Tønder weather in August

In August, Tønder sees average daytime highs of 20°C and overnight lows near 14°C, with 91 mm of rain across 14 wet days and about 14.7 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

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

Daylight stretches from about 15 h 42 min at the start of August to 13 h 42 min by month's end. Set against the rest of the year, August is Tønder's 4th-clearest and 11th-windiest month. For the whole year in context, see Tønder's year-round climate.

Daytime high
20°
1st warmest
Overnight low
14°
12th coldest
Rainfall
91 mm
14 wet days
Daylight
14 h 42 min
5:06 AM – 7:51 PM
Cloud cover
62%
4th clearest
Wind
17 km/h
11th windiest
Solar energy
4.34 kWh/m²
Travel score
5.7
out of 10

Tønder is town in Denmark.

Density
2,415/km²
people per km²
Founded
1017

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 20°C in the first days to 19°C by the end.

A typical August day in Tønder reaches about 20°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12115
22115
32115
42115
52015
62015
72015
82015
92015
102015
112015
122015
132015
142015
152015
162015
172015
182015
192014
202014
211914
221914
231914
241914
251914
261914
271914
281914
291914
301814
311813

How August really feels in Tønder

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.

Tønder weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7313.92.77.60.0
Feb / 5611.12.79.30.0
Mar / 5511.2211.40.5
Apr10° / 429.60.313.82.4
May14° / 5110.4015.84.2
Jun17° / 12°7111.20175.2
Jul19° / 14°7812.6016.55.8
Aug20° / 14°9114014.75.7
Sep17° / 12°8413.1012.54.7
Oct12° / 8914.2010.22.9
Nov / 7713.90.48.11.2
Dec / 77141.770.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64654
74654
84753
94753
104654
114555
124555
134555
144456
154456
164456
174456
184456
194456
204456
214456
224456
234357
244357
254357
264357
274357
284258
294258
304159
314159

Chance of precipitation in August

Any precipitation

Tønder gets around 91 mm of rain over 14 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 45% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
141
242
342
442
542
642
742
843
943
1043
1144
1244
1345
1445
1546
1646
1746
1846
1946
2047
2147
2247
2348
2448
2548
2648
2748
2848
2948
3048
3147

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 42% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13149181
23149191
33149191
43248191
53248191
63347191
73447191
83446191
93545201
103544200
113644200
123743200
133742200
143842200
153841200
163941200
173940201
184040191
194140191
204239181
214339171
224439161
234538151
244738141
254837131
265037121
275137111
285336101
29543691
30563581
31573571

Wind in August

Winds average 17 km/h in August.

Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 120 minutes over August. Sunrise moves from 4:39 AM to 5:35 AM, and sunset from 8:22 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.74:398:22
215.74:408:21
315.64:428:19
415.54:448:17
515.54:468:15
615.44:488:13
715.44:498:11
815.34:518:09
915.24:538:06
1015.24:558:04
1115.14:578:02
1215.04:598:00
1315.05:017:58
1414.95:037:56
1514.85:047:53
1614.75:067:51
1714.75:087:49
1814.65:107:46
1914.55:127:44
2014.55:147:42
2114.45:167:39
2214.35:187:37
2314.25:207:34
2414.25:227:32
2514.15:237:29
2614.05:257:27
2714.05:277:24
2813.95:297:22
2913.85:317:19
3013.75:337:17
3113.75:357:14

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.34 kWh/m².

For context, solar energy here swings from a low near 0.4 kWh/m² to a high of 5.64 kWh/m² in June across the year — August's 4.34 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Tønder?

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

5.7
Sightseeing
2nd-best month of the year
2.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Tønder for sightseeing.

What to pack for Tønder in August

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

In August, Tønder sees daytime highs around 20°C and nights near 14°C. Pack rain gear. About 14 days see rain.

rain gear

Sea temperature near Tønder 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 17 km away) is warmest in August at about 19°C and coldest in February near 3°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
Jan4Bracing
Feb3Bracing
Mar4Bracing
Apr7Bracing
May11Bracing
Jun15Bracing
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec5Bracing

UV index in Tønder 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 Tønder peaks around July 21 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 21UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul6High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Tønder?

Tønder sits at 54.9°N, 8.9°E, 3 m above sea level, in Denmark. The nearest listed city is Aabenraa, 37 km away.

AabenraaFlensburgHusumHaderslevSønderborgSchleswigEsbjergKolding

Topography around Tønder

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

Within 3 km, the terrain around Tønder has only modest variations in elevation — a maximum elevation change of 16 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 50 m; within 80 km, only modest variations in elevation — a maximum elevation change of 123 m.

The land around Tønder is covered by cropland (43%) and grassland (37%) within 3 km, cropland (50%) and grassland (34%) within 16 km, and water (40%), cropland (29%) and grassland (20%) within 80 km.

3 km
16 m
16 km
50 m
80 km
123 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Aabenraa 37 km · Flensburg 40 km · Husum 51 km · Haderslev 53 km · Sønderborg 59 km · Schleswig 64 km · Esbjerg 65 km · Kolding 73 km

Denmark travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E / F / K
230 V · 50 Hz
Prices
≈ 92% of US
price level, 2025
GDP per capita
$76,970
2025
Happiness
7.5 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
3.7
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 611
Religion
Evangelical Lutheran 71%other/none/unspecified 24%Muslim 4%

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 Tønder (54.9331°, 8.8667°, elevation 3 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).