Björlanda weather in September

In September, Björlanda sees average daytime highs of 16°C and overnight lows near 11°C, with 94 mm of rain across 13.2 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 14°C by the end. The sky is clear or mostly clear about 25% 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 Björlanda's 6th-clearest and 6th-windiest month. For the whole year in context, see Björlanda's year-round climate.

Daytime high
16°
4th warmest
Overnight low
11°
9th coldest
Rainfall
94 mm
13.2 wet days
Daylight
12 h 30 min
5:52 AM – 6:22 PM
Cloud cover
63%
6th clearest
Wind
19 km/h
6th windiest
Solar energy
2.81 kWh/m²
Travel score
4.4
out of 10

Björlanda is urban area in Gothenburg Municipality, Sweden.

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 17°C in the first days to 14°C by the end.

A typical September day in Björlanda reaches about 16°C in the afternoon and slips back to 11°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11713
21713
31713
41713
51713
61712
71712
81712
91612
101612
111612
121612
131612
141612
151611
161611
171511
181511
191511
201511
211511
221511
231511
241410
251410
261410
271410
281410
291410
301410

How September really feels in Björlanda

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.

Björlanda weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°7312.54.970.0
Feb / -1°5410.24.68.90.0
Mar / 499.83.411.40.1
Apr / 499.70.7141.8
May14° / 6110.60.116.33.9
Jun17° / 12°8511.7017.65.1
Jul19° / 14°8111.6017.16.0
Aug19° / 14°10614.6015.15.5
Sep16° / 11°9413.2012.54.4
Oct11° / 102150.4102.4
Nov / 8213.81.17.60.7
Dec / 7813.63.56.30.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% 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 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24753
34753
44753
54753
64654
74753
84654
94654
104654
114456
124456
134456
144456
154357
164357
174258
184258
194258
204159
214159
224159
234159
244060
254060
264060
273961
283961
293961
303862

Chance of precipitation in September

Any precipitation

Björlanda gets around 94 mm of rain over 13.2 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 45% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
148
248
347
447
547
646
746
846
946
1046
1146
1246
1345
1445
1544
1644
1743
1843
1943
2042
2142
2242
2342
2442
2543
2643
2744
2844
2945
3045

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
167294
269283
370273
471272
572262
673252
775241
876231
977221
1079201
1180191
1281181
1382171
1483161
1585150
1686140
1787130
1888120
1989110
2089110
2190100
2290100
2390100
249190
259190
269190
279280
289280
299370
309370

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020breezy

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 5:20 AM to 6:23 AM, and sunset from 7:05 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:207:05
213.75:227:02
313.65:246:59
413.55:266:57
513.45:286:54
613.35:306:51
713.35:336:48
813.25:356:45
913.15:376:42
1013.05:396:39
1112.95:416:36
1212.85:446:33
1312.75:466:30
1412.75:486:28
1512.65:506:25
1612.55:526:22
1712.45:546:19
1812.35:576:16
1912.25:596:13
2012.16:016:10
2112.16:036:07
2212.06:056:04
2311.96:086:01
2411.86:105:58
2511.76:125:55
2611.66:145:52
2711.66:165:50
2811.56:195:47
2911.46:215:44
3011.36:235:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.81 kWh/m².

For context, solar energy here swings from a low near 0.28 kWh/m² to a high of 5.93 kWh/m² in June across the year — September's 2.81 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
272.2Moderate
282.2Moderate
292.1Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Björlanda?

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

4.4
Sightseeing
4th-best month of the year
0.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Björlanda for sightseeing.

What to pack for Björlanda in September

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

In September, Björlanda sees daytime highs around 16°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Björlanda 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 16 km away) is warmest in August at about 18°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
Aug18Cool
Sep16Cool
Oct12Bracing
Nov8Bracing
Dec5Bracing

UV index in Björlanda 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 Björlanda peaks around June 18 at about 5 (moderate) — 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 5 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 18UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May5Moderate
Jun5Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Björlanda?

Björlanda sits at 57.8°N, 11.8°E, 8 m above sea level, in Sweden. The nearest listed city is Majorna, 10 km away.

Topography around Björlanda

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

Within 3 km, the terrain around Björlanda has only modest variations in elevation — a maximum elevation change of 57 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 151 m; within 80 km, significant variations in elevation — a maximum elevation change of 344 m.

The land around Björlanda is covered by trees (40%) and grassland (30%) within 3 km, trees (39%) and water (31%) within 16 km, and water (45%) and trees (41%) within 80 km.

3 km
57 m
16 km
151 m
80 km
344 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Majorna 10 km · Gothenburg 10 km · Kungälv 15 km · Västra Frölunda 15 km · Mölndal 16 km · Partille 16 km · Mölnlycke 21 km · Lerum 26 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 Björlanda (57.7667°, 11.8333°, elevation 8 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).