Douarnenez weather in September

In September, Douarnenez sees average daytime highs of 17°C and overnight lows near 15°C, with 60 mm of rain across 9.3 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 17°C by the end. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Douarnenez's 3rd-clearest and 9th-windiest month. For the whole year in context, see Douarnenez's year-round climate.

Daytime high: 17°; 3rd warmest
Overnight low: 15°; 10th coldest
Rainfall: 60 mm; 9.3 wet days
Daylight: 12 h 18 min; 7:01 AM – 7:22 PM
Cloud cover: 57%; 3rd clearest
Wind: 18 km/h; 9th windiest
Solar energy: 3.81 kWh/m²
Travel score: 5.7; out of 10

← August Douarnenez year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 17°C by the end.

A typical September day in Douarnenez reaches about 17°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 15°C and 20°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

	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
Avg high (°C)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	16
Avg low (°C)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14

	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	17	15
16	17	14
17	17	14
18	17	14
19	17	14
20	17	14
21	17	14
22	17	14
23	17	14
24	17	14
25	17	14
26	17	14
27	17	14
28	17	14
29	17	14
30	16	14

Douarnenez weather by month

How September compares with the rest of the year at a glance. September is the 3rd-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°	115	15.7	8.6	1.8
Feb	9° / 7°	86	12.5	9.9	1.8
Mar	11° / 8°	70	12.4	11.6	2.3
Apr	12° / 9°	69	11	13.4	3.1
May	14° / 11°	58	9.9	14.9	4.3
Jun	17° / 14°	47	8.9	15.8	5.5
Jul	18° / 16°	47	9.3	15.4	6.2
Aug	19° / 16°	54	9	14.1	6.3
Sep	17° / 15°	60	9.3	12.4	5.7
Oct	15° / 13°	106	14.1	10.6	4.2
Nov	13° / 10°	117	15.9	9	2.9
Dec	11° / 8°	129	15.6	8.2	2.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 49%. 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
Clearer (%)	54	55	55	56	57	56	56	55	55	55	54	54	53	53	53	52	51	51	51	50	48	48	48	47	46	46	45	44	43	42
Cloudier (%)	46	45	45	44	43	44	44	45	45	45	46	46	47	47	47	48	49	49	49	50	52	52	52	53	54	54	55	56	57	58

	Clearer (%)	Cloudier (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	57	43
6	56	44
7	56	44
8	55	45
9	55	45
10	55	45
11	54	46
12	54	46
13	53	47
14	53	47
15	53	47
16	52	48
17	51	49
18	51	49
19	51	49
20	50	50
21	48	52
22	48	52
23	48	52
24	47	53
25	46	54
26	46	54
27	45	55
28	44	56
29	43	57
30	42	58

Chance of precipitation in September

Any precipitation

Douarnenez gets around 60 mm of rain over 9.3 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 44% on the wettest days. The odds climb 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
Rain chance (%)	25	25	25	24	25	25	25	25	26	26	27	27	28	28	29	30	30	31	32	33	34	36	37	38	40	41	42	43	44	44

	Rain chance (%)
1	25
2	25
3	25
4	24
5	25
6	25
7	25
8	25
9	26
10	26
11	27
12	27
13	28
14	28
15	29
16	30
17	30
18	31
19	32
20	33
21	34
22	36
23	37
24	38
25	40
26	41
27	42
28	43
29	44
30	44

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 48% 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
Dry (%)	34	35	36	37	38	39	41	42	43	44	45	46	47	48	49	50	51	51	52	53	53	54	54	54	55	55	56	56	56	58
Comfortable (%)	50	49	49	48	46	45	44	43	42	41	40	39	38	38	37	37	37	37	37	37	37	37	37	37	37	37	37	37	37	36
Humid (%)	16	15	15	15	15	15	15	15	15	15	15	15	15	14	14	13	12	12	11	10	10	9	9	9	8	8	7	7	7	6

	Dry (%)	Comfortable (%)	Humid (%)
1	34	50	16
2	35	49	15
3	36	49	15
4	37	48	15
5	38	46	15
6	39	45	15
7	41	44	15
8	42	43	15
9	43	42	15
10	44	41	15
11	45	40	15
12	46	39	15
13	47	38	15
14	48	38	14
15	49	37	14
16	50	37	13
17	51	37	12
18	51	37	12
19	52	37	11
20	53	37	10
21	53	37	10
22	54	37	9
23	54	37	9
24	54	37	9
25	55	37	8
26	55	37	8
27	56	37	7
28	56	37	7
29	56	37	7
30	58	36	6

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 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
Wind speed (km/h)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	19	19	19	20	20	20	20
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

