Aachen weather in August

In August, Aachen sees average daytime highs of 22°C and overnight lows near 14°C, with 79 mm of rain across 12.9 wet days and about 14.3 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 12 min at the start of August to 13 h 24 min by month's end. Set against the rest of the year, August is Aachen's 1st-clearest and 12th-windiest month. For the whole year in context, see Aachen's year-round climate.

Daytime high
22°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
79 mm
12.9 wet days
Daylight
14 h 18 min
5:29 AM – 7:50 PM
Cloud cover
64%
1st clearest
Wind
12 km/h
12th windiest
Solar energy
4.43 kWh/m²
Travel score
6.1
out of 10
Air quality
Good
PM10 17.1 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical August day in Aachen reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 28°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72314
82314
92314
102314
112314
122214
132214
142214
152214
162214
172214
182214
192213
202213
212213
222113
232113
242113
252113
262113
272113
282112
292012
302012
312012

How August really feels in Aachen

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Aachen weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7413.82.98.20.0
Feb / 6812.54.29.70.3
Mar / 7013.71.911.51.8
Apr13° / 5511.60.213.53.6
May17° / 6612.9015.25.1
Jun20° / 12°7613.1016.25.7
Jul22° / 14°8313.8015.86.1
Aug22° / 14°7912.9014.36.1
Sep18° / 11°6610.9012.45.6
Oct14° / 6511.9010.43.7
Nov / 6913.20.98.71.5
Dec / 8514.63.67.80.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34258
44159
54159
64159
74060
84060
93961
103961
113763
123763
133664
143763
153763
163664
173664
183664
193664
203664
213565
223664
233664
243664
253664
263664
273664
283664
293664
303664
313664

Chance of precipitation in August

Any precipitation

Aachen gets around 79 mm of rain over 12.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
341
441
541
641
741
841
942
1042
1142
1243
1343
1443
1543
1644
1744
1844
1943
2043
2143
2243
2342
2442
2542
2641
2741
2840
2939
3039
3138

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14143150
24144140
34145140
44245130
54245130
64245120
74345120
84345120
94445120
104444120
114543120
124543120
134642120
144741130
154740130
164839130
174938130
185037130
195136130
205235130
215334130
225433130
235432131
245631121
255730121
265929111
276128101
286227101
29632791
30652681
31652681

Wind in August

Winds average 12 km/h in August, the calmest month.

Across August, 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.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 12 min at the start of August to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over August. Sunrise moves from 5:07 AM to 5:53 AM, and sunset from 8:17 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.25:078:17
215.15:088:15
315.15:098:14
415.05:118:12
515.05:128:10
614.95:148:09
714.95:158:07
814.85:178:05
914.75:198:03
1014.75:208:02
1114.65:228:00
1214.65:237:58
1314.55:257:56
1414.55:267:54
1514.45:287:52
1614.35:297:50
1714.35:317:48
1814.25:337:46
1914.25:347:44
2014.15:367:42
2114.05:377:40
2214.05:397:38
2313.95:407:36
2413.95:427:34
2513.85:447:31
2613.75:457:29
2713.75:477:27
2813.65:487:25
2913.55:507:23
3013.55:527:21
3113.45:537:18

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.43 kWh/m².

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.3 kWh/m² in June across the year — August's 4.43 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.0Bright
264.0Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
313.7Moderate
Planning a trip in August

Is August a good time to visit Aachen?

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

6.1
Sightseeing
1st-best month of the year
4.2
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Aachen for sightseeing.

What to pack for Aachen in August

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

In August, Aachen sees daytime highs around 22°C and nights near 14°C. Worth packing: rain gear. About 13 days see rain.

rain gear

UV index in Aachen in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aachen peaks around July 15 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 15UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Aachen in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Aachen is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1315 µg/m³Dec 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar15Moderate
Apr15Moderate
May14Moderate
Jun13Moderate
Jul12Good
Aug13Moderate
Sep12Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Aachen?

Aachen sits at 50.8°N, 6.1°E, 266 m above sea level, in Germany. The nearest listed city is Würselen, 6.0 km away.

Topography around Aachen

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

Within 3 km, the terrain around Aachen has only modest variations in elevation — a maximum elevation change of 138 m around an average of 189 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 385 m; within 80 km, large variations in elevation — a maximum elevation change of 1,018 m.

The land around Aachen is covered by artificial surfaces (45%) and trees (41%) within 3 km, trees (37%) and grassland (31%) within 16 km, and trees (40%), cropland (26%) and grassland (24%) within 80 km.

3 km
138 m
16 km
385 m
80 km
1,018 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Würselen 6.0 km · Kerkrade 10 km · Stolberg 10 km · Herzogenrath 10 km · Alsdorf 12 km · Heerlen 14 km · Eschweiler 14 km · Übach-Palenberg 16 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 Aachen (50.7766°, 6.0834°, elevation 266 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).