Saint Peter Port weather in May

In May, Saint Peter Port sees average daytime highs of 13°C and overnight lows near 11°C, with 45 mm of rain across 7.9 wet days and about 15.1 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 13°C by the end. The sky is clear or mostly clear about 29% 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 Peter Port's 5th-clearest and 9th-windiest month. For the whole year in context, see Saint Peter Port's year-round climate.

Daytime high: 13°; 7th warmest
Overnight low: 11°; 7th coldest
Rainfall: 45 mm; 7.9 wet days
Daylight: 15 h 06 min; 4:33 AM – 7:40 PM
Cloud cover: 59%; 5th clearest
Wind: 24 km/h; 9th windiest
Solar energy: 5.89 kWh/m²
Travel score: 3.6; out of 10

Saint Peter Port is parish, port, and capital of Guernsey in the Channel Islands.

Density: 2,537/km²; people per km²

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

← April Saint Peter Port 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 13°C by the end.

A typical May day in Saint Peter Port 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 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)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	13	14	14
Avg low (°C)	10	10	10	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

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

Saint Peter Port weather by month

How May compares with the rest of the year at a glance. May is the 7th-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	10° / 8°	98	15.7	8.4	1.8
Feb	9° / 7°	74	13.3	9.8	1.7
Mar	10° / 8°	58	11.5	11.5	2.0
Apr	11° / 9°	50	9.7	13.4	2.6
May	13° / 11°	45	7.9	15.1	3.6
Jun	15° / 13°	42	7.5	16	4.7
Jul	17° / 15°	36	6.9	15.6	5.7
Aug	17° / 16°	50	8.6	14.2	5.9
Sep	17° / 15°	57	9.4	12.4	5.5
Oct	15° / 14°	107	15	10.5	4.1
Nov	13° / 11°	121	17.7	8.9	2.8
Dec	11° / 9°	121	17	8	2.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 53%.

	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 (%)	44	44	44	43	43	43	44	44	44	44	45	45	45	46	46	46	47	48	48	48	49	48	50	50	50	49	49	49	49	49	49
Cloudier (%)	56	56	56	57	57	57	56	56	56	56	55	55	55	54	54	54	53	52	52	52	51	52	50	50	50	51	51	51	51	51	51

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	43	57
5	43	57
6	43	57
7	44	56
8	44	56
9	44	56
10	44	56
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	46	54
17	47	53
18	48	52
19	48	52
20	48	52
21	49	51
22	48	52
23	50	50
24	50	50
25	50	50
26	49	51
27	49	51
28	49	51
29	49	51
30	49	51
31	49	51

Chance of precipitation in May

Any precipitation

Saint Peter Port gets around 45 mm of rain over 7.9 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 27% and peaks near 29% 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 (%)	29	29	28	28	27	26	26	26	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27	27	26	26	26	26	26	26	26

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

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 99% 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	99	99	99	99	98	98	97	97	97	96	96	95	95
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	3	3	3	4	4	5	5

	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	99	1
20	99	1
21	99	1
22	99	1
23	98	2
24	98	2
25	97	3
26	97	3
27	97	3
28	96	4
29	96	4
30	95	5
31	95	5

Wind in May

Winds average 24 km/h in May.

Across May, daily wind ranges from about 23 km/h on the calmest days to 25 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)	25	25	25	25	25	25	25	25	25	25	24	24	24	24	24	24	24	24	24	24	24	23	23	23	23	23	23	23	23	23	23
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	25	breezy
2	25	breezy
3	25	breezy
4	25	breezy
5	25	breezy
6	25	breezy
7	25	breezy
8	25	breezy
9	25	breezy
10	25	breezy
11	24	breezy
12	24	breezy
13	24	breezy
14	24	breezy
15	24	breezy
16	24	breezy
17	24	breezy
18	24	breezy
19	24	breezy
20	24	breezy
21	24	breezy
22	23	breezy
23	23	breezy
24	23	breezy
25	23	breezy
26	23	breezy
27	23	breezy
28	23	breezy
29	23	breezy
30	23	breezy
31	23	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 4:57 AM to 4:17 AM, and sunset from 7:18 PM to 7:58 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	14.5	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	15.2	15.3	15.3	15.4	15.4	15.5	15.5	15.5	15.6	15.6	15.6	15.7	15.7
Sunrise (AM)	4:57	4:55	4:53	4:52	4:50	4:48	4:47	4:45	4:43	4:42	4:40	4:39	4:37	4:36	4:34	4:33	4:32	4:30	4:29	4:28	4:27	4:25	4:24	4:23	4:22	4:21	4:20	4:19	4:18	4:17	4:17
Sunset (PM)	7:18	7:19	7:21	7:22	7:24	7:25	7:27	7:28	7:30	7:31	7:33	7:34	7:36	7:37	7:38	7:40	7:41	7:43	7:44	7:45	7:47	7:48	7:49	7:50	7:52	7:53	7:54	7:55	7:56	7:57	7:58

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.3	4:57	7:18
2	14.4	4:55	7:19
3	14.5	4:53	7:21
4	14.5	4:52	7:22
5	14.6	4:50	7:24
6	14.6	4:48	7:25
7	14.7	4:47	7:27
8	14.7	4:45	7:28
9	14.8	4:43	7:30
10	14.8	4:42	7:31
11	14.9	4:40	7:33
12	14.9	4:39	7:34
13	15.0	4:37	7:36
14	15.0	4:36	7:37
15	15.1	4:34	7:38
16	15.1	4:33	7:40
17	15.2	4:32	7:41
18	15.2	4:30	7:43
19	15.2	4:29	7:44
20	15.3	4:28	7:45
21	15.3	4:27	7:47
22	15.4	4:25	7:48
23	15.4	4:24	7:49
24	15.5	4:23	7:50
25	15.5	4:22	7:52
26	15.5	4:21	7:53
27	15.6	4:20	7:54
28	15.6	4:19	7:55
29	15.6	4:18	7:56
30	15.7	4:17	7:57
31	15.7	4:17	7:58

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.89 kWh/m².

