Heiligenhaus weather in September

In September, Heiligenhaus sees average daytime highs of 19°C and overnight lows near 11°C, with 80 mm of rain across 12.2 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 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 19% 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 24 min by month's end. Set against the rest of the year, September is Heiligenhaus's 4th-clearest and 8th-windiest month. For the whole year in context, see Heiligenhaus's year-round climate.

Daytime high
19°
4th warmest
Overnight low
11°
9th coldest
Rainfall
80 mm
12.2 wet days
Daylight
12 h 24 min
6:15 AM – 6:38 PM
Cloud cover
66%
4th clearest
Wind
12 km/h
8th windiest
Solar energy
3.03 kWh/m²
Travel score
5.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 17°C by the end.

A typical September day in Heiligenhaus 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 14°C and 24°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)
12012
22012
32012
42012
52012
62012
72012
82012
91912
101912
111911
121911
131911
141911
151911
161911
171811
181811
191811
201811
211810
221810
231810
241710
251710
261710
271710
281710
291710
301610

How September really feels in Heiligenhaus

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.

Heiligenhaus 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 / 9814.93.38.20.0
Feb / 8013.33.79.60.3
Mar10° / 7913.81.811.51.9
Apr14° / 6011.60.213.53.9
May18° / 7212.6015.35.3
Jun21° / 12°8312.9016.35.8
Jul23° / 14°9814.5015.96.1
Aug22° / 14°9413.7014.46.1
Sep19° / 11°8012.2012.45.5
Oct14° / 8812.9010.43.6
Nov / 8814.30.98.61.4
Dec / 10616.13.57.70.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 (%)
13466
23565
33565
43466
53565
63565
73565
83565
93565
103565
113565
123664
133664
143763
153763
163763
173862
183862
193862
203862
213862
223763
233763
243763
253664
263565
273367
283367
293169
303070

Chance of precipitation in September

Any precipitation

Heiligenhaus gets around 80 mm of rain over 12.2 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 41% and peaks near 45% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
140
240
340
440
540
640
741
841
941
1041
1141
1241
1341
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2442
2542
2643
2744
2844
2945
3045

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 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1632791
2642781
3642781
4672670
5672670
6682660
7692560
8692560
9702460
10722350
11732250
12742150
13742150
14762040
15771940
16781840
17801730
18801730
19821620
20821620
21821620
22831610
23831610
24831610
25831610
26831610
27831610
28831610
29841600
30851500

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
312calm
412calm
512calm
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
2512light breeze
2612light breeze
2712light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 5:50 AM to 6:38 AM, and sunset from 7:13 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:507:13
213.35:527:11
313.35:547:09
413.25:557:06
513.15:577:04
613.15:597:02
713.06:006:59
812.96:026:57
912.96:036:55
1012.86:056:52
1112.76:076:50
1212.76:086:48
1312.66:106:45
1412.56:126:43
1512.56:136:40
1612.46:156:38
1712.36:166:36
1812.36:186:33
1912.26:206:31
2012.16:216:28
2112.16:236:26
2212.06:256:24
2311.96:266:21
2411.86:286:19
2511.86:306:17
2611.76:316:14
2711.66:336:12
2811.66:356:10
2911.56:366:07
3011.46:386:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.03 kWh/m².

For context, solar energy here swings from a low near 0.6 kWh/m² to a high of 5.24 kWh/m² in June across the year — September's 3.03 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.4Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.1Moderate
143.1Moderate
153.1Moderate
163.0Moderate
173.0Moderate
183.0Moderate
192.9Moderate
202.9Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.6Moderate
262.5Moderate
272.5Moderate
282.4Moderate
292.4Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Heiligenhaus?

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

5.5
Sightseeing
4th-best month of the year
2.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Heiligenhaus for sightseeing.

What to pack for Heiligenhaus in September

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

In September, Heiligenhaus sees daytime highs around 19°C and nights near 11°C. Worth packing: rain gear. About 12 days see rain.

rain gear

UV index in Heiligenhaus 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 Heiligenhaus 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 Heiligenhaus 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 Heiligenhaus 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 Heiligenhaus?

Heiligenhaus sits at 51.3°N, 7.0°E, 180 m above sea level, in Germany. The nearest listed city is Velbert, 5.0 km away.

Topography around Heiligenhaus

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

Within 3 km, the terrain around Heiligenhaus has only modest variations in elevation — a maximum elevation change of 188 m around an average of 154 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 347 m; within 80 km, large variations in elevation — a maximum elevation change of 958 m.

The land around Heiligenhaus is covered by trees (40%) and cropland (29%) within 3 km, trees (53%) within 16 km, and trees (41%) and cropland (30%) within 80 km.

3 km
188 m
16 km
347 m
80 km
958 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Velbert 5.0 km · Wülfrath 7.0 km · Mettmann 8.0 km · Ratingen 9.0 km · Erkrath 12 km · Mülheim 13 km · Wuppertal 15 km · Essen 15 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 Heiligenhaus (51.3266°, 6.9711°, elevation 180 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).