Douai weather in September

In September, Douai sees average daytime highs of 19°C and overnight lows near 11°C, with 48 mm of rain across 9.4 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 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 18% 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 Douai's 3rd-clearest and 9th-windiest month. For the whole year in context, see Douai's year-round climate.

Daytime high
19°
4th warmest
Overnight low
11°
9th coldest
Rainfall
48 mm
9.4 wet days
Daylight
12 h 24 min
6:31 AM – 6:53 PM
Cloud cover
66%
3rd clearest
Wind
13 km/h
9th windiest
Solar energy
3.24 kWh/m²
Travel score
6.1
out of 10
Air quality
Moderate
PM2.5 12.4 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 21°C in the first days to 18°C by the end.

A typical September day in Douai reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12112
22112
32112
42112
52112
62012
72012
82012
92012
102012
112012
122012
132011
142011
151911
161911
171911
181911
191911
201911
211911
221911
231911
241811
251810
261810
271810
281810
291810
301710

How September really feels in Douai

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.

Douai 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 / 5711.318.30.6
Feb / 5010.31.39.71.0
Mar11° / 5111.10.711.52.5
Apr14° / 5011.20.113.54.0
May18° / 6412.4015.25.2
Jun20° / 12°6110.7016.16.0
Jul23° / 14°6010.8015.76.6
Aug23° / 14°6811.1014.36.5
Sep19° / 11°489.4012.46.1
Oct15° / 6011.1010.54.3
Nov10° / 6011.90.38.82.1
Dec / 7012.81.17.90.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33466
43466
53466
63466
73466
83466
93466
103367
113367
123466
133466
143466
153565
163565
173565
183565
193664
203664
213565
223565
233565
243466
253466
263466
273367
283169
293169
303070

Chance of precipitation in September

Any precipitation

Douai gets around 48 mm of rain over 9.4 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 32% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
131
230
330
430
530
630
730
831
931
1031
1131
1231
1331
1431
1531
1631
1731
1831
1932
2032
2132
2232
2333
2433
2534
2634
2735
2836
2936
3037

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 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1593191
2603190
3623080
4623080
5632980
6642970
7652870
8652870
9662770
10672760
11682660
12692560
13712450
14722350
15722350
16742240
17752140
18762130
19762130
20772030
21782020
22772120
23772120
24782110
25782110
26782110
27782110
28782110
29792010
30802000

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 14 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
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 6:07 AM to 6:53 AM, and sunset from 7:27 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:077:27
213.36:097:25
313.26:107:23
413.16:127:21
513.16:147:18
613.06:157:16
713.06:177:14
812.96:187:12
912.86:207:09
1012.86:217:07
1112.76:237:05
1212.66:257:02
1312.66:267:00
1412.56:286:58
1512.46:296:56
1612.46:316:53
1712.36:326:51
1812.26:346:49
1912.26:366:46
2012.16:376:44
2112.06:396:42
2212.06:406:39
2311.96:426:37
2411.96:436:35
2511.86:456:32
2611.76:476:30
2711.76:486:28
2811.66:506:25
2911.56:516:23
3011.56:536:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.24 kWh/m².

For context, solar energy here swings from a low near 0.69 kWh/m² to a high of 5.44 kWh/m² in June across the year — September's 3.24 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.4Moderate
123.4Moderate
133.4Moderate
143.3Moderate
153.3Moderate
163.3Moderate
173.2Moderate
183.2Moderate
193.1Moderate
203.1Moderate
213.0Moderate
223.0Moderate
232.9Moderate
242.9Moderate
252.8Moderate
262.8Moderate
272.7Moderate
282.7Moderate
292.6Moderate
302.6Moderate
Planning a trip in September

Is September a good time to visit Douai?

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

6.1
Sightseeing
3rd-best month of the year
2.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Douai for sightseeing.

What to pack for Douai in September

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

In September, Douai sees daytime highs around 19°C and nights near 11°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Douai 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 Douai 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 14UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

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

Seasonal pattern from CAMS reanalysis, scaled to Douai's WHO annual average of 12.4 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodApr 1116 µg/m³Nov 2010 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar15Moderate
Apr16Moderate
May14Moderate
Jun13Moderate
Jul11Good
Aug12Moderate
Sep12Good
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Douai?

Douai sits at 50.4°N, 3.1°E, 29 m above sea level, in France. The nearest listed city is Sin-le-Noble, 4.0 km away.

Topography around Douai

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

Within 3 km, the terrain around Douai has only modest variations in elevation — a maximum elevation change of 35 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 99 m; within 80 km, significant variations in elevation — a maximum elevation change of 374 m.

The land around Douai is covered by artificial surfaces (42%) and trees (29%) within 3 km, cropland (51%) and trees (21%) within 16 km, and cropland (61%) within 80 km.

3 km
35 m
16 km
99 m
80 km
374 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sin-le-Noble 4.0 km · Hénin-Beaumont 9.0 km · Carvin 16 km · Avion 18 km · Lens 19 km · Liévin 22 km · Arras 23 km · Denain 23 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 Douai (50.3707°, 3.0792°, elevation 29 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).