Trollhättan weather in August

In August, Trollhättan sees average daytime highs of 20°C and overnight lows near 12°C, with 90 mm of rain across 13.7 wet days and about 15.1 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 23% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 18 min at the start of August to 13 h 54 min by month's end. Set against the rest of the year, August is Trollhättan's 5th-clearest and 11th-windiest month. For the whole year in context, see Trollhättan's year-round climate.

Daytime high
20°
2nd warmest
Overnight low
12°
11th coldest
Rainfall
90 mm
13.7 wet days
Daylight
15 h 06 min
4:41 AM – 7:49 PM
Cloud cover
64%
5th clearest
Wind
12 km/h
11th windiest
Solar energy
4.17 kWh/m²
Travel score
5.8
out of 10

Trollhättan is urban area in Trollhättan Municipality, Sweden.

Founded
1916

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical August day in Trollhättan reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 25°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52113
62113
72113
82113
92113
102113
112113
122113
132113
142113
152012
162012
172012
182012
192012
202012
212012
222012
231912
241912
251911
261911
271911
281911
291911
301811
311811

How August really feels in Trollhättan

Once humidity and wind are folded in, August 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

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Trollhättan weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°6011.25.76.80.0
Feb / -3°469.35.68.90.0
Mar / -1°438.93.911.40.4
Apr11° / 499.41.1142.6
May15° / 6211.30.116.44.6
Jun19° / 10°8613.1017.85.5
Jul21° / 13°8412.4017.26.1
Aug20° / 12°9013.7015.15.8
Sep16° / 7511.6012.54.7
Oct11° / 7712.80.59.92.3
Nov / 61122.37.50.4
Dec / -1°6511.84.76.20.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34555
44555
54555
64456
74456
84456
94456
104555
114456
124456
134456
144357
154357
164357
174357
184357
194357
204258
214357
224159
234159
244159
254060
264060
273961
283961
294060
304060
313961

Chance of precipitation in August

Any precipitation

Trollhättan gets around 90 mm of rain over 13.7 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
141
241
342
442
542
642
743
843
943
1043
1143
1243
1343
1443
1543
1643
1743
1844
1944
2044
2145
2245
2345
2446
2546
2646
2746
2846
2946
3046
3145

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1444411
2444411
3444511
4444510
5454510
6454510
746459
846449
947449
1048439
1149438
1250428
1351418
1451418
1552408
1654388
1756377
1857367
1958357
2059347
2160337
2261327
2364306
2465296
2566286
2668275
2769265
2871245
2973234
3074224
3175214

Wind in August

Winds average 12 km/h in August.

Across August, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 18 min at the start of August to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 144 minutes over August. Sunrise moves from 4:08 AM to 5:14 AM, and sunset from 8:26 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.34:088:26
216.24:108:23
316.14:128:21
416.14:148:19
516.04:178:17
615.94:198:14
715.84:218:12
815.84:238:09
915.74:258:07
1015.64:288:04
1115.54:308:02
1215.54:327:59
1315.44:347:57
1415.34:367:54
1515.24:397:52
1615.14:417:49
1715.14:437:46
1815.04:457:44
1914.94:487:41
2014.84:507:38
2114.74:527:36
2214.64:547:33
2314.64:567:30
2414.54:597:27
2514.45:017:24
2614.35:037:22
2714.25:057:19
2814.15:087:16
2914.15:107:13
3014.05:127:10
3113.95:147:07

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.17 kWh/m².

For context, solar energy here swings from a low near 0.25 kWh/m² to a high of 5.72 kWh/m² in June across the year — August's 4.17 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.0Bright
204.0Bright
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
313.4Moderate
Planning a trip in August

Is August a good time to visit Trollhättan?

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

5.8
Sightseeing
2nd-best month of the year
3.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Trollhättan for sightseeing.

What to pack for Trollhättan in August

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

In August, Trollhättan sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Trollhättan in August

The nearest coast averages about 18°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 56 km away) is warmest in August at about 18°C and coldest in February near 3°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
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr6Bracing
May11Bracing
Jun15Bracing
Jul17Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Trollhättan in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Trollhättan peaks around June 17 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 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJun 17UV 5Dec 20UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May5Moderate
Jun5Moderate
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low
Location & terrain

Where is Trollhättan?

Trollhättan sits at 58.3°N, 12.3°E, 49 m above sea level, in Sweden. The nearest listed city is Vänersborg, 11 km away.

Topography around Trollhättan

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

Within 3 km, the terrain around Trollhättan has only modest variations in elevation — a maximum elevation change of 107 m around an average of 57 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, significant variations in elevation — a maximum elevation change of 343 m.

The land around Trollhättan is covered by trees (50%) and artificial surfaces (24%) within 3 km, trees (63%) within 16 km, and trees (50%) and water (28%) within 80 km.

3 km
107 m
16 km
186 m
80 km
343 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Vänersborg 11 km · Uddevalla 21 km · Alingsås 42 km · Kungälv 49 km · Lidköping 56 km · Lerum 57 km · Partille 61 km · Björlanda 63 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 Trollhättan (58.2837°, 12.2886°, elevation 49 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).