Lannion weather in August

In August, Lannion sees average daytime highs of 18°C and overnight lows near 15°C, with 50 mm of rain across 9.5 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 29% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 54 min at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Lannion's 2nd-clearest and 12th-windiest month. For the whole year in context, see Lannion's year-round climate.

Daytime high: 18°; 1st warmest
Overnight low: 15°; 12th coldest
Rainfall: 50 mm; 9.5 wet days
Daylight: 14 h 12 min; 6:13 AM – 8:23 PM
Cloud cover: 59%; 2nd clearest
Wind: 17 km/h; 12th windiest
Solar energy: 4.95 kWh/m²
Travel score: 6.1; out of 10

← July Lannion year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 18°C through the month.

A typical August day in Lannion reaches about 18°C in the afternoon and slips back to 15°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 20°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

	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)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
Avg low (°C)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15

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

Lannion weather by month

How August compares with the rest of the year at a glance. August is the 1st-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°	104	16.4	8.5	1.7
Feb	9° / 6°	87	14.2	9.8	1.6
Mar	10° / 7°	70	13.3	11.6	2.1
Apr	12° / 8°	70	11.7	13.4	2.8
May	14° / 11°	59	10.4	15	3.9
Jun	16° / 13°	48	8.7	15.9	5.1
Jul	18° / 15°	42	9	15.5	6.0
Aug	18° / 15°	50	9.5	14.2	6.1
Sep	17° / 14°	55	10	12.4	5.5
Oct	15° / 12°	97	15	10.5	4.0
Nov	12° / 10°	116	17.3	9	2.6
Dec	10° / 8°	128	17.5	8.1	1.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 52%.

	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 (%)	50	50	50	50	50	50	49	49	49	49	48	48	49	49	48	47	47	47	46	46	46	47	47	48	48	48	48	49	50	51	51
Cloudier (%)	50	50	50	50	50	50	51	51	51	51	52	52	51	51	52	53	53	53	54	54	54	53	53	52	52	52	52	51	50	49	49

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

Chance of precipitation in August

Any precipitation

Lannion gets around 50 mm of rain over 9.5 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 34% 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 (%)	26	27	27	27	28	28	28	29	29	30	30	31	31	31	32	32	33	33	33	34	33	33	33	32	31	31	30	30	29	29	28

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

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the comfortable band about 58% 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 (%)	17	17	17	18	18	18	19	19	19	19	19	19	19	20	20	20	20	20	21	21	22	23	25	26	28	30	31	33	34	35	37
Comfortable (%)	62	62	62	60	60	60	59	58	58	58	59	59	59	58	59	59	60	60	60	60	60	60	59	58	57	56	55	54	53	53	51
Humid (%)	21	21	21	22	22	22	22	23	23	23	22	22	22	22	21	21	20	20	19	19	18	17	16	16	15	14	14	13	13	12	12

	Dry (%)	Comfortable (%)	Humid (%)
1	17	62	21
2	17	62	21
3	17	62	21
4	18	60	22
5	18	60	22
6	18	60	22
7	19	59	22
8	19	58	23
9	19	58	23
10	19	58	23
11	19	59	22
12	19	59	22
13	19	59	22
14	20	58	22
15	20	59	21
16	20	59	21
17	20	60	20
18	20	60	20
19	21	60	19
20	21	60	19
21	22	60	18
22	23	60	17
23	25	59	16
24	26	58	16
25	28	57	15
26	30	56	14
27	31	55	14
28	33	54	13
29	34	53	13
30	35	53	12
31	37	51	12

Wind in August

Winds average 17 km/h in August, the calmest month.

Across August, daily wind ranges from about 17 km/h on the calmest days to 18 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)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	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	17	light breeze
2	17	light breeze
3	17	light breeze
4	17	light breeze
5	17	light breeze
6	17	light breeze
7	17	light breeze
8	17	light breeze
9	17	light breeze
10	17	light breeze
11	17	light breeze
12	17	light breeze
13	17	light breeze
14	17	light breeze
15	17	light breeze
16	17	light breeze
17	17	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 August

DaylightNight

Daylight runs from about 14 h 54 min at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over August. Sunrise moves from 5:52 AM to 6:34 AM, and sunset from 8:48 PM to 7:53 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	14.9	14.8	14.8	14.7	14.7	14.6	14.6	14.5	14.5	14.4	14.4	14.3	14.3	14.2	14.2	14.1	14.1	14.0	14.0	13.9	13.8	13.8	13.7	13.7	13.6	13.6	13.5	13.4	13.4	13.3
Sunrise (AM)	5:52	5:53	5:54	5:56	5:57	5:58	6:00	6:01	6:03	6:04	6:05	6:07	6:08	6:10	6:11	6:13	6:14	6:15	6:17	6:18	6:20	6:21	6:23	6:24	6:26	6:27	6:28	6:30	6:31	6:33	6:34
Sunset (PM)	8:48	8:47	8:45	8:44	8:42	8:40	8:39	8:37	8:36	8:34	8:32	8:30	8:29	8:27	8:25	8:23	8:21	8:20	8:18	8:16	8:14	8:12	8:10	8:08	8:06	8:04	8:02	8:00	7:58	7:56	7:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.9	5:52	8:48
2	14.9	5:53	8:47
3	14.8	5:54	8:45
4	14.8	5:56	8:44
5	14.7	5:57	8:42
6	14.7	5:58	8:40
7	14.6	6:00	8:39
8	14.6	6:01	8:37
9	14.5	6:03	8:36
10	14.5	6:04	8:34
11	14.4	6:05	8:32
12	14.4	6:07	8:30
13	14.3	6:08	8:29
14	14.3	6:10	8:27
15	14.2	6:11	8:25
16	14.2	6:13	8:23
17	14.1	6:14	8:21
18	14.1	6:15	8:20
19	14.0	6:17	8:18
20	14.0	6:18	8:16
21	13.9	6:20	8:14
22	13.8	6:21	8:12
23	13.8	6:23	8:10
24	13.7	6:24	8:08
25	13.7	6:26	8:06
26	13.6	6:27	8:04
27	13.6	6:28	8:02
28	13.5	6:30	8:00
29	13.4	6:31	7:58
30	13.4	6:33	7:56
31	13.3	6:34	7:53

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.95 kWh/m².

