Saint Helier weather in May

In May, Saint Helier sees average daytime highs of 13°C and overnight lows near 11°C, with 53 mm of rain across 9.4 wet days and about 15 hours of daylight. It is the 6th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 14°C by the end. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of May to 15 h 42 min by month's end. Set against the rest of the year, May is Saint Helier's 6th-clearest and 9th-windiest month. For the whole year in context, see Saint Helier's year-round climate.

Daytime high: 13°; 6th warmest
Overnight low: 11°; 7th coldest
Rainfall: 53 mm; 9.4 wet days
Daylight: 15 h 06 min; 4:32 AM – 7:37 PM
Cloud cover: 60%; 6th clearest
Wind: 22 km/h; 9th windiest
Solar energy: 5.77 kWh/m²
Travel score: 3.8; out of 10

Saint Helier is one of the twelve parishes and capital of Jersey in the Channel Islands.

Density: 2,642/km²; people per km²

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

← April Saint Helier 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 12°C in the first days to 14°C by the end.

A typical May day in Saint Helier reaches about 13°C in the afternoon and slips back to 11°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 16°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)	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14	15	15
Avg low (°C)	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	13	13

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

Saint Helier weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	9° / 7°	110	15.8	8.5	1.5
Feb	9° / 7°	81	12.9	9.8	1.4
Mar	9° / 8°	69	12.4	11.6	1.9
Apr	11° / 9°	57	10.5	13.4	2.7
May	13° / 11°	53	9.4	15	3.8
Jun	16° / 14°	50	8.7	15.9	5.0
Jul	18° / 16°	48	9.1	15.6	6.0
Aug	18° / 17°	63	9.8	14.2	6.1
Sep	17° / 16°	77	11	12.4	5.5
Oct	15° / 13°	122	15.5	10.5	4.0
Nov	12° / 10°	132	17.6	8.9	2.7
Dec	10° / 8°	138	16.7	8.1	1.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up 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 (%)	40	40	40	41	41	40	41	41	42	42	42	43	43	44	44	45	46	47	47	47	47	48	49	49	49	49	49	48	48	48	47
Cloudier (%)	60	60	60	59	59	60	59	59	58	58	58	57	57	56	56	55	54	53	53	53	53	52	51	51	51	51	51	52	52	52	53

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	41	59
5	41	59
6	40	60
7	41	59
8	41	59
9	42	58
10	42	58
11	42	58
12	43	57
13	43	57
14	44	56
15	44	56
16	45	55
17	46	54
18	47	53
19	47	53
20	47	53
21	47	53
22	48	52
23	49	51
24	49	51
25	49	51
26	49	51
27	49	51
28	48	52
29	48	52
30	48	52
31	47	53

Chance of precipitation in May

Any precipitation

Saint Helier gets around 53 mm of rain over 9.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 35% 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 (%)	35	35	34	33	33	32	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	30	30	30	30	30	30	30

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

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 96% 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	99	99	99	99	98	98	97	96	96	95	94	93	92	91	90	90	89	88	87
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	3	4	4	5	6	7	8	9	10	10	11	12	13

	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	99	1
14	99	1
15	99	1
16	99	1
17	98	2
18	98	2
19	97	3
20	96	4
21	96	4
22	95	5
23	94	6
24	93	7
25	92	8
26	91	9
27	90	10
28	90	10
29	89	11
30	88	12
31	87	13

Wind in May

Winds average 22 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	22	22	22	22	22	22	22	22	22	22	22	22	22	22	22	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	22	breezy
14	22	breezy
15	22	breezy
16	22	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	22	breezy
28	21	breezy
29	21	breezy
30	21	breezy
31	21	breezy

