Haderslev weather in September

In September, Haderslev sees average daytime highs of 17°C and overnight lows near 11°C, with 63 mm of rain across 11.4 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 15°C by the end. The sky is clear or mostly clear about 16% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Haderslev's 6th-clearest and 7th-windiest month. For the whole year in context, see Haderslev's year-round climate.

Daytime high
17°
4th warmest
Overnight low
11°
10th coldest
Rainfall
63 mm
11.4 wet days
Daylight
12 h 24 min
6:03 AM – 6:30 PM
Cloud cover
69%
6th clearest
Wind
16 km/h
7th windiest
Solar energy
2.8 kWh/m²
Travel score
5.0
out of 10

Haderslev is town in Denmark.

Founded
1050

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 18°C in the first days to 15°C by the end.

A typical September day in Haderslev reaches about 17°C in the afternoon and slips back to 11°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 20°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11912
21812
31812
41812
51812
61812
71812
81812
91812
101812
111712
121712
131711
141711
151711
161711
171711
181611
191611
201611
211611
221611
231610
241610
251510
261510
271510
281510
291510
301510

How September really feels in Haderslev

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.

Haderslev weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6412.73.17.50.0
Feb / 5010.13.19.20.0
Mar / 5010.8211.40.6
Apr11° / 419.20.513.82.6
May15° / 5410.2015.94.6
Jun18° / 11°6610.60175.6
Jul20° / 13°6711.9016.66.1
Aug20° / 14°7312.5014.85.9
Sep17° / 11°6311.4012.55.0
Oct12° / 7012.8010.13.0
Nov / 6011.90.68.11.1
Dec / 6712.42.370.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43565
53565
63565
73466
83466
93466
103466
113367
123367
133367
143367
153367
163367
173268
183169
193169
203169
213070
223169
233169
243070
253070
263070
273169
283070
293070
303169

Chance of precipitation in September

Any precipitation

Haderslev gets around 63 mm of rain over 11.4 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 39% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
342
442
541
641
741
841
940
1040
1139
1239
1338
1437
1537
1637
1736
1836
1936
2035
2135
2236
2336
2436
2537
2637
2738
2839
2940
3040

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 (%)
1623251
2623251
3643240
4643240
5663130
6663130
7673030
8682930
9692830
10702730
11712630
12732520
13742420
14752320
15762220
16772120
17792010
18801910
19811810
20821710
21821710
22841600
23851500
24851500
25861400
26861400
27871300
28881200
29881200
30891100

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 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 132 minutes over September. Sunrise moves from 5:34 AM to 6:31 AM, and sunset from 7:10 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:347:10
213.55:367:07
313.45:387:04
413.45:407:02
513.35:426:59
613.25:446:57
713.15:456:54
813.15:476:51
913.05:496:49
1012.95:516:46
1112.85:536:43
1212.85:556:41
1312.75:576:38
1412.65:596:35
1512.56:016:32
1612.46:036:30
1712.46:056:27
1812.36:076:24
1912.26:096:22
2012.16:116:19
2112.16:136:16
2212.06:156:14
2311.96:176:11
2411.86:196:08
2511.76:216:06
2611.76:236:03
2711.66:256:00
2811.56:275:57
2911.46:295:55
3011.46:315:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.8 kWh/m².

For context, solar energy here swings from a low near 0.39 kWh/m² to a high of 5.66 kWh/m² in June across the year — September's 2.8 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.4Moderate
43.4Moderate
53.3Moderate
63.3Moderate
73.2Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.8Moderate
162.8Moderate
172.7Moderate
182.7Moderate
192.6Moderate
202.6Moderate
212.5Moderate
222.5Moderate
232.4Moderate
242.4Moderate
252.3Moderate
262.3Moderate
272.3Moderate
282.2Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Haderslev?

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

5.0
Sightseeing
4th-best month of the year
1.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Haderslev for sightseeing.

What to pack for Haderslev in September

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

In September, Haderslev sees daytime highs around 17°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Haderslev in September

The nearest coast averages about 16°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 28 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
Jan2Bracing
Feb2Bracing
Mar2Bracing
Apr4Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec4Bracing

UV index in Haderslev 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 Haderslev peaks around July 13 at about 6 (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 13UV 6Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5Moderate
Jun6High
Jul6High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Haderslev?

Haderslev sits at 55.2°N, 9.5°E, 13 m above sea level, in Denmark. The nearest listed city is Aabenraa, 23 km away.

KoldingMiddelfartFredericiaSønderborgVejleFlensburgTønder

Topography around Haderslev

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

Within 3 km, the terrain around Haderslev has only modest variations in elevation — a maximum elevation change of 67 m around an average of 28 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 150 m.

The land around Haderslev is covered by grassland (27%), cropland (24%) and trees (23%) within 3 km, cropland (47%) within 16 km, and cropland (38%) and water (28%) within 80 km.

3 km
67 m
16 km
99 m
80 km
150 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Aabenraa 23 km · Kolding 27 km · Middelfart 32 km · Fredericia 39 km · Sønderborg 42 km · Vejle 51 km · Flensburg 51 km · Tønder 53 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 Haderslev (55.2494°, 9.4877°, elevation 13 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).