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.03 kWh/m² in June across the year — August's 4.95 kWh/m² falls in the middle.

	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)	5.5	5.4	5.4	5.4	5.3	5.3	5.3	5.3	5.2	5.2	5.2	5.1	5.1	5.0	5.0	5.0	4.9	4.9	4.8	4.8	4.8	4.7	4.7	4.7	4.6	4.6	4.6	4.5	4.5	4.5	4.4
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	5.5	Bright
2	5.4	Bright
3	5.4	Bright
4	5.4	Bright
5	5.3	Bright
6	5.3	Bright
7	5.3	Bright
8	5.3	Bright
9	5.2	Bright
10	5.2	Bright
11	5.2	Bright
12	5.1	Bright
13	5.1	Bright
14	5.0	Bright
15	5.0	Bright
16	5.0	Bright
17	4.9	Bright
18	4.9	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.7	Bright
23	4.7	Bright
24	4.7	Bright
25	4.6	Bright
26	4.6	Bright
27	4.6	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright
31	4.4	Bright

Planning a trip in August

Is August a good time to visit Lannion?

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

6.1

Sightseeing

1st-best month of the year

2.1

Beach & pool

1st-best month of the year

August is a reasonable time to visit Lannion for sightseeing.

What to pack for Lannion in August

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

In August, Lannion sees daytime highs around 18°C and nights near 15°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Lannion in August

The nearest coast averages about 17°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in August 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)	11	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	11	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 Lannion in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Lannion peaks around August 12 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 11 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 Lannion?

Lannion sits at 48.7°N, 3.5°W, 30 m above sea level, in France. The nearest listed city is Morlaix, 32 km away.

Topography around Lannion

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

Within 3 km, the terrain around Lannion has only modest variations in elevation — a maximum elevation change of 108 m around an average of 63 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, significant variations in elevation — a maximum elevation change of 381 m.

The land around Lannion is covered by trees (41%) and grassland (23%) within 3 km, trees (27%), water (27%) and cropland (23%) within 16 km, and water (41%), cropland (22%) and trees (21%) within 80 km.

3 km

108 m

trees 41%

16 km

186 m

trees 27%

80 km

381 m

water 41%

treesgrasslandcroplandartificial surfaceswater

← July Lannion year-round climate September →Best places to visit in August

August weather nearby: Morlaix 32 km · Saint-Brieuc 56 km · Landerneau 66 km · Pontivy 82 km · Brest 85 km · Quimper 95 km · Douarnenez 96 km · Concarneau 101 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 Lannion (48.7326°, -3.4566°, elevation 30 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	18	15
2	18	15
3	18	15
4	18	15
5	18	15
6	18	15
7	18	15
8	18	15
9	18	15
10	18	15
11	18	15
12	18	15
13	18	15
14	18	15
15	18	15
16	18	15
17	18	15
18	18	15
19	18	15
20	18	15
21	18	15
22	18	15
23	18	15
24	18	15
25	18	15
26	18	15
27	18	15
28	18	15
29	18	15
30	18	15
31	18	15

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	17	62	21
2	17	62	21
3	17	62	21
4	18	60	22
5	18	60	22
6	18	60	22
7	19	59	22
8	19	58	23
9	19	58	23
10	19	58	23
11	19	59	22
12	19	59	22
13	19	59	22
14	20	58	22
15	20	59	21
16	20	59	21
17	20	60	20
18	20	60	20
19	21	60	19
20	21	60	19
21	22	60	18
22	23	60	17
23	25	59	16
24	26	58	16
25	28	57	15
26	30	56	14
27	31	55	14
28	33	54	13
29	34	53	13
30	35	53	12
31	37	51	12

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

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	17	62	21
2	17	62	21
3	17	62	21
4	18	60	22
5	18	60	22
6	18	60	22
7	19	59	22
8	19	58	23
9	19	58	23
10	19	58	23
11	19	59	22
12	19	59	22
13	19	59	22
14	20	58	22
15	20	59	21
16	20	59	21
17	20	60	20
18	20	60	20
19	21	60	19
20	21	60	19
21	22	60	18
22	23	60	17
23	25	59	16
24	26	58	16
25	28	57	15
26	30	56	14
27	31	55	14
28	33	54	13
29	34	53	13
30	35	53	12
31	37	51	12

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

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	17	62	21
2	17	62	21
3	17	62	21
4	18	60	22
5	18	60	22
6	18	60	22
7	19	59	22
8	19	58	23
9	19	58	23
10	19	58	23
11	19	59	22
12	19	59	22
13	19	59	22
14	20	58	22
15	20	59	21
16	20	59	21
17	20	60	20
18	20	60	20
19	21	60	19
20	21	60	19
21	22	60	18
22	23	60	17
23	25	59	16
24	26	58	16
25	28	57	15
26	30	56	14
27	31	55	14
28	33	54	13
29	34	53	13
30	35	53	12
31	37	51	12