La Teste-de-Buch weather in September

In September, La Teste-de-Buch sees average daytime highs of 21°C and overnight lows near 17°C, with 66 mm of rain across 9 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is La Teste-de-Buch's 3rd-clearest and 10th-windiest month. For the whole year in context, see La Teste-de-Buch's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
17°
9th coldest
Rainfall
66 mm
9 wet days
Daylight
12 h 18 min
6:50 AM – 7:08 PM
Cloud cover
49%
3rd clearest
Wind
13 km/h
10th windiest
Solar energy
4.31 kWh/m²
Travel score
6.8
out of 10

La Teste-de-Buch is human settlement in France.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical September day in La Teste-de-Buch reaches about 21°C in the afternoon and slips back to 17°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12318
22318
32318
42318
52317
62217
72217
82217
92217
102217
112217
122217
132217
142217
152217
162116
172116
182116
192116
202116
212116
222116
232116
242116
252016
262016
272016
282015
292015
302015

La Teste-de-Buch weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 8112.392.3
Feb11° / 5910.110.12.5
Mar13° / 5610.611.63.7
Apr15° / 10°641113.24.5
May18° / 14°6210.514.65.8
Jun21° / 17°598.915.36.7
Jul23° / 19°427.4157.6
Aug24° / 19°507.813.97.6
Sep21° / 17°66912.36.8
Oct18° / 14°8111.110.75.7
Nov14° / 10°10613.79.43.6
Dec11° / 90138.72.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26436
36436
46436
56436
66337
76337
86238
96238
106139
116040
126040
135941
145941
155842
165941
175842
185842
195743
205743
215743
225644
235644
245545
255545
265446
275347
285347
295149
305149

Chance of precipitation in September

Any precipitation

La Teste-de-Buch gets around 66 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 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
226
326
427
527
627
728
828
929
1030
1130
1231
1331
1431
1532
1632
1732
1832
1932
2032
2133
2233
2333
2433
2533
2634
2734
2834
2934
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1153436141
2163535131
3173635121
4183634110
5183734110
6193733100
719383390
820383390
921393380
1021393270
1122393270
1222403260
1323403260
1424403150
1524403150
1625403040
1726403040
1827402940
1928402930
2028402830
2129402820
2230412820
2330412720
2431412720
2531412620
2632412620
2733402510
2834402510
2935402410
3036402310

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light 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
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over September. Sunrise moves from 6:32 AM to 7:07 AM, and sunset from 7:37 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:327:37
213.06:337:35
313.06:347:33
412.96:357:31
512.96:367:29
612.86:387:28
712.86:397:26
812.76:407:24
912.76:417:22
1012.66:427:20
1112.66:447:18
1212.56:457:16
1312.56:467:14
1412.46:477:12
1512.46:497:10
1612.36:507:08
1712.36:517:06
1812.26:527:04
1912.16:537:02
2012.16:557:00
2112.06:566:58
2212.06:576:56
2311.96:586:54
2411.97:006:52
2511.87:016:50
2611.87:026:48
2711.77:036:47
2811.77:056:45
2911.67:066:43
3011.67:076:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 1.26 kWh/m² to a high of 6.4 kWh/m² in June across the year — September's 4.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit La Teste-de-Buch?

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

6.8
Sightseeing
3rd-best month of the year
4.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit La Teste-de-Buch for sightseeing.

What to pack for La Teste-de-Buch in September

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

In September, La Teste-de-Buch sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near La Teste-de-Buch in September

The nearest coast averages about 20°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 18 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jul 7 to Sep 18 — about 2.4 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb12Bracing
Mar12Bracing
Apr13Bracing
May16Cool
Jun18Cool
Jul21Refreshing
Aug22Refreshing
Sep20Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in La Teste-de-Buch 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 La Teste-de-Buch peaks around July 18 at about 8 (very 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 18UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is La Teste-de-Buch?

La Teste-de-Buch sits at 44.6°N, 1.1°W, 5 m above sea level, in France. The nearest listed city is Gujan-Mestras, 6.0 km away.

Topography around La Teste-de-Buch

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of La Teste-de-Buch.

Within 3 km, the terrain around La Teste-de-Buch has only modest variations in elevation — a maximum elevation change of 70 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, only modest variations in elevation — a maximum elevation change of 139 m.

The land around La Teste-de-Buch is covered by trees (43%) and artificial surfaces (34%) within 3 km, water (41%) and trees (37%) within 16 km, and trees (44%) and water (28%) within 80 km.

3 km
70 m
16 km
96 m
80 km
139 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Gujan-Mestras 6.0 km · Cestas 39 km · Saint-Médard-en-Jalles 45 km · Gradignan 45 km · Pessac 45 km · Mérignac 46 km · Eysines 48 km · Talence 48 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 La Teste-de-Buch (44.6328°, -1.1451°, elevation 5 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).