Wismar weather in September

In September, Wismar sees average daytime highs of 18°C and overnight lows near 11°C, with 56 mm of rain across 10.4 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 16°C by the end. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Wismar's 6th-clearest and 7th-windiest month. For the whole year in context, see Wismar's year-round climate.

Daytime high
18°
4th warmest
Overnight low
11°
9th coldest
Rainfall
56 mm
10.4 wet days
Daylight
12 h 24 min
5:56 AM – 6:21 PM
Cloud cover
66%
6th clearest
Wind
16 km/h
7th windiest
Solar energy
2.99 kWh/m²
Travel score
5.5
out of 10
Air quality
Moderate
PM2.5 12.1 µg/m³ · 2019

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 20°C in the first days to 16°C by the end.

A typical September day in Wismar reaches about 18°C in the afternoon and slips back to 11°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 22°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)
12013
22013
32013
41913
51912
61912
71912
81912
91912
101912
111912
121812
131812
141811
151811
161811
171811
181811
191711
201711
211711
221710
231710
241710
251610
261610
271610
281610
291610
301610

How September really feels in Wismar

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.

Wismar weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°5311.63.27.70.0
Feb / -0°4310.33.79.40.0
Mar / 4610.12.211.50.9
Apr12° / 419.30.313.73.2
May16° / 5510.6015.75.1
Jun20° / 12°6511.7016.75.8
Jul22° / 14°7112.4016.36.3
Aug22° / 14°7112.2014.66.2
Sep18° / 11°5610.4012.55.5
Oct13° / 5411.30.110.23.3
Nov / 4911.50.78.31.0
Dec / 5611.92.87.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24258
34258
44159
54060
64159
74159
84159
93961
103961
113961
123961
133961
143862
153862
163862
173763
183763
193664
203565
213565
223565
233565
243466
253466
263367
273367
283367
293367
303268

Chance of precipitation in September

Any precipitation

Wismar gets around 56 mm of rain over 10.4 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 35% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
341
441
540
639
738
838
937
1036
1135
1234
1333
1432
1532
1631
1731
1831
1931
2031
2131
2231
2332
2432
2533
2634
2734
2835
2936
3037

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
166286
267276
368275
469265
570264
671254
773243
873243
974233
1075223
1177212
1278202
1380182
1481172
1582162
1683152
1785141
1886131
1986131
2087121
2187121
2288120
2388120
2488120
2588120
2689110
2789110
2889110
2989110
3090100

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 16 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
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
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 30 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 126 minutes over September. Sunrise moves from 5:28 AM to 6:22 AM, and sunset from 6:59 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:286:59
213.45:306:57
313.45:326:54
413.35:346:52
513.25:366:49
613.25:376:47
713.15:396:44
813.05:416:42
912.95:436:39
1012.95:456:37
1112.85:476:34
1212.75:486:32
1312.65:506:29
1412.65:526:26
1512.55:546:24
1612.45:566:21
1712.45:586:19
1812.35:596:16
1912.26:016:13
2012.16:036:11
2112.16:056:08
2212.06:076:06
2311.96:096:03
2411.86:116:01
2511.86:125:58
2611.76:145:55
2711.66:165:53
2811.56:185:50
2911.56:205:48
3011.46:225:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.99 kWh/m².

For context, solar energy here swings from a low near 0.45 kWh/m² to a high of 5.64 kWh/m² in June across the year — September's 2.99 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.1Moderate
143.1Moderate
153.0Moderate
163.0Moderate
172.9Moderate
182.9Moderate
192.8Moderate
202.8Moderate
212.7Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.5Moderate
262.5Moderate
272.4Moderate
282.4Moderate
292.3Moderate
302.3Moderate
Planning a trip in September

Is September a good time to visit Wismar?

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

5.5
Sightseeing
4th-best month of the year
1.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Wismar for sightseeing.

What to pack for Wismar in September

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

In September, Wismar sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Wismar 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 26 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
Apr6Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec5Bracing

UV index in Wismar 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 Wismar peaks around June 18 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 21 at about 0 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 18UV 6Dec 21UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr3Moderate
May5High
Jun6High
Jul6High
Aug5Moderate
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low

Air quality in Wismar in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Wismar is worst in April — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Wismar's WHO annual average of 12.1 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1516 µg/m³Dec 108 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar15Moderate
Apr16Moderate
May14Moderate
Jun15Moderate
Jul14Moderate
Aug14Moderate
Sep12Moderate
Oct10Good
Nov8Good
Dec8Good
Location & terrain

Where is Wismar?

Wismar sits at 53.9°N, 11.5°E, 1 m above sea level, in Germany. The nearest listed city is Schwerin, 29 km away.

RatekauNeustadt in HolsteinGüstrowKröpeliner-Tor-VorstadtBad SchwartauRostockLübeck

Topography around Wismar

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

Within 3 km, the terrain around Wismar has only modest variations in elevation — a maximum elevation change of 42 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 129 m; within 80 km, only modest variations in elevation — a maximum elevation change of 196 m.

The land around Wismar is covered by trees (27%), artificial surfaces (25%) and grassland (20%) within 3 km, cropland (48%) within 16 km, and cropland (36%), water (27%) and trees (21%) within 80 km.

3 km
42 m
16 km
129 m
80 km
196 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Schwerin 29 km · Ratekau 48 km · Neustadt in Holstein 48 km · Güstrow 48 km · Kröpeliner-Tor-Vorstadt 48 km · Bad Schwartau 50 km · Rostock 50 km · Lübeck 50 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 Wismar (53.8922°, 11.4556°, elevation 1 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. 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).