Flensburg weather in August

In August, Flensburg sees average daytime highs of 21°C and overnight lows near 13°C, with 76 mm of rain across 12.8 wet days and about 14.7 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 20% of the time in August, and the air most often feels dry.

Daylight stretches from about 15 h 42 min at the start of August to 13 h 36 min by month's end. Set against the rest of the year, August is Flensburg's 4th-clearest and 12th-windiest month. For the whole year in context, see Flensburg's year-round climate.

Daytime high
21°
2nd warmest
Overnight low
13°
12th coldest
Rainfall
76 mm
12.8 wet days
Daylight
14 h 42 min
5:04 AM – 7:48 PM
Cloud cover
64%
4th clearest
Wind
14 km/h
12th windiest
Solar energy
4.29 kWh/m²
Travel score
6.0
out of 10
Air quality
Moderate
PM2.5 11 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 22°C in the first days to 19°C by the end.

A typical August day in Flensburg reaches about 21°C in the afternoon and slips back to 13°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 26°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)
12214
22214
32214
42214
52214
62214
72214
82214
92214
102114
112114
122114
132114
142114
152113
162113
172113
182113
192113
202113
212113
222013
232013
242013
252013
262013
272012
282012
291912
301912
311912

How August really feels in Flensburg

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.

Flensburg weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6412.72.77.60.0
Feb / -0°4910.43.39.30.0
Mar / 5010.7211.50.8
Apr11° / 439.60.313.72.9
May16° / 5510.6015.84.8
Jun19° / 11°6811.6016.95.7
Jul21° / 13°7412.3016.56.1
Aug21° / 13°7612.8014.76.0
Sep17° / 11°6311012.55.2
Oct12° / 6612.6010.23.1
Nov / 5711.90.68.21.1
Dec / 6312.62.67.10.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64060
74159
84159
94159
104159
114159
124060
134060
144159
154060
163961
174060
183961
193961
203961
213961
223961
233961
243961
253862
263862
273862
283763
293763
303664
313664

Chance of precipitation in August

Any precipitation

Flensburg gets around 76 mm of rain over 12.8 wet days in August, the wettest month. 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 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
242
341
441
541
641
741
841
941
1041
1141
1241
1341
1441
1541
1641
1741
1841
1941
2041
2142
2242
2342
2442
2542
2642
2742
2841
2941
3041
3141

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 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13646172
23646172
33645172
43745171
53745171
63844171
73944171
83943171
94043171
104043170
114142170
124142170
134241170
144241170
154241160
164340160
174340161
184440151
194540151
204639141
214739141
224838131
234937131
245136121
255335111
265435101
27563491
28573391
29593281
30603271
31623161

Wind in August

Winds average 14 km/h in August, the calmest month.

Across August, 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.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 15 h 42 min at the start of August to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 126 minutes over August. Sunrise moves from 4:37 AM to 5:33 AM, and sunset from 8:20 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.74:378:20
215.64:398:18
315.64:418:16
415.54:428:14
515.54:448:12
615.44:468:10
715.34:488:08
815.34:508:06
915.24:518:04
1015.14:538:02
1115.14:557:59
1215.04:577:57
1314.94:597:55
1414.95:017:53
1514.85:037:50
1614.75:047:48
1714.75:067:46
1814.65:087:44
1914.55:107:41
2014.45:127:39
2114.45:147:36
2214.35:167:34
2314.25:187:32
2414.25:207:29
2514.15:227:27
2614.05:237:24
2713.95:257:22
2813.95:277:19
2913.85:297:17
3013.75:317:14
3113.65:337:12

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.29 kWh/m².

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5.55 kWh/m² in June across the year — August's 4.29 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.0Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Flensburg?

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

6.0
Sightseeing
2nd-best month of the year
3.5
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Flensburg for sightseeing.

What to pack for Flensburg in August

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

In August, Flensburg sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Flensburg in August

The nearest coast averages about 19°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 19°C and coldest in February near 2°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar3Bracing
Apr5Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec4Bracing

UV index in Flensburg in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Flensburg peaks around July 17 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 17UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Flensburg?

Flensburg sits at 54.8°N, 9.4°E, 33 m above sea level, in Germany. The nearest listed city is Sønderborg, 26 km away.

HaderslevRendsburg

Topography around Flensburg

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

Within 3 km, the terrain around Flensburg has only modest variations in elevation — a maximum elevation change of 82 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 99 m; within 80 km, only modest variations in elevation — a maximum elevation change of 144 m.

The land around Flensburg is covered by trees (45%) and artificial surfaces (33%) within 3 km, cropland (39%), grassland (25%) and trees (22%) within 16 km, and water (35%), cropland (31%) and grassland (21%) within 80 km.

3 km
82 m
16 km
99 m
80 km
144 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Sønderborg 26 km · Aabenraa 29 km · Schleswig 31 km · Tønder 40 km · Husum 42 km · Eckernförde 44 km · Haderslev 51 km · Rendsburg 56 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 Flensburg (54.788°, 9.4372°, elevation 33 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).