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 18 min at the start of May to 15 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over May. Sunrise moves from 4:56 AM to 4:16 AM, and sunset from 7:15 PM to 7:56 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)	14.3	14.4	14.4	14.5	14.5	14.6	14.6	14.7	14.7	14.8	14.8	14.9	14.9	15.0	15.0	15.1	15.1	15.2	15.2	15.3	15.3	15.3	15.4	15.4	15.5	15.5	15.5	15.6	15.6	15.6	15.7
Sunrise (AM)	4:56	4:54	4:52	4:51	4:49	4:47	4:46	4:44	4:42	4:41	4:39	4:38	4:36	4:35	4:34	4:32	4:31	4:30	4:28	4:27	4:26	4:25	4:24	4:23	4:21	4:20	4:19	4:19	4:18	4:17	4:16
Sunset (PM)	7:15	7:17	7:18	7:20	7:21	7:23	7:24	7:26	7:27	7:29	7:30	7:32	7:33	7:34	7:36	7:37	7:38	7:40	7:41	7:42	7:44	7:45	7:46	7:48	7:49	7:50	7:51	7:52	7:53	7:55	7:56

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.3	4:56	7:15
2	14.4	4:54	7:17
3	14.4	4:52	7:18
4	14.5	4:51	7:20
5	14.5	4:49	7:21
6	14.6	4:47	7:23
7	14.6	4:46	7:24
8	14.7	4:44	7:26
9	14.7	4:42	7:27
10	14.8	4:41	7:29
11	14.8	4:39	7:30
12	14.9	4:38	7:32
13	14.9	4:36	7:33
14	15.0	4:35	7:34
15	15.0	4:34	7:36
16	15.1	4:32	7:37
17	15.1	4:31	7:38
18	15.2	4:30	7:40
19	15.2	4:28	7:41
20	15.3	4:27	7:42
21	15.3	4:26	7:44
22	15.3	4:25	7:45
23	15.4	4:24	7:46
24	15.4	4:23	7:48
25	15.5	4:21	7:49
26	15.5	4:20	7:50
27	15.5	4:19	7:51
28	15.6	4:19	7:52
29	15.6	4:18	7:53
30	15.6	4:17	7:55
31	15.7	4:16	7:56

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.77 kWh/m².

For context, solar energy here swings from a low near 0.83 kWh/m² to a high of 6.27 kWh/m² in June across the year — May's 5.77 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)	5.3	5.3	5.3	5.4	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1
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	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.3	Bright
2	5.3	Bright
3	5.3	Bright
4	5.4	Bright
5	5.4	Bright
6	5.4	Bright
7	5.5	Bright
8	5.5	Bright
9	5.5	Bright
10	5.6	Bright
11	5.6	Bright
12	5.6	Bright
13	5.7	Bright
14	5.7	Bright
15	5.7	Bright
16	5.8	Bright
17	5.8	Bright
18	5.8	Bright
19	5.8	Bright
20	5.9	Bright
21	5.9	Bright
22	5.9	Bright
23	6.0	Bright
24	6.0	Bright
25	6.0	Intense
26	6.0	Intense
27	6.0	Intense
28	6.1	Intense
29	6.1	Intense
30	6.1	Intense
31	6.1	Intense

Planning a trip in May

Hazard calendar for Saint Helier

In seasonPeak

None of Saint Helier's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Saint Helier's rainy season runs August–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Saint Helier?

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

3.8

Sightseeing

6th-best month of the year

0.0

Beach & pool

6th-best month of the year

May is a weaker month for outdoor sightseeing in Saint Helier.

What to pack for Saint Helier in May

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

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

a warm layerrain gearsun protectiona windbreaker

Sea temperature near Saint Helier in May

The nearest coast averages about 12°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 18°C and coldest in February near 9°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)	10	9	9	10	12	15	17	18	18	16	14	11
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	10	Bracing
Feb	9	Bracing
Mar	9	Bracing
Apr	10	Bracing
May	12	Bracing
Jun	15	Bracing
Jul	17	Cool
Aug	18	Cool
Sep	18	Cool
Oct	16	Cool
Nov	14	Bracing
Dec	11	Bracing

UV index in Saint Helier in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Saint Helier peaks around August 13 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. 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	2	3	5	6	7	6	7	5	3	1	1
Level	Low	Low	Moderate	Moderate	High	High	High	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	3	Moderate
Apr	5	Moderate
May	6	High
Jun	7	High
Jul	6	High
Aug	7	High
Sep	5	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Saint Helier?

