Coulommiers weather in September

In September, Coulommiers sees average daytime highs of 21°C and overnight lows near 11°C, with 52 mm of rain across 8.8 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°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 Coulommiers's 3rd-clearest and 9th-windiest month. For the whole year in context, see Coulommiers's year-round climate.

Daytime high
21°
4th warmest
Overnight low
11°
9th coldest
Rainfall
52 mm
8.8 wet days
Daylight
12 h 24 min
6:31 AM – 6:53 PM
Cloud cover
63%
3rd clearest
Wind
12 km/h
9th windiest
Solar energy
3.47 kWh/m²
Travel score
6.4
out of 10
Air quality
Good
PM10 22 µg/m³ · 2019

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 22°C in the first days to 19°C by the end.

A typical September day in Coulommiers reaches about 21°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°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)
12313
22213
32213
42212
52212
62212
72212
82212
92212
102112
112112
122112
132111
142111
152111
162111
172011
182011
192011
202011
212011
222011
232010
241910
251910
261910
271910
281910
291910
301810

How September really feels in Coulommiers

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.

Coulommiers weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 621218.50.6
Feb / 5610.21.49.81.1
Mar12° / 5711.50.611.62.9
Apr15° / 5410.9013.44.4
May19° / 6511.50155.6
Jun22° / 12°5510.6015.96.4
Jul25° / 15°559.6015.56.9
Aug24° / 14°609.6014.26.9
Sep21° / 11°528.8012.46.4
Oct16° / 6811.4010.54.6
Nov10° / 64120.48.92.1
Dec / 8213.31.18.10.8

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 15% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
24060
34159
44060
54060
64060
74060
84060
94060
104060
114060
123961
133961
144159
154060
164060
174060
183961
193961
203862
213763
223763
233763
243763
253664
263565
273466
283367
293268
303169

Chance of precipitation in September

Any precipitation

Coulommiers gets around 52 mm of rain over 8.8 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% 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 (%)
127
227
327
427
527
627
728
828
928
1029
1129
1229
1329
1429
1530
1630
1730
1830
1930
2030
2131
2231
2331
2431
2532
2632
2733
2834
2935
3035

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1622711
2622711
3632710
465269
565269
666268
766268
867267
967267
1069256
1169256
1270246
1371245
1472235
1573234
1674224
1774224
1876213
1976213
2076213
2178202
2278202
2378202
2478202
2578202
2678202
2778202
2878202
2978202
3079192

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
112calm
212calm
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light 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 6:09 AM to 6:52 AM, and sunset from 7:25 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:097:25
213.26:117:23
313.16:127:21
413.16:147:19
513.06:157:17
613.06:177:15
712.96:187:12
812.86:207:10
912.86:217:08
1012.76:237:06
1112.76:247:04
1212.66:267:01
1312.56:276:59
1412.56:286:57
1512.46:306:55
1612.46:316:53
1712.36:336:50
1812.26:346:48
1912.26:366:46
2012.16:376:44
2112.06:396:42
2212.06:406:39
2311.96:426:37
2411.96:436:35
2511.86:456:33
2611.76:466:30
2711.76:486:28
2811.66:496:26
2911.66:516:24
3011.56:526:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.47 kWh/m².

For context, solar energy here swings from a low near 0.77 kWh/m² to a high of 5.63 kWh/m² in June across the year — September's 3.47 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.2Moderate
223.2Moderate
233.1Moderate
243.1Moderate
253.0Moderate
263.0Moderate
272.9Moderate
282.8Moderate
292.8Moderate
302.7Moderate
Planning a trip in September

Is September a good time to visit Coulommiers?

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

6.4
Sightseeing
3rd-best month of the year
3.7
Beach & pool
4th-best month of the year

September is a reasonable time to visit Coulommiers for sightseeing.

What to pack for Coulommiers in September

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

In September, Coulommiers sees daytime highs around 21°C and nights near 11°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Coulommiers 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 Coulommiers peaks around July 14 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 14UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Coulommiers 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 Coulommiers is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2316 µg/m³Nov 1711 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr16Moderate
May14Moderate
Jun14Moderate
Jul11Good
Aug12Good
Sep12Good
Oct11Good
Nov11Good
Dec11Good
Location & terrain

Where is Coulommiers?

Coulommiers sits at 48.8°N, 3.1°E, 79 m above sea level, in France. The nearest listed city is Meaux, 22 km away.

Topography around Coulommiers

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

Within 3 km, the terrain around Coulommiers has only modest variations in elevation — a maximum elevation change of 96 m around an average of 113 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 157 m; within 80 km, significant variations in elevation — a maximum elevation change of 285 m.

The land around Coulommiers is covered by cropland (42%) and trees (35%) within 3 km, cropland (61%) and trees (30%) within 16 km, and cropland (53%) and trees (34%) within 80 km.

3 km
96 m
16 km
157 m
80 km
285 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Meaux 22 km · Lagny-sur-Marne 28 km · Ozoir-la-Ferrière 31 km · Torcy 32 km · Roissy-en-Brie 32 km · Marne La Vallée 32 km · Lognes 33 km · Noisiel 34 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 Coulommiers (48.8145°, 3.085°, elevation 79 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. 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).