Coleraine weather in May

In May, Coleraine sees average daytime highs of 11°C and overnight lows near 9°C, with 71 mm of rain across 13.4 wet days and about 15.8 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 12°C by the end. The sky is clear or mostly clear about 20% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 54 min at the start of May to 16 h 36 min by month's end. Set against the rest of the year, May is Coleraine's 1st-clearest and 9th-windiest month. For the whole year in context, see Coleraine's year-round climate.

Daytime high: 11°; 6th warmest
Overnight low: 9°; 7th coldest
Rainfall: 71 mm; 13.4 wet days
Daylight: 15 h 54 min; 4:26 AM – 8:19 PM
Cloud cover: 66%; 1st clearest
Wind: 23 km/h; 9th windiest
Solar energy: 5 kWh/m²
Travel score: 2.3; out of 10

Coleraine is town and civil parish in County Londonderry, Northern Ireland.

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

← April Coleraine 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 10°C in the first days to 12°C by the end.

A typical May day in Coleraine reaches about 11°C in the afternoon and slips back to 9°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 13°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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12
Avg low (°C)	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	9	9	9	9	9	10	10	10	10	10	10

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

Coleraine 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° / 6°	124	20.3	0.6	7.5	1.0
Feb	8° / 5°	100	16.9	1	9.2	0.9
Mar	8° / 6°	91	16	0.8	11.4	1.1
Apr	9° / 7°	78	13.9	0.2	13.8	1.6
May	11° / 9°	71	13.4	0	15.8	2.3
Jun	13° / 11°	86	14.6	0	17	2.9
Jul	14° / 13°	95	16.1	0	16.5	3.5
Aug	15° / 13°	104	16.2	0	14.7	3.7
Sep	14° / 12°	101	16.3	0	12.5	3.5
Oct	12° / 10°	139	18.9	0	10.2	2.6
Nov	10° / 8°	149	20.8	0.2	8.1	1.7
Dec	9° / 6°	147	20	0.7	7	1.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

	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 (%)	41	42	42	44	44	43	43	44	43	43	41	41	39	39	37	37	37	37	35	35	34	34	34	34	35	35	36	36	36	36	35
Cloudier (%)	59	58	58	56	56	57	57	56	57	57	59	59	61	61	63	63	63	63	65	65	66	66	66	66	65	65	64	64	64	64	65

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	44	56
5	44	56
6	43	57
7	43	57
8	44	56
9	43	57
10	43	57
11	41	59
12	41	59
13	39	61
14	39	61
15	37	63
16	37	63
17	37	63
18	37	63
19	35	65
20	35	65
21	34	66
22	34	66
23	34	66
24	34	66
25	35	65
26	35	65
27	36	64
28	36	64
29	36	64
30	36	64
31	35	65

Chance of precipitation in May

Any precipitation

Coleraine gets around 71 mm of rain over 13.4 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 44% and peaks near 46% 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 (%)	45	45	45	44	44	44	43	43	44	44	44	45	45	46	46	46	46	45	45	45	45	45	45	44	44	44	43	43	43	42	42

	Rain chance (%)
1	45
2	45
3	45
4	44
5	44
6	44
7	43
8	43
9	44
10	44
11	44
12	45
13	45
14	46
15	46
16	46
17	46
18	45
19	45
20	45
21	45
22	45
23	45
24	44
25	44
26	44
27	43
28	43
29	43
30	42
31	42

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	100	100	100

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

Wind in May

Winds average 23 km/h in May.

