Brest weather in May

In May, Brest sees average daytime highs of 15°C and overnight lows near 10°C, with 59 mm of rain across 10.6 wet days and about 15 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 16°C by the end. The sky is clear or mostly clear about 21% 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 36 min by month's end. Set against the rest of the year, May is Brest's 6th-clearest and 8th-windiest month. For the whole year in context, see Brest's year-round climate.

Daytime high: 15°; 6th warmest
Overnight low: 10°; 7th coldest
Rainfall: 59 mm; 10.6 wet days
Daylight: 15 hours; 5:44 AM – 8:44 PM
Cloud cover: 65%; 6th clearest
Wind: 18 km/h; 8th windiest
Solar energy: 5.93 kWh/m²
Travel score: 4.4; out of 10

Brest is port city in the Finistère department, Brittany, France.

Air quality: Good; PM2.5 7.5 µg/m³ · 2019
Density: 2,927/km²; people per km²

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

← April Brest 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 14°C in the first days to 16°C by the end.

A typical May day in Brest reaches about 15°C in the afternoon and slips back to 10°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 18°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)	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	16	16	16
Avg low (°C)	9	9	9	9	9	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

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

Brest weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	10° / 7°	99	15.3	8.6	1.8
Feb	10° / 6°	79	13.3	9.9	1.8
Mar	11° / 7°	64	12.6	11.6	2.5
Apr	13° / 8°	66	11.9	13.4	3.2
May	15° / 10°	59	10.6	15	4.4
Jun	17° / 13°	47	9.7	15.8	5.5
Jul	19° / 14°	45	10.1	15.5	6.1
Aug	19° / 14°	53	10	14.1	6.1
Sep	18° / 13°	52	9.6	12.4	5.8
Oct	15° / 11°	92	14.1	10.6	4.1
Nov	12° / 9°	96	14.9	9	2.9
Dec	11° / 7°	106	15.3	8.2	2.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% 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 62%. 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 (%)	37	36	36	36	36	35	36	36	36	36	37	37	36	37	37	37	37	38	38	39	38	39	40	40	40	41	41	41	40	41	41
Cloudier (%)	63	64	64	64	64	65	64	64	64	64	63	63	64	63	63	63	63	62	62	61	62	61	60	60	60	59	59	59	60	59	59

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	35	65
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	36	64
14	37	63
15	37	63
16	37	63
17	37	63
18	38	62
19	38	62
20	39	61
21	38	62
22	39	61
23	40	60
24	40	60
25	40	60
26	41	59
27	41	59
28	41	59
29	40	60
30	41	59
31	41	59

Chance of precipitation in May

Any precipitation

Brest gets around 59 mm of rain over 10.6 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 36% and peaks near 42% 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 (%)	42	41	41	40	39	38	38	37	37	36	36	36	36	35	35	35	35	35	34	34	34	33	33	33	32	32	32	32	33	33	34

	Rain chance (%)
1	42
2	41
3	41
4	40
5	39
6	38
7	38
8	37
9	37
10	36
11	36
12	36
13	36
14	35
15	35
16	35
17	35
18	35
19	34
20	34
21	34
22	33
23	33
24	33
25	32
26	32
27	32
28	32
29	33
30	33
31	34

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

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

Wind in May

Winds average 18 km/h in May.

Across May, daily wind ranges from about 18 km/h on the calmest days to 19 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)	19	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
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	19	light breeze
2	19	light breeze
3	19	light breeze
4	19	light breeze
5	19	light breeze
6	19	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	18	light breeze
17	18	light breeze
18	18	light breeze
19	18	light breeze
20	18	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 18 min at the start of May to 15 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over May. Sunrise moves from 6:07 AM to 5:29 AM, and sunset from 8:23 PM to 9:02 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	14.3	14.4	14.4	14.5	14.5	14.6	14.6	14.7	14.7	14.8	14.8	14.9	14.9	14.9	15.0	15.0	15.1	15.1	15.2	15.2	15.2	15.3	15.3	15.4	15.4	15.4	15.5	15.5	15.5	15.6
Sunrise (AM)	6:07	6:06	6:04	6:02	6:01	5:59	5:57	5:56	5:54	5:53	5:51	5:50	5:49	5:47	5:46	5:44	5:43	5:42	5:41	5:39	5:38	5:37	5:36	5:35	5:34	5:33	5:32	5:31	5:30	5:30	5:29
Sunset (PM)	8:23	8:24	8:26	8:27	8:29	8:30	8:32	8:33	8:34	8:36	8:37	8:39	8:40	8:41	8:43	8:44	8:45	8:47	8:48	8:49	8:50	8:52	8:53	8:54	8:55	8:56	8:58	8:59	9:00	9:01	9:02

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.3	6:07	8:23
2	14.3	6:06	8:24
3	14.4	6:04	8:26
4	14.4	6:02	8:27
5	14.5	6:01	8:29
6	14.5	5:59	8:30
7	14.6	5:57	8:32
8	14.6	5:56	8:33
9	14.7	5:54	8:34
10	14.7	5:53	8:36
11	14.8	5:51	8:37
12	14.8	5:50	8:39
13	14.9	5:49	8:40
14	14.9	5:47	8:41
15	14.9	5:46	8:43
16	15.0	5:44	8:44
17	15.0	5:43	8:45
18	15.1	5:42	8:47
19	15.1	5:41	8:48
20	15.2	5:39	8:49
21	15.2	5:38	8:50
22	15.2	5:37	8:52
23	15.3	5:36	8:53
24	15.3	5:35	8:54
25	15.4	5:34	8:55
26	15.4	5:33	8:56
27	15.4	5:32	8:58
28	15.5	5:31	8:59
29	15.5	5:30	9:00
30	15.5	5:30	9:01
31	15.6	5:29	9:02

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.93 kWh/m².