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 6:40 AM to 7:21 AM, and sunset from 7:54 PM to 6:52 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
Daylight (h)	13.2	13.2	13.1	13.1	13.0	12.9	12.9	12.8	12.8	12.7	12.6	12.6	12.5	12.5	12.4	12.3	12.3	12.2	12.2	12.1	12.0	12.0	11.9	11.9	11.8	11.7	11.7	11.6	11.6	11.5
Sunrise (AM)	6:40	6:41	6:43	6:44	6:46	6:47	6:49	6:50	6:51	6:53	6:54	6:56	6:57	6:58	7:00	7:01	7:03	7:04	7:06	7:07	7:08	7:10	7:11	7:13	7:14	7:16	7:17	7:19	7:20	7:21
Sunset (PM)	7:54	7:52	7:50	7:48	7:46	7:43	7:41	7:39	7:37	7:35	7:33	7:31	7:28	7:26	7:24	7:22	7:20	7:18	7:15	7:13	7:11	7:09	7:07	7:05	7:02	7:00	6:58	6:56	6:54	6:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.2	6:40	7:54
2	13.2	6:41	7:52
3	13.1	6:43	7:50
4	13.1	6:44	7:48
5	13.0	6:46	7:46
6	12.9	6:47	7:43
7	12.9	6:49	7:41
8	12.8	6:50	7:39
9	12.8	6:51	7:37
10	12.7	6:53	7:35
11	12.6	6:54	7:33
12	12.6	6:56	7:31
13	12.5	6:57	7:28
14	12.5	6:58	7:26
15	12.4	7:00	7:24
16	12.3	7:01	7:22
17	12.3	7:03	7:20
18	12.2	7:04	7:18
19	12.2	7:06	7:15
20	12.1	7:07	7:13
21	12.0	7:08	7:11
22	12.0	7:10	7:09
23	11.9	7:11	7:07
24	11.9	7:13	7:05
25	11.8	7:14	7:02
26	11.7	7:16	7:00
27	11.7	7:17	6:58
28	11.6	7:19	6:56
29	11.6	7:20	6:54
30	11.5	7:21	6:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.81 kWh/m².

For context, solar energy here swings from a low near 0.91 kWh/m² to a high of 6.12 kWh/m² in June across the year — September's 3.81 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
Solar energy (kWh/m²)	4.5	4.5	4.4	4.4	4.3	4.3	4.2	4.2	4.1	4.1	4.0	4.0	3.9	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.5	3.5	3.4	3.3	3.3	3.2	3.2	3.1	3.0	3.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.5	Bright
2	4.5	Bright
3	4.4	Bright
4	4.4	Bright
5	4.3	Bright
6	4.3	Bright
7	4.2	Bright
8	4.2	Bright
9	4.1	Bright
10	4.1	Bright
11	4.0	Bright
12	4.0	Moderate
13	3.9	Moderate
14	3.9	Moderate
15	3.8	Moderate
16	3.8	Moderate
17	3.7	Moderate
18	3.7	Moderate
19	3.6	Moderate
20	3.6	Moderate
21	3.5	Moderate
22	3.5	Moderate
23	3.4	Moderate
24	3.3	Moderate
25	3.3	Moderate
26	3.2	Moderate
27	3.2	Moderate
28	3.1	Moderate
29	3.0	Moderate
30	3.0	Moderate

Planning a trip in September

Is September a good time to visit Douarnenez?

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

5.7

Sightseeing

3rd-best month of the year

1.6

Beach & pool

3rd-best month of the year

September is a reasonable time to visit Douarnenez for sightseeing.

What to pack for Douarnenez in September

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

In September, Douarnenez sees daytime highs around 17°C and nights near 15°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Douarnenez in September

The nearest coast averages about 16°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) 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	15	16	16	16	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	15	Bracing
Jul	16	Cool
Aug	16	Cool
Sep	16	Cool
Oct	15	Bracing
Nov	14	Bracing
Dec	12	Bracing

UV index in Douarnenez in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Douarnenez 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 8 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	High	High	High	High	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	5	High
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 Douarnenez?

Douarnenez sits at 48.1°N, 4.3°W, 23 m above sea level, in France. The nearest listed city is Quimper, 20 km away.

Topography around Douarnenez

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

Within 3 km, the terrain around Douarnenez has only modest variations in elevation — a maximum elevation change of 94 m around an average of 25 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 329 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Douarnenez is covered by water (44%) and trees (27%) within 3 km, cropland (27%), water (27%) and trees (23%) within 16 km, and water (50%) within 80 km.

