Rochefort weather in September

In September, Rochefort sees average daytime highs of 23°C and overnight lows near 13°C, with 51 mm of rain across 7.8 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 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Rochefort's 3rd-clearest and 10th-windiest month. For the whole year in context, see Rochefort's year-round climate.

Daytime high
23°
4th warmest
Overnight low
13°
9th coldest
Rainfall
51 mm
7.8 wet days
Daylight
12 h 18 min
6:49 AM – 7:08 PM
Cloud cover
54%
3rd clearest
Wind
13 km/h
10th windiest
Solar energy
4.12 kWh/m²
Travel score
7.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 21°C by the end.

A typical September day in Rochefort reaches about 23°C in the afternoon and slips back to 13°C overnight — a 9°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 3°C cooler than August and about 4°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12515
22415
32415
42415
52414
62414
72414
82414
92414
102414
112314
122314
132314
142314
152313
162313
172313
182213
192213
202213
212213
222213
232213
242213
252113
262113
272112
282112
292112
302112

How September really feels in Rochefort

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.

Rochefort 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 daysDaylight (hours)Travel score
Jan10° / 7211.58.92.0
Feb11° / 539.4102.6
Mar14° / 5510.511.64.0
Apr16° / 5910.413.35.1
May20° / 11°6311.614.76.0
Jun23° / 14°508.315.57.0
Jul25° / 16°376.815.27.4
Aug26° / 16°427.1147.4
Sep23° / 13°517.812.37.1
Oct18° / 11°7711.510.75.6
Nov13° / 8312.29.33.5
Dec10° / 8012.18.52.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35743
45644
55644
65644
75545
85545
95545
105446
115446
125347
135248
145149
155149
165149
175050
185050
195050
205050
214951
224951
234951
244852
254852
264753
274654
284555
294555
304456

Chance of precipitation in September

Any precipitation

Rochefort gets around 51 mm of rain over 7.8 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 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
322
422
522
622
723
823
924
1024
1125
1225
1326
1426
1527
1627
1728
1828
1928
2028
2129
2229
2329
2430
2530
2631
2731
2832
2932
3032

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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14134213
24335203
34435183
44535172
54635162
64736152
74836152
84836141
94936141
105036131
115036131
125135131
135135131
145234131
155334130
165433130
175433130
185533120
195632120
205632120
215632120
225732110
235732110
245732110
255732110
265831110
275831110
285831110
295831110
305930110

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 13 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
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light 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 h 06 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 96 minutes over September. Sunrise moves from 6:29 AM to 7:07 AM, and sunset from 7:38 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:297:38
213.16:317:36
313.06:327:34
413.06:337:32
512.96:347:30
612.96:367:28
712.86:377:26
812.86:387:24
912.76:407:22
1012.76:417:20
1112.66:427:18
1212.56:437:16
1312.56:457:14
1412.46:467:12
1512.46:477:10
1612.36:497:08
1712.36:507:06
1812.26:517:04
1912.26:527:02
2012.16:547:00
2112.06:556:58
2212.06:566:56
2311.96:586:54
2411.96:596:52
2511.87:006:49
2611.87:026:47
2711.77:036:45
2811.77:046:43
2911.67:066:41
3011.57:076:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 1.11 kWh/m² to a high of 6.18 kWh/m² in June across the year — September's 4.12 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Moderate
193.9Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Rochefort?

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

7.1
Sightseeing
3rd-best month of the year
5.3
Beach & pool
4th-best month of the year

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

What to pack for Rochefort in September

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

In September, Rochefort 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 Rochefort in September

The nearest coast averages about 19°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 32 km away) is warmest in August at about 20°C and coldest in February near 10°C.

It's comfortable for a long swim from Aug 1 to Aug 23 — about 0.8 months when the water holds above 20°C.

10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar11Bracing
Apr12Bracing
May15Bracing
Jun18Cool
Jul20Cool
Aug20Refreshing
Sep19Cool
Oct17Cool
Nov15Bracing
Dec12Bracing

UV index in Rochefort 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 Rochefort peaks around July 19 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 19UV 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 Rochefort?

Rochefort sits at 45.9°N, 1.0°W, 15 m above sea level, in France. The nearest listed city is La Rochelle, 28 km away.

Topography around Rochefort

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

Within 3 km, the terrain around Rochefort has only modest variations in elevation — a maximum elevation change of 29 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 68 m; within 80 km, significant variations in elevation — a maximum elevation change of 282 m.

The land around Rochefort is covered by grassland (44%) and artificial surfaces (26%) within 3 km, cropland (36%) and grassland (30%) within 16 km, and cropland (40%) and water (27%) within 80 km.

3 km
29 m
16 km
68 m
80 km
282 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: La Rochelle 28 km · Saintes 34 km · Royan 35 km · Cognac 57 km · Niort 58 km · Fontenay-le-Comte 60 km · Les Sables-d'Olonne 88 km · La Roche-sur-Yon 88 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 Rochefort (45.943°, -0.9677°, elevation 15 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).