For context, solar energy here swings from a low near 0.89 kWh/m² to a high of 6.38 kWh/m² in June across the year — May's 5.93 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	5.5	5.5	5.5	5.6	5.6	5.6	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	6.1	6.2	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	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

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

Planning a trip in May

Is May a good time to visit Brest?

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

4.4

Sightseeing

5th-best month of the year

0.2

Beach & pool

6th-best month of the year

May is a reasonable time to visit Brest for sightseeing.

What to pack for Brest in May

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

In May, Brest sees daytime highs around 15°C and nights near 10°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Brest in May

The nearest coast averages about 13°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 16°C and coldest in February near 10°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)	11	10	10	11	13	14	15	16	15	15	14	12
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	11	Bracing
Feb	10	Bracing
Mar	10	Bracing
Apr	11	Bracing
May	13	Bracing
Jun	14	Bracing
Jul	15	Cool
Aug	16	Cool
Sep	15	Cool
Oct	15	Bracing
Nov	14	Bracing
Dec	12	Bracing

UV index in Brest 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 Brest peaks around August 14 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 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	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	1	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 Brest?

Brest sits at 48.4°N, 4.5°W, 49 m above sea level, in France. The nearest listed city is Landerneau, 19 km away.

Topography around Brest

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

Within 3 km, the terrain around Brest has only modest variations in elevation — a maximum elevation change of 109 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 182 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Brest is covered by artificial surfaces (46%), water (28%) and trees (22%) within 3 km, trees (27%), water (25%) and cropland (21%) within 16 km, and water (56%) within 80 km.

3 km

109 m

artificial surfaces 46%

16 km

182 m

trees 27%

80 km

384 m

water 56%

treesgrasslandcroplandartificial surfaceswater

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

May weather nearby: Landerneau 19 km · Douarnenez 35 km · Quimper 52 km · Morlaix 53 km · Concarneau 71 km · Lannion 85 km · Ploemeur 107 km · Lorient 109 km

France travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 77% of US; price level, 2025
GDP per capita: $48,986; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1.3; per 100k, 2023
Road deaths: 5.1; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 539
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 Brest (48.3903°, -4.4863°, elevation 49 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	14	9
2	14	9
3	14	9
4	14	9
5	14	9
6	14	10
7	14	10
8	14	10
9	14	10
10	14	10
11	14	10
12	15	10
13	15	10
14	15	10
15	15	10
16	15	10
17	15	10
18	15	10
19	15	10
20	15	11
21	15	11
22	16	11
23	16	11
24	16	11
25	16	11
26	16	11
27	16	11
28	16	11
29	16	11
30	16	11
31	16	11

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	35	65
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	36	64
14	37	63
15	37	63
16	37	63
17	37	63
18	38	62
19	38	62
20	39	61
21	38	62
22	39	61
23	40	60
24	40	60
25	40	60
26	41	59
27	41	59
28	41	59
29	40	60
30	41	59
31	41	59

	Rain chance (%)
1	42
2	41
3	41
4	40
5	39
6	38
7	38
8	37
9	37
10	36
11	36
12	36
13	36
14	35
15	35
16	35
17	35
18	35
19	34
20	34
21	34
22	33
23	33
24	33
25	32
26	32
27	32
28	32
29	33
30	33
31	34

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

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

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	35	65
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	36	64
14	37	63
15	37	63
16	37	63
17	37	63
18	38	62
19	38	62
20	39	61
21	38	62
22	39	61
23	40	60
24	40	60
25	40	60
26	41	59
27	41	59
28	41	59
29	40	60
30	41	59
31	41	59

	Rain chance (%)
1	42
2	41
3	41
4	40
5	39
6	38
7	38
8	37
9	37
10	36
11	36
12	36
13	36
14	35
15	35
16	35
17	35
18	35
19	34
20	34
21	34
22	33
23	33
24	33
25	32
26	32
27	32
28	32
29	33
30	33
31	34

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

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

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	35	65
7	36	64
8	36	64
9	36	64
10	36	64
11	37	63
12	37	63
13	36	64
14	37	63
15	37	63
16	37	63
17	37	63
18	38	62
19	38	62
20	39	61
21	38	62
22	39	61
23	40	60
24	40	60
25	40	60
26	41	59
27	41	59
28	41	59
29	40	60
30	41	59
31	41	59

	Rain chance (%)
1	42
2	41
3	41
4	40
5	39
6	38
7	38
8	37
9	37
10	36
11	36
12	36
13	36
14	35
15	35
16	35
17	35
18	35
19	34
20	34
21	34
22	33
23	33
24	33
25	32
26	32
27	32
28	32
29	33
30	33
31	34

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