Greystones weather in May

In May, Greystones sees average daytime highs of 12°C and overnight lows near 9°C, with 58 mm of rain across 12.3 wet days and about 15.5 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 13°C by the end. The sky is clear or mostly clear about 16% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 42 min at the start of May to 16 h 18 min by month's end. Set against the rest of the year, May is Greystones's 1st-clearest and 9th-windiest month. For the whole year in context, see Greystones's year-round climate.

Daytime high: 12°; 6th warmest
Overnight low: 9°; 7th coldest
Rainfall: 58 mm; 12.3 wet days
Daylight: 15 h 36 min; 4:33 AM – 8:08 PM
Cloud cover: 69%; 1st clearest
Wind: 19 km/h; 9th windiest
Solar energy: 5.31 kWh/m²
Travel score: 3.0; out of 10

Greystones is town in County Wicklow, Ireland.

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

← April Greystones year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 11°C in the first days to 13°C by the end.

A typical May day in Greystones reaches about 12°C in the afternoon and slips back to 9°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 14°C. Set against its neighbours, May runs about 2°C warmer than April and about 2°C cooler than June.

	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)	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13
Avg low (°C)	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	10

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

Greystones weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 12th-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° / 5°	81	14.7	0.5	7.9	1.2
Feb	8° / 5°	64	12.7	0.9	9.5	1.1
Mar	9° / 6°	62	12.2	0.5	11.5	1.5
Apr	10° / 7°	61	12.7	0.1	13.6	2.1
May	12° / 9°	58	12.3	0	15.5	3.0
Jun	14° / 11°	68	11.6	0	16.6	4.0
Jul	16° / 13°	71	13.6	0	16.2	4.5
Aug	17° / 13°	75	13	0	14.5	4.7
Sep	15° / 12°	75	12.5	0	12.4	4.2
Oct	13° / 10°	92	13.7	0	10.3	3.2
Nov	11° / 8°	107	15.3	0.1	8.4	2.1
Dec	9° / 6°	90	13.9	0.4	7.4	1.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 67%.

	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 (%)	34	35	35	35	35	35	35	35	34	34	33	33	33	31	31	31	30	30	30	30	31	32	32	32	32	33	34	34	35	35	35
Cloudier (%)	66	65	65	65	65	65	65	65	66	66	67	67	67	69	69	69	70	70	70	70	69	68	68	68	68	67	66	66	65	65	65

	Clearer (%)	Cloudier (%)
1	34	66
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	33	67
12	33	67
13	33	67
14	31	69
15	31	69
16	31	69
17	30	70
18	30	70
19	30	70
20	30	70
21	31	69
22	32	68
23	32	68
24	32	68
25	32	68
26	33	67
27	34	66
28	34	66
29	35	65
30	35	65
31	35	65

Chance of precipitation in May

Any precipitation

Greystones gets around 58 mm of rain over 12.3 wet days in May, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 42% on the wettest days.

	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 (%)	42	41	41	40	40	40	39	39	40	40	40	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	40	40	40	40	40

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

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 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	99	1
30	99	1
31	99	1

Wind in May

Winds average 19 km/h in May.

Across May, daily wind ranges from about 18 km/h on the calmest days to 20 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)	20	20	20	20	20	20	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
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	20	light breeze
2	20	light breeze
3	20	light breeze
4	20	light breeze
5	20	light breeze
6	20	light breeze
7	19	light breeze
8	19	light breeze
9	19	light breeze
10	19	light breeze
11	19	light breeze
12	19	light breeze
13	19	light breeze
14	19	light breeze
15	19	light breeze
16	19	light breeze
17	19	light breeze
18	19	light breeze
19	19	light breeze
20	19	light breeze
21	18	light breeze
22	18	light breeze
23	18	light breeze
24	18	light breeze
25	18	light breeze
26	18	light breeze
27	18	light breeze
28	18	light breeze
29	18	light breeze
30	18	light breeze
31	18	light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 42 min at the start of May to 16 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 96 minutes over May. Sunrise moves from 5:01 AM to 4:13 AM, and sunset from 7:42 PM to 8:30 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)	14.7	14.8	14.8	14.9	14.9	15.0	15.1	15.1	15.2	15.2	15.3	15.4	15.4	15.5	15.5	15.6	15.6	15.7	15.7	15.8	15.8	15.9	15.9	16.0	16.0	16.1	16.1	16.2	16.2	16.2	16.3
Sunrise (AM)	5:01	4:59	4:57	4:55	4:53	4:51	4:49	4:47	4:45	4:43	4:41	4:40	4:38	4:36	4:35	4:33	4:31	4:30	4:28	4:27	4:25	4:24	4:23	4:21	4:20	4:19	4:18	4:17	4:15	4:14	4:13
Sunset (PM)	7:42	7:44	7:46	7:48	7:49	7:51	7:53	7:55	7:56	7:58	8:00	8:01	8:03	8:05	8:06	8:08	8:10	8:11	8:13	8:14	8:16	8:17	8:19	8:20	8:22	8:23	8:25	8:26	8:27	8:29	8:30

