	18	11

	Clearer (%)	Cloudier (%)
1	13	87
2	13	87
3	13	87
4	13	87
5	13	87
6	13	87
7	13	87
8	13	87
9	14	86
10	14	86
11	14	86
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	15	85
18	14	86
19	14	86
20	14	86
21	15	85
22	15	85
23	15	85
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	17	83
30	17	83
31	17	83

	Rain chance (%)
1	43
2	43
3	43
4	43
5	43
6	43
7	43
8	43
9	43
10	43
11	43
12	43
13	43
14	43
15	43
16	43
17	43
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	36
26	35
27	34
28	34
29	33
30	33
31	32

	Dry (%)	Comfortable (%)	Humid (%)
1	62	33	5
2	62	33	5
3	63	32	5
4	63	32	5
5	64	31	5
6	63	31	6
7	63	31	6
8	64	30	6
9	64	30	6
10	64	30	6
11	65	29	6
12	65	29	6
13	66	28	6
14	66	28	6
15	67	27	6
16	67	27	6
17	69	26	5
18	69	26	5
19	70	25	5
20	70	25	5
21	72	24	4
22	73	23	4
23	73	23	4
24	74	23	3
25	75	22	3
26	75	22	3
27	76	21	3
28	76	21	3
29	76	21	3
30	76	21	3
31	76	21	3

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	19	12
10	19	12
11	19	12
12	19	12
13	19	12
14	19	12
15	18	12
16	18	12
17	18	12
18	18	12
19	18	12
20	18	12
21	18	12
22	18	11
23	18	11
24	18	11
25	18	11
26	18	11
27	18	11
28	18	11
29	18	11
30	18	11
31	18	11

	Clearer (%)	Cloudier (%)
1	13	87
2	13	87
3	13	87
4	13	87
5	13	87
6	13	87
7	13	87
8	13	87
9	14	86
10	14	86
11	14	86
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	15	85
18	14	86
19	14	86
20	14	86
21	15	85
22	15	85
23	15	85
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	17	83
30	17	83
31	17	83

	Rain chance (%)
1	43
2	43
3	43
4	43
5	43
6	43
7	43
8	43
9	43
10	43
11	43
12	43
13	43
14	43
15	43
16	43
17	43
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	36
26	35
27	34
28	34
29	33
30	33
31	32

	Dry (%)	Comfortable (%)	Humid (%)
1	62	33	5
2	62	33	5
3	63	32	5
4	63	32	5
5	64	31	5
6	63	31	6
7	63	31	6
8	64	30	6
9	64	30	6
10	64	30	6
11	65	29	6
12	65	29	6
13	66	28	6
14	66	28	6
15	67	27	6
16	67	27	6
17	69	26	5
18	69	26	5
19	70	25	5
20	70	25	5
21	72	24	4
22	73	23	4
23	73	23	4
24	74	23	3
25	75	22	3
26	75	22	3
27	76	21	3
28	76	21	3
29	76	21	3
30	76	21	3
31	76	21	3

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	19	12
10	19	12
11	19	12
12	19	12
13	19	12
14	19	12
15	18	12
16	18	12
17	18	12
18	18	12
19	18	12
20	18	12
21	18	12
22	18	11
23	18	11
24	18	11
25	18	11
26	18	11
27	18	11
28	18	11
29	18	11
30	18	11
31	18	11

	Clearer (%)	Cloudier (%)
1	13	87
2	13	87
3	13	87
4	13	87
5	13	87
6	13	87
7	13	87
8	13	87
9	14	86
10	14	86
11	14	86
12	15	85
13	15	85
14	15	85
15	15	85
16	15	85
17	15	85
18	14	86
19	14	86
20	14	86
21	15	85
22	15	85
23	15	85
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	17	83
30	17	83
31	17	83

	Rain chance (%)
1	43
2	43
3	43
4	43
5	43
6	43
7	43
8	43
9	43
10	43
11	43
12	43
13	43
14	43
15	43
16	43
17	43
18	43
19	43
20	42
21	41
22	40
23	39
24	38
25	36
26	35
27	34
28	34
29	33
30	33
31	32

	Dry (%)	Comfortable (%)	Humid (%)
1	62	33	5
2	62	33	5
3	63	32	5
4	63	32	5
5	64	31	5
6	63	31	6
7	63	31	6
8	64	30	6
9	64	30	6
10	64	30	6
11	65	29	6
12	65	29	6
13	66	28	6
14	66	28	6
15	67	27	6
16	67	27	6
17	69	26	5
18	69	26	5
19	70	25	5
20	70	25	5
21	72	24	4
22	73	23	4
23	73	23	4
24	74	23	3
25	75	22	3
26	75	22	3
27	76	21	3
28	76	21	3
29	76	21	3
30	76	21	3
31	76	21	3