Dreux weather in September

In September, Dreux sees average daytime highs of 20°C and overnight lows near 11°C, with 43 mm of rain across 8.2 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 18°C by the end. The sky is clear or mostly clear about 22% 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 Dreux's 3rd-clearest and 9th-windiest month. For the whole year in context, see Dreux's year-round climate.

Daytime high
20°
4th warmest
Overnight low
11°
9th coldest
Rainfall
43 mm
8.2 wet days
Daylight
12 h 24 min
6:38 AM – 6:59 PM
Cloud cover
64%
3rd clearest
Wind
13 km/h
9th windiest
Solar energy
3.5 kWh/m²
Travel score
6.5
out of 10
Air quality
Excellent
PM10 12.1 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 18°C by the end.

A typical September day in Dreux reaches about 20°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 25°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)
12212
22212
32212
42212
52212
62112
72112
82111
92111
102111
112111
122111
132111
142011
152011
162011
172011
182011
192010
202010
212010
221910
231910
241910
251910
261910
271910
281910
291810
301810

How September really feels in Dreux

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.

Dreux weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 4910.518.50.7
Feb / 419.41.39.81.2
Mar11° / 479.90.511.62.8
Apr14° / 4810.8013.44.1
May18° / 6010.70155.4
Jun21° / 12°549.6015.96.3
Jul24° / 14°488.9015.57.0
Aug24° / 13°508.2014.27.1
Sep20° / 11°438.2012.46.5
Oct16° / 5710.2010.54.6
Nov10° / 5310.80.292.2
Dec / 6112.20.98.10.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% 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 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23961
33961
43961
53862
63961
73961
83862
93862
103763
113763
123862
133961
143961
153961
163961
173961
183961
193961
203862
213763
223763
233763
243664
253664
263466
273367
283268
293169
303070

Chance of precipitation in September

Any precipitation

Dreux gets around 43 mm of rain over 8.2 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 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
324
424
525
625
725
826
926
1026
1126
1226
1326
1426
1526
1626
1727
1827
1927
2027
2128
2228
2329
2430
2530
2631
2732
2833
2933
3034

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1642691
2652681
3662671
4672670
5682660
6682660
7692650
8702550
9702550
10712450
11722440
12732340
13742240
14742240
15762130
16772030
17781930
18781930
19791830
20791830
21801820
22811720
23811720
24801820
25801820
26801820
27801820
28801820
29801820
30811720

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
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light 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 6:16 AM to 6:59 AM, and sunset from 7:32 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:167:32
213.26:187:30
313.16:197:28
413.16:217:26
513.06:227:23
613.06:247:21
712.96:257:19
812.86:277:17
912.86:287:15
1012.76:307:13
1112.76:317:10
1212.66:327:08
1312.56:347:06
1412.56:357:04
1512.46:377:02
1612.46:386:59
1712.36:406:57
1812.26:416:55
1912.26:436:53
2012.16:446:51
2112.06:466:48
2212.06:476:46
2311.96:496:44
2411.96:506:42
2511.86:526:40
2611.76:536:37
2711.76:556:35
2811.66:566:33
2911.66:586:31
3011.56:596:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.5 kWh/m².

For context, solar energy here swings from a low near 0.81 kWh/m² to a high of 5.61 kWh/m² in June across the year — September's 3.5 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Bright
54.0Moderate
63.9Moderate
73.9Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.0Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
Planning a trip in September

Is September a good time to visit Dreux?

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

6.5
Sightseeing
3rd-best month of the year
3.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Dreux for sightseeing.

What to pack for Dreux in September

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

In September, Dreux sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 8 days see rain.

rain gear

UV index in Dreux 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 Dreux peaks around August 11 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 11UV 7Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Dreux 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 Dreux is worst in April — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateApr 1018 µg/m³Jul 2012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar18Moderate
Apr18Moderate
May15Moderate
Jun14Moderate
Jul12Good
Aug13Moderate
Sep13Moderate
Oct13Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Dreux?

Dreux sits at 48.7°N, 1.4°E, 96 m above sea level, in France. The nearest listed city is Chartres, 33 km away.

Topography around Dreux

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

Within 3 km, the terrain around Dreux has only modest variations in elevation — a maximum elevation change of 76 m around an average of 122 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 145 m; within 80 km, significant variations in elevation — a maximum elevation change of 347 m.

The land around Dreux is covered by artificial surfaces (35%), trees (25%) and cropland (25%) within 3 km, cropland (62%) and trees (26%) within 16 km, and cropland (56%) and trees (27%) within 80 km.

3 km
76 m
16 km
145 m
80 km
347 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Chartres 33 km · Lucé 34 km · Rambouillet 36 km · Évreux 36 km · Mantes-la-Ville 36 km · Mantes-la-Jolie 38 km · Limay 40 km · Vernon 40 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 Dreux (48.7365°, 1.3657°, elevation 96 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).