3 km

94 m

water 44%

16 km

329 m

cropland 27%

80 km

384 m

water 50%

treesgrasslandcroplandartificial surfaceswater

← August Douarnenez year-round climate October →Best places to visit in September

September weather nearby: Quimper 20 km · Brest 35 km · Concarneau 39 km · Landerneau 40 km · Morlaix 65 km · Ploemeur 78 km · Lorient 81 km · Lanester 82 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 Douarnenez (48.0954°, -4.329°, elevation 23 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	17	15
16	17	14
17	17	14
18	17	14
19	17	14
20	17	14
21	17	14
22	17	14
23	17	14
24	17	14
25	17	14
26	17	14
27	17	14
28	17	14
29	17	14
30	16	14

	Clearer (%)	Cloudier (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	57	43
6	56	44
7	56	44
8	55	45
9	55	45
10	55	45
11	54	46
12	54	46
13	53	47
14	53	47
15	53	47
16	52	48
17	51	49
18	51	49
19	51	49
20	50	50
21	48	52
22	48	52
23	48	52
24	47	53
25	46	54
26	46	54
27	45	55
28	44	56
29	43	57
30	42	58

	Rain chance (%)
1	25
2	25
3	25
4	24
5	25
6	25
7	25
8	25
9	26
10	26
11	27
12	27
13	28
14	28
15	29
16	30
17	30
18	31
19	32
20	33
21	34
22	36
23	37
24	38
25	40
26	41
27	42
28	43
29	44
30	44

	Dry (%)	Comfortable (%)	Humid (%)
1	34	50	16
2	35	49	15
3	36	49	15
4	37	48	15
5	38	46	15
6	39	45	15
7	41	44	15
8	42	43	15
9	43	42	15
10	44	41	15
11	45	40	15
12	46	39	15
13	47	38	15
14	48	38	14
15	49	37	14
16	50	37	13
17	51	37	12
18	51	37	12
19	52	37	11
20	53	37	10
21	53	37	10
22	54	37	9
23	54	37	9
24	54	37	9
25	55	37	8
26	55	37	8
27	56	37	7
28	56	37	7
29	56	37	7
30	58	36	6

	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	17	15
16	17	14
17	17	14
18	17	14
19	17	14
20	17	14
21	17	14
22	17	14
23	17	14
24	17	14
25	17	14
26	17	14
27	17	14
28	17	14
29	17	14
30	16	14

	Clearer (%)	Cloudier (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	57	43
6	56	44
7	56	44
8	55	45
9	55	45
10	55	45
11	54	46
12	54	46
13	53	47
14	53	47
15	53	47
16	52	48
17	51	49
18	51	49
19	51	49
20	50	50
21	48	52
22	48	52
23	48	52
24	47	53
25	46	54
26	46	54
27	45	55
28	44	56
29	43	57
30	42	58

	Rain chance (%)
1	25
2	25
3	25
4	24
5	25
6	25
7	25
8	25
9	26
10	26
11	27
12	27
13	28
14	28
15	29
16	30
17	30
18	31
19	32
20	33
21	34
22	36
23	37
24	38
25	40
26	41
27	42
28	43
29	44
30	44

	Dry (%)	Comfortable (%)	Humid (%)
1	34	50	16
2	35	49	15
3	36	49	15
4	37	48	15
5	38	46	15
6	39	45	15
7	41	44	15
8	42	43	15
9	43	42	15
10	44	41	15
11	45	40	15
12	46	39	15
13	47	38	15
14	48	38	14
15	49	37	14
16	50	37	13
17	51	37	12
18	51	37	12
19	52	37	11
20	53	37	10
21	53	37	10
22	54	37	9
23	54	37	9
24	54	37	9
25	55	37	8
26	55	37	8
27	56	37	7
28	56	37	7
29	56	37	7
30	58	36	6

	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	17	15
16	17	14
17	17	14
18	17	14
19	17	14
20	17	14
21	17	14
22	17	14
23	17	14
24	17	14
25	17	14
26	17	14
27	17	14
28	17	14
29	17	14
30	16	14

	Clearer (%)	Cloudier (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	57	43
6	56	44
7	56	44
8	55	45
9	55	45
10	55	45
11	54	46
12	54	46
13	53	47
14	53	47
15	53	47
16	52	48
17	51	49
18	51	49
19	51	49
20	50	50
21	48	52
22	48	52
23	48	52
24	47	53
25	46	54
26	46	54
27	45	55
28	44	56
29	43	57
30	42	58

	Rain chance (%)
1	25
2	25
3	25
4	24
5	25
6	25
7	25
8	25
9	26
10	26
11	27
12	27
13	28
14	28
15	29
16	30
17	30
18	31
19	32
20	33
21	34
22	36
23	37
24	38
25	40
26	41
27	42
28	43
29	44
30	44

	Dry (%)	Comfortable (%)	Humid (%)
1	34	50	16
2	35	49	15
3	36	49	15
4	37	48	15
5	38	46	15
6	39	45	15
7	41	44	15
8	42	43	15
9	43	42	15
10	44	41	15
11	45	40	15
12	46	39	15
13	47	38	15
14	48	38	14
15	49	37	14
16	50	37	13
17	51	37	12
18	51	37	12
19	52	37	11
20	53	37	10
21	53	37	10
22	54	37	9
23	54	37	9
24	54	37	9
25	55	37	8
26	55	37	8
27	56	37	7
28	56	37	7
29	56	37	7
30	58	36	6