Concarneau weather in September

In September, Concarneau sees average daytime highs of 19°C and overnight lows near 13°C, with 55 mm of rain across 9 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 24% 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 Concarneau's 2nd-clearest and 10th-windiest month. For the whole year in context, see Concarneau's year-round climate.

Daytime high
19°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
55 mm
9 wet days
Daylight
12 h 18 min
7:00 AM – 7:20 PM
Cloud cover
61%
2nd clearest
Wind
14 km/h
10th windiest
Solar energy
3.74 kWh/m²
Travel score
6.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 17°C by the end.

A typical September day in Concarneau reaches about 19°C in the afternoon and slips back to 13°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12014
22014
32014
42014
52014
62014
71914
81914
91913
101913
111913
121913
131913
141913
151913
161913
171913
181813
191813
201813
211813
221813
231812
241812
251812
261812
271812
281712
291712
301712

Concarneau weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan / 9213.38.61.7
Feb / 7311.29.91.8
Mar11° / 6111.111.62.7
Apr13° / 6511.513.43.6
May16° / 10°6011.214.94.7
Jun19° / 13°49915.76.0
Jul20° / 15°459.115.46.5
Aug20° / 15°519.514.16.4
Sep19° / 13°55912.46.1
Oct16° / 11°8813.210.64.4
Nov12° / 9113.79.12.9
Dec10° / 10313.68.32.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34555
44753
54753
64753
74753
84555
94555
104654
114555
124555
134555
144456
154456
164456
174456
184357
194456
204456
214456
224357
234258
244258
254159
264159
274060
283961
293961
303763

Chance of precipitation in September

Any precipitation

Concarneau gets around 55 mm of rain over 9 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 31% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
225
325
425
525
626
726
826
927
1027
1127
1228
1328
1429
1529
1630
1730
1831
1932
2033
2133
2234
2335
2436
2537
2638
2739
2840
2941
3041

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13847141
24046131
34145131
44244131
54443131
64542131
74641131
84740131
94839131
104938131
114937131
125136130
135235130
145235130
155434120
165434120
175534110
185534110
195634100
205634100
21563590
22563590
23563590
24563680
25563680
26573670
27573670
28573670
29593560
30593560

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light 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 6:39 AM to 7:20 AM, and sunset from 7:52 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:397:52
213.26:407:50
313.16:427:48
413.06:437:46
513.06:447:44
612.96:467:42
712.96:477:40
812.86:497:37
912.86:507:35
1012.76:517:33
1112.66:537:31
1212.66:547:29
1312.56:567:27
1412.56:577:25
1512.46:587:22
1612.37:007:20
1712.37:017:18
1812.27:037:16
1912.27:047:14
2012.17:057:12
2112.07:077:09
2212.07:087:07
2311.97:107:05
2411.97:117:03
2511.87:137:01
2611.77:146:59
2711.77:156:57
2811.67:176:55
2911.67:186:52
3011.57:206:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.74 kWh/m².

For context, solar energy here swings from a low near 0.92 kWh/m² to a high of 6 kWh/m² in June across the year — September's 3.74 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.1Bright
94.1Bright
104.0Bright
114.0Moderate
123.9Moderate
133.9Moderate
143.8Moderate
153.8Moderate
163.7Moderate
173.7Moderate
183.6Moderate
193.5Moderate
203.5Moderate
213.4Moderate
223.4Moderate
233.3Moderate
243.3Moderate
253.2Moderate
263.1Moderate
273.1Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Is September a good time to visit Concarneau?

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

6.1
Sightseeing
3rd-best month of the year
2.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Concarneau for sightseeing.

What to pack for Concarneau in September

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

In September, Concarneau sees daytime highs around 19°C and nights near 13°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Concarneau in September

The nearest coast averages about 17°C in September — 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 10°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar10Bracing
Apr12Bracing
May14Bracing
Jun16Cool
Jul17Cool
Aug18Cool
Sep17Cool
Oct16Cool
Nov14Bracing
Dec12Bracing

UV index in Concarneau 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 Concarneau 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5High
May6High
Jun7High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Concarneau?

Concarneau sits at 47.9°N, 3.9°W, 11 m above sea level, in France. The nearest listed city is Quimper, 19 km away.

Topography around Concarneau

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

Within 3 km, the terrain around Concarneau has only modest variations in elevation — a maximum elevation change of 84 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 170 m; within 80 km, significant variations in elevation — a maximum elevation change of 384 m.

The land around Concarneau is covered by water (40%) and trees (28%) within 3 km, water (34%) and trees (28%) within 16 km, and water (40%) and trees (25%) within 80 km.

3 km
84 m
16 km
170 m
80 km
384 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Quimper 19 km · Douarnenez 39 km · Ploemeur 40 km · Lorient 43 km · Lanester 45 km · Landerneau 69 km · Brest 71 km · Pontivy 74 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
Roman Catholic 47%none 33%Muslim 4%Protestant 2%

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 Concarneau (47.8754°, -3.919°, 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).