Across May, daily wind ranges from about 21 km/h on the calmest days to 23 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)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 54 min at the start of May to 16 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over May. Sunrise moves from 4:57 AM to 4:05 AM, and sunset from 7:51 PM to 8:43 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)	14.9	15.0	15.0	15.1	15.2	15.2	15.3	15.4	15.4	15.5	15.6	15.6	15.7	15.8	15.8	15.9	15.9	16.0	16.1	16.1	16.2	16.2	16.3	16.3	16.4	16.4	16.5	16.5	16.6	16.6	16.6
Sunrise (AM)	4:57	4:54	4:52	4:50	4:48	4:46	4:44	4:42	4:40	4:38	4:36	4:34	4:32	4:30	4:28	4:26	4:25	4:23	4:21	4:20	4:18	4:17	4:15	4:14	4:12	4:11	4:10	4:08	4:07	4:06	4:05
Sunset (PM)	7:51	7:53	7:55	7:57	7:59	8:01	8:03	8:05	8:06	8:08	8:10	8:12	8:14	8:16	8:18	8:19	8:21	8:23	8:25	8:26	8:28	8:30	8:31	8:33	8:35	8:36	8:38	8:39	8:41	8:42	8:43

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.9	4:57	7:51
2	15.0	4:54	7:53
3	15.0	4:52	7:55
4	15.1	4:50	7:57
5	15.2	4:48	7:59
6	15.2	4:46	8:01
7	15.3	4:44	8:03
8	15.4	4:42	8:05
9	15.4	4:40	8:06
10	15.5	4:38	8:08
11	15.6	4:36	8:10
12	15.6	4:34	8:12
13	15.7	4:32	8:14
14	15.8	4:30	8:16
15	15.8	4:28	8:18
16	15.9	4:26	8:19
17	15.9	4:25	8:21
18	16.0	4:23	8:23
19	16.1	4:21	8:25
20	16.1	4:20	8:26
21	16.2	4:18	8:28
22	16.2	4:17	8:30
23	16.3	4:15	8:31
24	16.3	4:14	8:33
25	16.4	4:12	8:35
26	16.4	4:11	8:36
27	16.5	4:10	8:38
28	16.5	4:08	8:39
29	16.6	4:07	8:41
30	16.6	4:06	8:42
31	16.6	4:05	8:43

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5 kWh/m² in May across the year — May's 5 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)	4.6	4.6	4.7	4.7	4.8	4.8	4.8	4.8	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.1	5.2	5.2	5.2	5.2
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	4.6	Bright
2	4.6	Bright
3	4.7	Bright
4	4.7	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.8	Bright
9	4.9	Bright
10	4.9	Bright
11	4.9	Bright
12	4.9	Bright
13	4.9	Bright
14	4.9	Bright
15	4.9	Bright
16	4.9	Bright
17	5.0	Bright
18	5.0	Bright
19	5.0	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.0	Bright
24	5.1	Bright
25	5.1	Bright
26	5.1	Bright
27	5.1	Bright
28	5.2	Bright
29	5.2	Bright
30	5.2	Bright
31	5.2	Bright

Planning a trip in May

Is May a good time to visit Coleraine?

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

2.3

Sightseeing

6th-best month of the year

—

Beach & pool

never really warm enough

May is a weaker month for outdoor sightseeing in Coleraine.

What to pack for Coleraine in May

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

In May, Coleraine sees daytime highs around 11°C and nights near 9°C. Pack a warm layer. Worth having: rain gear, sun protection and a windbreaker. About 13 days see rain.

a warm layerrain gearsun protectiona windbreaker

Sea temperature near Coleraine in May

The nearest coast averages about 9°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 27 km away) is warmest in September at about 14°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	8	9	11	13	14	14	13	12	10
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	8	Bracing
May	9	Bracing
Jun	11	Bracing
Jul	13	Bracing
Aug	14	Bracing
Sep	14	Bracing
Oct	13	Bracing
Nov	12	Bracing
Dec	10	Bracing

UV index in Coleraine 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 Coleraine peaks around July 12 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 5 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	5	5	5	4	3	2	1	0
Level	Low	Low	Moderate	Moderate	High	Moderate	High	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Moderate
Apr	3	Moderate
May	5	High
Jun	5	Moderate
Jul	5	High
Aug	4	Moderate
Sep	3	Moderate
Oct	2	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Coleraine?

Coleraine sits at 55.1°N, 6.7°W, 5 m above sea level, in United Kingdom. The nearest listed city is Ballymena, 39 km away.

