Le Havre weather in September

In September, Le Havre sees average daytime highs of 18°C and overnight lows near 14°C, with 78 mm of rain across 11.7 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 17°C by the end. The sky is clear or mostly clear about 23% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Le Havre's 4th-clearest and 7th-windiest month. For the whole year in context, see Le Havre's year-round climate.

Daytime high
18°
3rd warmest
Overnight low
14°
10th coldest
Rainfall
78 mm
11.7 wet days
Daylight
12 h 24 min
6:43 AM – 7:05 PM
Cloud cover
62%
4th clearest
Wind
18 km/h
7th windiest
Solar energy
3.56 kWh/m²
Travel score
5.6
out of 10

Le Havre is commune in Seine-Maritime, France.

Air quality
Moderate
PM2.5 10.4 µg/m³ · 2019
Density
3,961/km²
people per km²

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 19°C in the first days to 17°C by the end.

A typical September day in Le Havre reaches about 18°C in the afternoon and slips back to 14°C overnight — a 4°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)
11915
21915
31915
41915
51915
61915
71915
81915
91915
101914
111914
121914
131914
141914
151914
161814
171814
181814
191814
201814
211814
221814
231813
241813
251813
261813
271813
281713
291713
301713

Le Havre 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 daysSnow daysDaylight (hours)Travel score
Jan / 8715.10.58.41.2
Feb / 7013.10.89.81.2
Mar10° / 6612.20.311.52.1
Apr12° / 5911.3013.43.1
May15° / 11°5910.9015.14.3
Jun18° / 13°6010.70165.5
Jul20° / 15°6111015.66.2
Aug20° / 16°7311.8014.26.1
Sep18° / 14°7811.7012.45.6
Oct15° / 11°10414.9010.54.1
Nov11° / 11116.30.18.92.4
Dec / 12116.60.481.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64555
74456
84456
94456
104456
114357
124357
134357
144258
154357
164357
174357
184258
194258
204357
214357
224258
234159
244159
254060
263961
273961
283862
293763
303565

Chance of precipitation in September

Any precipitation

Le Havre gets around 78 mm of rain over 11.7 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 40% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
136
236
336
436
536
637
737
838
938
1039
1139
1239
1339
1439
1540
1640
1740
1840
1940
2040
2141
2241
2342
2442
2543
2644
2745
2846
2947
3048

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 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1434314
2444214
3454113
4474013
5483913
6503813
7513712
8523612
9533512
10543412
11563311
12563311
13583210
1459329
1560319
1661318
1762317
1863307
1963316
2063316
2164315
2264324
2364324
2465323
2564333
2664333
2766322
2866322
2966322
3067312

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 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 18 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 108 minutes over September. Sunrise moves from 6:20 AM to 7:04 AM, and sunset from 7:38 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:207:38
213.26:227:36
313.26:237:34
413.16:257:32
513.06:267:29
613.06:287:27
712.96:297:25
812.96:317:23
912.86:327:20
1012.76:347:18
1112.76:357:16
1212.66:377:14
1312.66:397:12
1412.56:407:09
1512.46:427:07
1612.46:437:05
1712.36:457:02
1812.26:467:00
1912.26:486:58
2012.16:496:56
2112.06:516:53
2212.06:526:51
2311.96:546:49
2411.96:556:47
2511.86:576:44
2611.76:586:42
2711.77:006:40
2811.67:016:38
2911.57:036:36
3011.57:046:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.56 kWh/m².

For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 5.95 kWh/m² in June across the year — September's 3.56 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.1Bright
44.1Bright
54.0Bright
64.0Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.0Moderate
273.0Moderate
282.9Moderate
292.9Moderate
302.8Moderate
Planning a trip in September

Is September a good time to visit Le Havre?

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

5.6
Sightseeing
3rd-best month of the year
2.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Le Havre for sightseeing.

What to pack for Le Havre in September

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

In September, Le Havre sees daytime highs around 18°C and nights near 14°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Le Havre in September

The nearest coast averages about 18°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 13 km away) is warmest in August at about 19°C and coldest in February near 8°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan8Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May12Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Le Havre in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Le Havre peaks around June 18 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul6High
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Le Havre 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 Le Havre is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Le Havre's WHO annual average of 10.4 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1515 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun12Good
Jul10Good
Aug10Good
Sep10Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Le Havre?

Le Havre sits at 49.5°N, 0.1°E, 5 m above sea level, in France. The nearest listed city is Montivilliers, 8.0 km away.

Topography around Le Havre

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

Within 3 km, the terrain around Le Havre has only modest variations in elevation — a maximum elevation change of 109 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 168 m; within 80 km, significant variations in elevation — a maximum elevation change of 382 m.

The land around Le Havre is covered by artificial surfaces (50%) and water (37%) within 3 km, water (56%) within 16 km, and water (32%) and cropland (31%) within 80 km.

3 km
109 m
16 km
168 m
80 km
382 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Montivilliers 8.0 km · Deauville 15 km · Fécamp 35 km · Lisieux 40 km · Hérouville-Saint-Clair 43 km · Caen 48 km · Bayeux 63 km · Canteleu 67 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 Le Havre (49.4935°, 0.1079°, 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. 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).