For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 6.39 kWh/m² in June across the year — May's 5.89 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)	5.4	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.9	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1	6.2	6.2	6.2	6.2
Level	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	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.4	Bright
2	5.4	Bright
3	5.4	Bright
4	5.5	Bright
5	5.5	Bright
6	5.5	Bright
7	5.6	Bright
8	5.6	Bright
9	5.7	Bright
10	5.7	Bright
11	5.7	Bright
12	5.7	Bright
13	5.8	Bright
14	5.8	Bright
15	5.8	Bright
16	5.9	Bright
17	5.9	Bright
18	5.9	Bright
19	5.9	Bright
20	6.0	Bright
21	6.0	Intense
22	6.0	Intense
23	6.0	Intense
24	6.1	Intense
25	6.1	Intense
26	6.1	Intense
27	6.1	Intense
28	6.2	Intense
29	6.2	Intense
30	6.2	Intense
31	6.2	Intense

Planning a trip in May

Hazard calendar for Saint Peter Port

In seasonPeak

None of Saint Peter Port'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 Peter Port's rainy season runs September–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 Peter Port?

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

3.6

Sightseeing

6th-best month of the year

0.0

Beach & pool

7th-best month of the year

May is a weaker month for outdoor sightseeing in Saint Peter Port.

What to pack for Saint Peter Port in May

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

In May, Saint Peter Port sees daytime highs around 13°C and nights near 11°C. Worth packing: a warm layer, sun protection and a windbreaker. About 8 days see rain.

a warm layersun protectiona windbreaker

Sea temperature near Saint Peter Port 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 September at about 17°C and coldest in March 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	10	9	10	12	14	16	17	17	16	14	12
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing

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

UV index in Saint Peter Port 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 Peter Port peaks around August 12 at about 6 (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	1	3	5	6	6	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	1	Low
Mar	3	Moderate
Apr	5	Moderate
May	6	High
Jun	6	High
Jul	6	High
Aug	7	High
Sep	5	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Location & terrain

Where is Saint Peter Port?

Saint Peter Port sits at 49.5°N, 2.5°W, 10 m above sea level, in Guernsey. The nearest listed city is Saint Helier, 43 km away.

Topography around Saint Peter Port

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

Within 3 km, the terrain around Saint Peter Port has only modest variations in elevation — a maximum elevation change of 105 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 108 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.

The land around Saint Peter Port is covered by water (41%) and trees (25%) within 3 km, water (91%) within 16 km, and water (88%) within 80 km.

3 km

105 m

water 41%

16 km

108 m

water 91%

80 km

191 m

water 88%

treesgrasslandcroplandartificial surfaceswater

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

May weather nearby: Saint Helier 43 km · Octeville 67 km · Équeurdreville-Hainneville 67 km · Cherbourg 69 km · Tourlaville 73 km · Saint-Malo 98 km · Lannion 105 km · Saint-Brieuc 106 km

Guernsey travel facts

Power plugs: Type G; 230 V · 50 Hz

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 Peter Port (49.4598°, -2.5353°, elevation 10 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	10
7	12	10
8	12	10
9	12	11
10	12	11
11	12	11
12	12	11
13	12	11
14	12	11
15	12	11
16	12	11
17	13	11
18	13	11
19	13	11
20	13	11
21	13	11
22	13	12
23	13	12
24	13	12
25	13	12
26	13	12
27	13	12
28	13	12
29	13	12
30	14	12
31	14	12

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	43	57
5	43	57
6	43	57
7	44	56
8	44	56
9	44	56
10	44	56
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	46	54
17	47	53
18	48	52
19	48	52
20	48	52
21	49	51
22	48	52
23	50	50
24	50	50
25	50	50
26	49	51
27	49	51
28	49	51
29	49	51
30	49	51
31	49	51

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

	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	99	1
20	99	1
21	99	1
22	99	1
23	98	2
24	98	2
25	97	3
26	97	3
27	97	3
28	96	4
29	96	4
30	95	5
31	95	5

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

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	43	57
5	43	57
6	43	57
7	44	56
8	44	56
9	44	56
10	44	56
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	46	54
17	47	53
18	48	52
19	48	52
20	48	52
21	49	51
22	48	52
23	50	50
24	50	50
25	50	50
26	49	51
27	49	51
28	49	51
29	49	51
30	49	51
31	49	51

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

	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	99	1
20	99	1
21	99	1
22	99	1
23	98	2
24	98	2
25	97	3
26	97	3
27	97	3
28	96	4
29	96	4
30	95	5
31	95	5

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

	Clearer (%)	Cloudier (%)
1	44	56
2	44	56
3	44	56
4	43	57
5	43	57
6	43	57
7	44	56
8	44	56
9	44	56
10	44	56
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	46	54
17	47	53
18	48	52
19	48	52
20	48	52
21	49	51
22	48	52
23	50	50
24	50	50
25	50	50
26	49	51
27	49	51
28	49	51
29	49	51
30	49	51
31	49	51

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

	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	99	1
20	99	1
21	99	1
22	99	1
23	98	2
24	98	2
25	97	3
26	97	3
27	97	3
28	96	4
29	96	4
30	95	5
31	95	5