Montivilliers weather in September

In September, Montivilliers sees average daytime highs of 19°C and overnight lows near 13°C, with 71 mm of rain across 11.5 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 6th-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 Montivilliers's 4th-clearest and 8th-windiest month. For the whole year in context, see Montivilliers's year-round climate.

Daytime high
19°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
71 mm
11.5 wet days
Daylight
12 h 24 min
6:43 AM – 7:04 PM
Cloud cover
63%
4th clearest
Wind
16 km/h
8th windiest
Solar energy
3.55 kWh/m²
Travel score
5.7
out of 10

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 Montivilliers 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 15°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
41914
51914
61914
71914
81914
91913
101913
111913
121913
131913
141913
151913
161913
171813
181813
191813
201813
211812
221812
231812
241812
251812
261812
271712
281712
291712
301712

How September really feels in Montivilliers

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.

Montivilliers weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8214.20.78.41.0
Feb / 6812.70.99.81.1
Mar10° / 6712.40.511.52.2
Apr13° / 6211.70.113.43.3
May15° / 10°6311.6015.14.5
Jun18° / 13°6311.20165.6
Jul20° / 15°6111.3015.66.2
Aug21° / 15°7211.8014.26.2
Sep19° / 13°7111.5012.45.7
Oct15° / 10°9514.4010.54.1
Nov11° / 10015.50.18.92.3
Dec / 11115.70.781.2

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 17% of September, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34456
44357
54357
64258
74258
84159
94159
104159
114060
124060
133961
143961
154060
164060
174060
184060
193961
203961
214060
224060
234060
243961
253862
263763
273664
283664
293466
303466

Chance of precipitation in September

Any precipitation

Montivilliers gets around 71 mm of rain over 11.5 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 39% and peaks near 46% 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
1038
1139
1239
1339
1439
1539
1639
1739
1839
1939
2039
2139
2240
2340
2441
2542
2643
2744
2845
2945
3046

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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14840121
24939111
35138110
45337100
55436100
65436100
75535100
85634100
95733100
10593290
11603190
12603190
13623080
14632980
15642970
16652870
17662860
18672760
19682750
20682750
21692740
22692830
23692830
24692830
25692920
26692920
27692920
28712810
29712810
30722710

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light 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
313.26:237:33
413.16:257:31
513.16:267:29
613.06:287:27
712.96:297:25
812.96:317:22
912.86:327:20
1012.76:347:18
1112.76:357:16
1212.66:377:13
1312.66:387:11
1412.56:407:09
1512.46:417:07
1612.46:437:04
1712.36:447:02
1812.26:467:00
1912.26:476:58
2012.16:496:55
2112.06:506:53
2212.06:526:51
2311.96:536:49
2411.96:556:46
2511.86:566:44
2611.76:586:42
2711.77:006:40
2811.67:016:37
2911.57:036:35
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 3.55 kWh/m².

For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 5.93 kWh/m² in June across the year — September's 3.55 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.1Bright
34.1Bright
44.1Bright
54.0Bright
64.0Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.4Moderate
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 Montivilliers?

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

5.7
Sightseeing
3rd-best month of the year
2.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Montivilliers for sightseeing.

What to pack for Montivilliers in September

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

In September, Montivilliers sees daytime highs around 19°C and nights near 13°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Montivilliers 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 offshore 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
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May12Bracing
Jun15Bracing
Jul17Cool
Aug19Cool
Sep18Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Montivilliers 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 Montivilliers 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 Montivilliers 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 Montivilliers is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1515 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun12Moderate
Jul10Good
Aug11Good
Sep10Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Montivilliers?

Montivilliers sits at 49.5°N, 0.2°E, 14 m above sea level, in France. The nearest listed city is Le Havre, 8.0 km away.

Topography around Montivilliers

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

Within 3 km, the terrain around Montivilliers has only modest variations in elevation — a maximum elevation change of 103 m around an average of 64 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 148 m; within 80 km, significant variations in elevation — a maximum elevation change of 335 m.

The land around Montivilliers is covered by cropland (37%), trees (30%) and grassland (20%) within 3 km, water (37%) and cropland (26%) within 16 km, and water (33%) and cropland (31%) within 80 km.

3 km
103 m
16 km
148 m
80 km
335 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Le Havre 8.0 km · Deauville 23 km · Fécamp 27 km · Lisieux 44 km · Hérouville-Saint-Clair 52 km · Caen 56 km · Canteleu 62 km · Le Grand-Quevilly 64 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 Montivilliers (49.5452°, 0.1877°, elevation 14 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).