Schleswig weather in September

In September, Schleswig sees average daytime highs of 17°C and overnight lows near 10°C, with 64 mm of rain across 11.1 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 19°C in the first days to 16°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 Schleswig's 6th-clearest and 9th-windiest month. For the whole year in context, see Schleswig's year-round climate.

Daytime high
17°
4th warmest
Overnight low
10°
9th coldest
Rainfall
64 mm
11.1 wet days
Daylight
12 h 24 min
6:03 AM – 6:29 PM
Cloud cover
69%
6th clearest
Wind
14 km/h
9th windiest
Solar energy
2.82 kWh/m²
Travel score
5.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 16°C by the end.

A typical September day in Schleswig reaches about 17°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°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
21912
31912
41912
51911
61911
71811
81811
91811
101811
111811
121811
131811
141811
151711
161710
171710
181710
191710
201710
211710
221610
231610
241610
25169
26169
27169
28169
29159
30159

How September really feels in Schleswig

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.

Schleswig 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 / -0°6612.52.87.60.0
Feb / -0°5110.539.30.0
Mar / 5211.11.911.50.9
Apr12° / 45100.313.73.1
May16° / 5810.8015.74.9
Jun19° / 11°7011.8016.95.7
Jul21° / 13°7812.8016.46.0
Aug21° / 13°7812.9014.76.0
Sep17° / 10°6411.1012.55.2
Oct13° / 6712.4010.23.1
Nov / 5812.10.68.21.0
Dec / 6512.82.67.10.0

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 18% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53763
63763
73664
83664
93664
103565
113565
123565
133466
143565
153565
163565
173565
183466
193466
203466
213268
223268
233268
243268
253169
263169
273070
283070
293070
303070

Chance of precipitation in September

Any precipitation

Schleswig gets around 64 mm of rain over 11.1 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 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
340
439
539
639
739
838
938
1038
1137
1237
1336
1436
1536
1636
1736
1836
1936
2036
2136
2236
2336
2437
2537
2638
2739
2840
2940
3041

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 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1623161
2653050
3653050
4663040
5672940
6672940
7692830
8692830
9702730
10712630
11722530
12732430
13752320
14772120
15782020
16791920
17801820
18821710
19831610
20841510
21841510
22851410
23861400
24871300
25871300
26871300
27881200
28881200
29881200
30891100

Wind in September

Winds average 14 km/h in September.

Across September, 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.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light 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

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 5:35 AM to 6:30 AM, and sunset from 7:08 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:357:08
213.55:377:06
313.45:397:03
413.35:407:00
513.35:426:58
613.25:446:55
713.15:466:53
813.05:486:50
913.05:506:47
1012.95:526:45
1112.85:546:42
1212.75:556:40
1312.75:576:37
1412.65:596:34
1512.56:016:32
1612.46:036:29
1712.46:056:26
1812.36:076:24
1912.26:096:21
2012.16:116:19
2112.16:126:16
2212.06:146:13
2311.96:166:11
2411.86:186:08
2511.86:206:05
2611.76:226:03
2711.66:246:00
2811.56:265:58
2911.56:285:55
3011.46:305:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.82 kWh/m².

For context, solar energy here swings from a low near 0.42 kWh/m² to a high of 5.46 kWh/m² in June across the year — September's 2.82 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.4Moderate
33.4Moderate
43.4Moderate
53.3Moderate
63.3Moderate
73.2Moderate
83.2Moderate
93.1Moderate
103.1Moderate
113.0Moderate
123.0Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.8Moderate
172.8Moderate
182.7Moderate
192.7Moderate
202.6Moderate
212.6Moderate
222.5Moderate
232.5Moderate
242.4Moderate
252.4Moderate
262.3Moderate
272.3Moderate
282.2Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Schleswig?

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

5.2
Sightseeing
4th-best month of the year
1.4
Beach & pool
4th-best month of the year

September is a reasonable time to visit Schleswig for sightseeing.

What to pack for Schleswig in September

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

In September, Schleswig sees daytime highs around 17°C and nights near 10°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Schleswig 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 38 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 Schleswig 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 Schleswig peaks around July 20 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 20UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Schleswig?

Schleswig sits at 54.5°N, 9.6°E, 22 m above sea level, in Germany. The nearest listed city is Eckernförde, 18 km away.

HeideElmschenhagen

Topography around Schleswig

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

Within 3 km, the terrain around Schleswig has only modest variations in elevation — a maximum elevation change of 64 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 124 m; within 80 km, significant variations in elevation — a maximum elevation change of 256 m.

The land around Schleswig is covered by trees (32%) and water (21%) within 3 km, cropland (44%), grassland (29%) and trees (20%) within 16 km, and water (34%), cropland (29%) and grassland (23%) within 80 km.

3 km
64 m
16 km
124 m
80 km
256 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Eckernförde 18 km · Rendsburg 25 km · Flensburg 31 km · Husum 34 km · Kiel 43 km · Sønderborg 46 km · Heide 47 km · Elmschenhagen 48 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 Schleswig (54.5202°, 9.5683°, elevation 22 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).