Saint Helier sits at 49.2°N, 2.1°W, 11 m above sea level, in Jersey. The nearest listed city is Saint Peter Port, 43 km away.

Topography around Saint Helier

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

Within 3 km, the terrain around Saint Helier has only modest variations in elevation — a maximum elevation change of 100 m around an average of 31 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 137 m; within 80 km, significant variations in elevation — a maximum elevation change of 290 m.

The land around Saint Helier is covered by water (32%), trees (22%) and artificial surfaces (21%) within 3 km, water (85%) within 16 km, and water (68%) within 80 km.

3 km

100 m

water 32%

16 km

137 m

water 85%

80 km

290 m

water 68%

treesgrasslandcroplandartificial surfacesbare terrainwater

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

May weather nearby: Saint Peter Port 43 km · Octeville 59 km · Saint-Malo 61 km · Équeurdreville-Hainneville 61 km · Cherbourg 61 km · Tourlaville 63 km · Saint-Lô 74 km · Saint-Brieuc 89 km

Jersey travel facts

Power plugs: Type G; 230 V · 50 Hz
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 Saint Helier (49.188°, -2.1049°, elevation 11 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	12	10
2	12	10
3	12	10
4	12	10
5	12	10
6	12	11
7	13	11
8	13	11
9	13	11
10	13	11
11	13	11
12	13	11
13	13	11
14	13	11
15	13	11
16	13	11
17	13	11
18	13	11
19	14	12
20	14	12
21	14	12
22	14	12
23	14	12
24	14	12
25	14	12
26	14	12
27	14	12
28	14	12
29	14	12
30	15	13
31	15	13

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	41	59
5	41	59
6	40	60
7	41	59
8	41	59
9	42	58
10	42	58
11	42	58
12	43	57
13	43	57
14	44	56
15	44	56
16	45	55
17	46	54
18	47	53
19	47	53
20	47	53
21	47	53
22	48	52
23	49	51
24	49	51
25	49	51
26	49	51
27	49	51
28	48	52
29	48	52
30	48	52
31	47	53

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

	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	99	1
14	99	1
15	99	1
16	99	1
17	98	2
18	98	2
19	97	3
20	96	4
21	96	4
22	95	5
23	94	6
24	93	7
25	92	8
26	91	9
27	90	10
28	90	10
29	89	11
30	88	12
31	87	13

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

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	41	59
5	41	59
6	40	60
7	41	59
8	41	59
9	42	58
10	42	58
11	42	58
12	43	57
13	43	57
14	44	56
15	44	56
16	45	55
17	46	54
18	47	53
19	47	53
20	47	53
21	47	53
22	48	52
23	49	51
24	49	51
25	49	51
26	49	51
27	49	51
28	48	52
29	48	52
30	48	52
31	47	53

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

	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	99	1
14	99	1
15	99	1
16	99	1
17	98	2
18	98	2
19	97	3
20	96	4
21	96	4
22	95	5
23	94	6
24	93	7
25	92	8
26	91	9
27	90	10
28	90	10
29	89	11
30	88	12
31	87	13

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

	Clearer (%)	Cloudier (%)
1	40	60
2	40	60
3	40	60
4	41	59
5	41	59
6	40	60
7	41	59
8	41	59
9	42	58
10	42	58
11	42	58
12	43	57
13	43	57
14	44	56
15	44	56
16	45	55
17	46	54
18	47	53
19	47	53
20	47	53
21	47	53
22	48	52
23	49	51
24	49	51
25	49	51
26	49	51
27	49	51
28	48	52
29	48	52
30	48	52
31	47	53

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

	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	99	1
14	99	1
15	99	1
16	99	1
17	98	2
18	98	2
19	97	3
20	96	4
21	96	4
22	95	5
23	94	6
24	93	7
25	92	8
26	91	9
27	90	10
28	90	10
29	89	11
30	88	12
31	87	13