Topography around Coleraine

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

Within 3 km, the terrain around Coleraine has only modest variations in elevation — a maximum elevation change of 82 m around an average of 30 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 385 m; within 80 km, large variations in elevation — a maximum elevation change of 675 m.

The land around Coleraine is covered by grassland (54%) and trees (22%) within 3 km, grassland (57%) and water (24%) within 16 km, and grassland (46%) and water (46%) within 80 km.

3 km

82 m

grassland 54%

16 km

385 m

grassland 57%

80 km

675 m

grassland 46%

treesgrasslandcroplandartificial surfaceswater

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

May weather nearby: Ballymena 39 km · Derry 44 km · Londonderry County Borough 44 km · Antrim 55 km · Larne 63 km · Letterkenny 71 km · Newtownabbey 72 km · Omagh 72 km

United Kingdom travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type D / G / M; 230 V · 50 Hz
Prices: ≈ 89% of US; price level, 2025
GDP per capita: $57,602; 2025
Happiness: 6.7 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1.1; per 100k, 2021
Road deaths: 3.2; 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 Coleraine (55.1333°, -6.6667°, elevation 5 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	10	8
2	10	8
3	10	8
4	10	8
5	10	8
6	10	8
7	10	8
8	10	8
9	10	8
10	10	8
11	10	8
12	10	8
13	10	9
14	10	9
15	11	9
16	11	9
17	11	9
18	11	9
19	11	9
20	11	9
21	11	9
22	11	9
23	11	9
24	11	9
25	11	9
26	11	10
27	11	10
28	11	10
29	12	10
30	12	10
31	12	10

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	44	56
5	44	56
6	43	57
7	43	57
8	44	56
9	43	57
10	43	57
11	41	59
12	41	59
13	39	61
14	39	61
15	37	63
16	37	63
17	37	63
18	37	63
19	35	65
20	35	65
21	34	66
22	34	66
23	34	66
24	34	66
25	35	65
26	35	65
27	36	64
28	36	64
29	36	64
30	36	64
31	35	65

	Rain chance (%)
1	45
2	45
3	45
4	44
5	44
6	44
7	43
8	43
9	44
10	44
11	44
12	45
13	45
14	46
15	46
16	46
17	46
18	45
19	45
20	45
21	45
22	45
23	45
24	44
25	44
26	44
27	43
28	43
29	43
30	42
31	42

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

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

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	44	56
5	44	56
6	43	57
7	43	57
8	44	56
9	43	57
10	43	57
11	41	59
12	41	59
13	39	61
14	39	61
15	37	63
16	37	63
17	37	63
18	37	63
19	35	65
20	35	65
21	34	66
22	34	66
23	34	66
24	34	66
25	35	65
26	35	65
27	36	64
28	36	64
29	36	64
30	36	64
31	35	65

	Rain chance (%)
1	45
2	45
3	45
4	44
5	44
6	44
7	43
8	43
9	44
10	44
11	44
12	45
13	45
14	46
15	46
16	46
17	46
18	45
19	45
20	45
21	45
22	45
23	45
24	44
25	44
26	44
27	43
28	43
29	43
30	42
31	42

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

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

	Clearer (%)	Cloudier (%)
1	41	59
2	42	58
3	42	58
4	44	56
5	44	56
6	43	57
7	43	57
8	44	56
9	43	57
10	43	57
11	41	59
12	41	59
13	39	61
14	39	61
15	37	63
16	37	63
17	37	63
18	37	63
19	35	65
20	35	65
21	34	66
22	34	66
23	34	66
24	34	66
25	35	65
26	35	65
27	36	64
28	36	64
29	36	64
30	36	64
31	35	65

	Rain chance (%)
1	45
2	45
3	45
4	44
5	44
6	44
7	43
8	43
9	44
10	44
11	44
12	45
13	45
14	46
15	46
16	46
17	46
18	45
19	45
20	45
21	45
22	45
23	45
24	44
25	44
26	44
27	43
28	43
29	43
30	42
31	42

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