Dormagen weather in September

In September, Dormagen sees average daytime highs of 20°C and overnight lows near 11°C, with 61 mm of rain across 10.2 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 8th-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 21% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Dormagen's 4th-clearest and 8th-windiest month. For the whole year in context, see Dormagen's year-round climate.

Daytime high
20°
4th warmest
Overnight low
11°
9th coldest
Rainfall
61 mm
10.2 wet days
Daylight
12 h 24 min
6:16 AM – 6:38 PM
Cloud cover
65%
4th clearest
Wind
11 km/h
8th windiest
Solar energy
3.1 kWh/m²
Travel score
6.0
out of 10

Dormagen is human settlement in Germany.

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 Dormagen reaches about 20°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 15°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)
12113
22113
32113
42113
52112
62112
72112
82112
92012
102012
112012
122012
132012
142012
152011
162011
171911
181911
191911
201911
211911
221911
231911
241811
251810
261810
271810
281810
291810
301710

How September really feels in Dormagen

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.

Dormagen weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6913.628.20.2
Feb / 5911.82.89.60.7
Mar11° / 5912.80.911.52.3
Apr15° / 459.90.113.54.3
May19° / 10°5511015.35.7
Jun22° / 13°6311.3016.26.2
Jul24° / 15°7012.1015.96.5
Aug23° / 14°6911.2014.46.6
Sep20° / 11°6110.2012.46.0
Oct15° / 6711.6010.44.1
Nov / 6912.70.68.71.8
Dec / 7914.62.57.80.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% 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 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23664
33565
43565
53664
63664
73664
83763
93763
103664
113664
123763
133664
143664
153763
163763
173763
183862
193862
203862
213862
223862
233862
243763
253565
263565
273466
283367
293268
303169

Chance of precipitation in September

Any precipitation

Dormagen gets around 61 mm of rain over 10.2 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 35% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
333
433
533
633
733
834
934
1034
1133
1233
1333
1433
1532
1632
1733
1833
1933
2034
2134
2234
2335
2436
2537
2638
2739
2840
2941
3042

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 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1662491
2672481
3682381
4702370
5702370
6722260
7722260
8722260
9732160
10752050
11752050
12761950
13771850
14781840
15791740
16811630
17811630
18811630
19831520
20831520
21831520
22831520
23841510
24841510
25831610
26831610
27831610
28831610
29841600
30841600

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 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 114 minutes over September. Sunrise moves from 5:51 AM to 6:38 AM, and sunset from 7:14 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:517:14
213.35:537:11
313.25:547:09
413.25:567:07
513.15:587:04
613.05:597:02
713.06:017:00
812.96:036:57
912.86:046:55
1012.86:066:53
1112.76:076:50
1212.66:096:48
1312.66:116:46
1412.56:126:43
1512.46:146:41
1612.46:166:38
1712.36:176:36
1812.26:196:34
1912.26:206:31
2012.16:226:29
2112.16:246:27
2212.06:256:24
2311.96:276:22
2411.96:296:20
2511.86:306:17
2611.76:326:15
2711.76:336:13
2811.66:356:10
2911.56:376:08
3011.56:386:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.1 kWh/m².

For context, solar energy here swings from a low near 0.62 kWh/m² to a high of 5.31 kWh/m² in June across the year — September's 3.1 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.5Moderate
53.5Moderate
63.5Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.3Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.8Moderate
232.8Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.4Moderate
Planning a trip in September

Is September a good time to visit Dormagen?

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

6.0
Sightseeing
4th-best month of the year
2.9
Beach & pool
4th-best month of the year

September is a reasonable time to visit Dormagen for sightseeing.

What to pack for Dormagen in September

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

In September, Dormagen sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Dormagen 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 Dormagen peaks around July 12 at about 6 (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 12UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul6High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Dormagen 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 Dormagen is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1415 µg/m³Dec 109 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun14Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Dormagen?

Dormagen sits at 51.1°N, 6.8°E, 45 m above sea level, in Germany. The nearest listed city is Monheim am Rhein, 4.0 km away.

Topography around Dormagen

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

Within 3 km, the terrain around Dormagen has only modest variations in elevation — a maximum elevation change of 39 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 156 m; within 80 km, large variations in elevation — a maximum elevation change of 1,018 m.

The land around Dormagen is covered by cropland (34%), artificial surfaces (24%) and trees (22%) within 3 km, trees (33%), cropland (29%) and artificial surfaces (23%) within 16 km, and trees (46%) and cropland (23%) within 80 km.

3 km
39 m
16 km
156 m
80 km
1,018 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Monheim am Rhein 4.0 km · Langenfeld 8.0 km · Wersten 10 km · Hilden 11 km · Pulheim 11 km · Opladen 12 km · Leverkusen 13 km · Leichlingen 13 km

Germany travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 80% of US
price level, 2025
GDP per capita
$60,496
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.9
per 100k, 2023
Road deaths
3.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 615
Religion
none 44%Roman Catholic 25%Protestant 23%other 5%

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 Dormagen (51.0968°, 6.8317°, elevation 45 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).