Västervik weather in September

In September, Västervik sees average daytime highs of 16°C and overnight lows near 11°C, with 52 mm of rain across 9.3 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 22% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Västervik's 6th-clearest and 7th-windiest month. For the whole year in context, see Västervik's year-round climate.

Daytime high
16°
4th warmest
Overnight low
11°
9th coldest
Rainfall
52 mm
9.3 wet days
Daylight
12 h 30 min
5:33 AM – 6:02 PM
Cloud cover
63%
6th clearest
Wind
18 km/h
7th windiest
Solar energy
2.88 kWh/m²
Travel score
5.0
out of 10

Västervik is urban area in Västervik Municipality, Sweden.

Air quality
Excellent
PM2.5 4.6 µg/m³ · 2017

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 14°C by the end.

A typical September day in Västervik reaches about 16°C in the afternoon and slips back to 11°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 19°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)
11813
21813
31813
41812
51812
61712
71712
81712
91712
101712
111712
121712
131611
141611
151611
161611
171611
181611
191511
201510
211510
221510
231510
241510
251410
261410
27149
28149
29149
30149

How September really feels in Västervik

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.

Västervik weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°389.76.270.0
Feb / -2°369.16.68.90.0
Mar / -0°308.13.311.40.1
Apr / 327.31.3141.4
May12° / 449.40.116.33.5
Jun17° / 11°5810.2017.65.4
Jul20° / 14°6710.4017.16.3
Aug20° / 14°6010.6015.16.2
Sep16° / 11°529.3012.55.0
Oct11° / 58110.1102.4
Nov / 5912.32.47.60.5
Dec / 5011.24.76.30.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% 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 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24258
34258
44258
54357
64258
74258
84258
94258
104357
114159
124159
134159
144159
154159
164159
174060
184159
194159
204060
214060
224159
234159
244159
254060
264060
274060
283961
293961
303961

Chance of precipitation in September

Any precipitation

Västervik gets around 52 mm of rain over 9.3 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 32% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
235
335
434
533
633
733
832
932
1032
1132
1232
1332
1432
1532
1632
1731
1831
1931
2031
2130
2230
2330
2430
2530
2630
2730
2830
2930
3030

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 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
167276
269265
369265
471254
573243
673243
775232
876222
977212
1079201
1180191
1281181
1382171
1484160
1585150
1686140
1787130
1888120
1989110
2090100
219190
229280
239370
249370
259460
269460
279550
289550
299550
309640

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 48 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 150 minutes over September. Sunrise moves from 5:00 AM to 6:04 AM, and sunset from 6:46 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:006:46
213.75:036:43
313.65:056:40
413.55:076:37
513.45:096:35
613.35:116:32
713.35:136:29
813.25:166:26
913.15:186:23
1013.05:206:20
1112.95:226:17
1212.85:246:14
1312.75:276:11
1412.75:296:08
1512.65:316:05
1612.55:336:02
1712.45:356:00
1812.35:375:57
1912.25:405:54
2012.15:425:51
2112.15:445:48
2212.05:465:45
2311.95:485:42
2411.85:515:39
2511.75:535:36
2611.65:555:33
2711.65:575:30
2811.55:595:27
2911.46:025:25
3011.36:045:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.88 kWh/m².

For context, solar energy here swings from a low near 0.28 kWh/m² to a high of 6 kWh/m² in June across the year — September's 2.88 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.3Moderate
73.3Moderate
83.2Moderate
93.2Moderate
103.1Moderate
113.1Moderate
123.0Moderate
133.0Moderate
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 Västervik?

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
0.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Västervik for sightseeing.

What to pack for Västervik in September

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

In September, Västervik sees daytime highs around 16°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Västervik in September

The nearest coast averages about 15°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 19 km away) is warmest in August at about 18°C and coldest in March near 2°C.

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

0°5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar2Bracing
Apr4Bracing
May7Bracing
Jun13Bracing
Jul17Cool
Aug18Cool
Sep15Bracing
Oct11Bracing
Nov7Bracing
Dec5Bracing

UV index in Västervik in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Västervik peaks around June 17 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 20 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 17UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun6High
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Västervik?

Västervik sits at 57.8°N, 16.6°E, 11 m above sea level, in Sweden. The nearest listed city is Oskarshamn, 56 km away.

LinköpingNorrköpingVisbyNyköpingNässjöKalmarMotala

Topography around Västervik

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

Within 3 km, the terrain around Västervik has only modest variations in elevation — a maximum elevation change of 60 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 106 m; within 80 km, significant variations in elevation — a maximum elevation change of 315 m.

The land around Västervik is covered by trees (43%) and water (27%) within 3 km, water (50%) and trees (42%) within 16 km, and trees (52%) and water (40%) within 80 km.

3 km
60 m
16 km
106 m
80 km
315 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Oskarshamn 56 km · Linköping 94 km · Norrköping 97 km · Visby 99 km · Nyköping 113 km · Nässjö 116 km · Kalmar 123 km · Motala 128 km

Sweden travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 87% of US
price level, 2025
GDP per capita
$63,133
2025
Happiness
7.3 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
3.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 609
Religion
Church of Sweden 54%none or unspecified 37%other 9%

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 Västervik (57.7584°, 16.6373°, elevation 11 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).