Carcassonne weather in September

In September, Carcassonne sees average daytime highs of 23°C and overnight lows near 13°C, with 53 mm of rain across 7.7 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels dry.

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

Daytime high
23°
4th warmest
Overnight low
13°
9th coldest
Rainfall
53 mm
7.7 wet days
Daylight
12 h 18 min
6:36 AM – 6:54 PM
Cloud cover
51%
3rd clearest
Wind
12 km/h
11th windiest
Solar energy
4.26 kWh/m²
Travel score
7.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 21°C by the end.

A typical September day in Carcassonne reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52514
62414
72414
82414
92414
102414
112414
122414
132314
142313
152313
162313
172313
182313
192213
202213
212213
222213
232212
242212
252212
262112
272112
282112
292112
302112

How September really feels in Carcassonne

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Carcassonne weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8111.72.29.21.6
Feb10° / 6410.32.110.22.1
Mar13° / 6910.41.211.63.8
Apr16° / 8211.80.213.24.7
May20° / 11°7811.30.114.46.0
Jun24° / 14°537.6015.17.2
Jul26° / 16°377014.97.3
Aug27° / 16°417.5013.87.2
Sep23° / 13°537.7012.37.2
Oct18° / 10°679.4010.85.9
Nov13° / 8311.10.59.53.3
Dec10° / 7711.11.18.92.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25941
35842
45941
55941
65941
75941
85842
95842
105743
115644
125644
135644
145545
155446
165446
175347
185347
195248
205248
215248
225149
235149
245149
255050
265050
275050
285050
294951
304951

Chance of precipitation in September

Any precipitation

Carcassonne gets around 53 mm of rain over 7.7 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 27% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
123
223
323
423
523
623
724
824
924
1025
1125
1226
1326
1426
1527
1627
1728
1828
1928
2028
2128
2228
2329
2429
2529
2629
2730
2830
2931
3031

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 55% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14327228
24427217
34628206
44728206
54828195
64828195
74928184
85028184
95029174
105129173
115129173
125328163
135328163
145328163
155428153
165527153
175627152
185826142
195925142
205925142
216024142
226124132
236223132
246323131
256422131
266422131
276422131
286521131
296521131
306621121

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 6:19 AM to 6:52 AM, and sunset from 7:21 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:197:21
213.06:207:20
312.96:217:18
412.96:237:16
512.86:247:14
612.86:257:12
712.76:267:10
812.76:277:09
912.66:287:07
1012.66:297:05
1112.56:317:03
1212.56:327:01
1312.46:336:59
1412.46:346:57
1512.36:356:56
1612.36:366:54
1712.26:376:52
1812.26:386:50
1912.16:406:48
2012.16:416:46
2112.06:426:44
2212.06:436:42
2311.96:446:40
2411.96:456:39
2511.86:476:37
2611.86:486:35
2711.76:496:33
2811.76:506:31
2911.66:516:29
3011.66:526:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.26 kWh/m².

For context, solar energy here swings from a low near 1.34 kWh/m² to a high of 6.31 kWh/m² in July across the year — September's 4.26 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Carcassonne?

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

7.2
Sightseeing
2nd-best month of the year
5.5
Beach & pool
4th-best month of the year

September is one of the better times to visit Carcassonne for general sightseeing.

What to pack for Carcassonne in September

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

In September, Carcassonne sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Carcassonne 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 64 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 Jun 30 to Sep 19 — about 2.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug22Refreshing
Sep20Refreshing
Oct18Cool
Nov16Cool
Dec14Bracing

UV index in Carcassonne 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 Carcassonne peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highHighModerateLowJul 16UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Carcassonne in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Carcassonne is worst in March — around 15 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2015 µg/m³Jul 2110 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar15Moderate
Apr15Moderate
May12Good
Jun12Good
Jul10Good
Aug10Good
Sep10Good
Oct11Good
Nov11Good
Dec13Moderate
Location & terrain

Where is Carcassonne?

Carcassonne sits at 43.2°N, 2.3°E, 113 m above sea level, in France. The nearest listed city is Castres, 44 km away.

Topography around Carcassonne

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

Within 3 km, the terrain around Carcassonne has only modest variations in elevation — a maximum elevation change of 130 m around an average of 119 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 579 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,862 m.

The land around Carcassonne is covered by artificial surfaces (35%) and trees (25%) within 3 km, trees (43%) within 16 km, and trees (49%) and cropland (21%) within 80 km.

3 km
130 m
16 km
579 m
80 km
2,862 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Castres 44 km · Narbonne 53 km · Pamiers 61 km · Béziers 71 km · Perpignan 73 km · Albi 81 km · Balma 81 km · Toulouse 85 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 Carcassonne (43.2165°, 2.3486°, elevation 113 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).