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.7	5:01	7:42
2	14.8	4:59	7:44
3	14.8	4:57	7:46
4	14.9	4:55	7:48
5	14.9	4:53	7:49
6	15.0	4:51	7:51
7	15.1	4:49	7:53
8	15.1	4:47	7:55
9	15.2	4:45	7:56
10	15.2	4:43	7:58
11	15.3	4:41	8:00
12	15.4	4:40	8:01
13	15.4	4:38	8:03
14	15.5	4:36	8:05
15	15.5	4:35	8:06
16	15.6	4:33	8:08
17	15.6	4:31	8:10
18	15.7	4:30	8:11
19	15.7	4:28	8:13
20	15.8	4:27	8:14
21	15.8	4:25	8:16
22	15.9	4:24	8:17
23	15.9	4:23	8:19
24	16.0	4:21	8:20
25	16.0	4:20	8:22
26	16.1	4:19	8:23
27	16.1	4:18	8:25
28	16.2	4:17	8:26
29	16.2	4:15	8:27
30	16.2	4:14	8:29
31	16.3	4:13	8:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.31 kWh/m².

For context, solar energy here swings from a low near 0.57 kWh/m² to a high of 5.44 kWh/m² in June across the year — May's 5.31 kWh/m² sits near the top of that range.

	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)	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.9	Bright
2	4.9	Bright
3	5.0	Bright
4	5.0	Bright
5	5.0	Bright
6	5.1	Bright
7	5.1	Bright
8	5.1	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.2	Bright
13	5.2	Bright
14	5.2	Bright
15	5.2	Bright
16	5.3	Bright
17	5.3	Bright
18	5.3	Bright
19	5.3	Bright
20	5.3	Bright
21	5.3	Bright
22	5.3	Bright
23	5.4	Bright
24	5.4	Bright
25	5.4	Bright
26	5.4	Bright
27	5.4	Bright
28	5.5	Bright
29	5.5	Bright
30	5.5	Bright
31	5.5	Bright

Planning a trip in May

Is May a good time to visit Greystones?

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

3.0

Sightseeing

6th-best month of the year

—

Beach & pool

never really warm enough

May is a weaker month for outdoor sightseeing in Greystones.

What to pack for Greystones in May

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

In May, Greystones sees daytime highs around 12°C and nights near 9°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Greystones in May

The nearest coast averages about 10°C 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 13 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	9	8	8	9	10	12	14	15	15	14	12	11
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	9	Bracing
Feb	8	Bracing
Mar	8	Bracing
Apr	9	Bracing
May	10	Bracing
Jun	12	Bracing
Jul	14	Bracing
Aug	15	Bracing
Sep	15	Bracing
Oct	14	Bracing
Nov	12	Bracing
Dec	11	Bracing

UV index in Greystones in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Greystones 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	3	5	6	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	3	Moderate
May	5	High
Jun	6	High
Jul	5	High
Aug	6	High
Sep	4	Moderate
Oct	2	Low
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Greystones?

Greystones sits at 53.1°N, 6.1°W, 80 m above sea level, in Ireland. The nearest listed city is Bray, 7.0 km away.

Topography around Greystones

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

Within 3 km, the terrain around Greystones has only modest variations in elevation — a maximum elevation change of 220 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 721 m; within 80 km, large variations in elevation — a maximum elevation change of 946 m.

The land around Greystones is covered by water (43%) and grassland (25%) within 3 km, water (52%) and grassland (27%) within 16 km, and grassland (46%) and water (32%) within 80 km.

3 km

220 m

water 43%

16 km

721 m

water 52%

80 km

946 m

grassland 46%

treesgrasslandcroplandartificial surfacesbare terrainwater

← April Greystones year-round climate June →Best places to visit in May

May weather nearby: Bray 7.0 km · Dún Laoghaire 18 km · Sandyford 18 km · Rathfarnham 23 km · Templeogue 24 km · Dublin 25 km · South Dublin 25 km · Tallaght 26 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 Greystones (53.1408°, -6.0631°, elevation 80 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).

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

	Clearer (%)	Cloudier (%)
1	34	66
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	33	67
12	33	67
13	33	67
14	31	69
15	31	69
16	31	69
17	30	70
18	30	70
19	30	70
20	30	70
21	31	69
22	32	68
23	32	68
24	32	68
25	32	68
26	33	67
27	34	66
28	34	66
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	34	66
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	33	67
12	33	67
13	33	67
14	31	69
15	31	69
16	31	69
17	30	70
18	30	70
19	30	70
20	30	70
21	31	69
22	32	68
23	32	68
24	32	68
25	32	68
26	33	67
27	34	66
28	34	66
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	99	1
30	99	1
31	99	1

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

	Clearer (%)	Cloudier (%)
1	34	66
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	34	66
10	34	66
11	33	67
12	33	67
13	33	67
14	31	69
15	31	69
16	31	69
17	30	70
18	30	70
19	30	70
20	30	70
21	31	69
22	32	68
23	32	68
24	32	68
25	32	68
26	33	67
27	34	66
28	34	66
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	99	1
30	99	1
31	99	1