Trondheim weather in August

In August, Trondheim sees average daytime highs of 19°C and overnight lows near 11°C, with 99 mm of rain across 14.9 wet days and about 15.9 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 12% of the time in August, and the air most often feels dry.

Daylight stretches from about 17 h 30 min at the start of August to 14 h 18 min by month's end. Set against the rest of the year, August is Trondheim's 8th-clearest and 11th-windiest month. For the whole year in context, see Trondheim's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
11°
11th coldest
Rainfall
99 mm
14.9 wet days
Daylight
15 h 54 min
4:24 AM – 8:21 PM
Cloud cover
75%
8th clearest
Wind
7 km/h
11th windiest
Solar energy
3.43 kWh/m²
Travel score
5.1
out of 10

Trondheim is city in Trøndelag, Norway.

Air quality
Good
PM2.5 5.7 µg/m³ · 2019
Density
3,766/km²
people per km²
Founded
~997 CE

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 20°C in the first days to 17°C by the end.

A typical August day in Trondheim reaches about 19°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 13°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)
12012
22012
32012
42011
52011
62011
72011
81911
91911
101911
111911
121911
131911
141911
151911
161911
171811
181810
191810
201810
211810
221810
231810
241810
251810
261710
271710
28179
29179
30179
31179

How August really feels in Trondheim

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.

Trondheim weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°9615.912.75.20.0
Feb / -5°8414.211.98.10.0
Mar / -3°8815.410.811.20.1
Apr / 6713.65.414.51.6
May13° / 7015.61.417.73.2
Jun16° / 9515.6019.84.3
Jul19° / 11°8514.8018.95.3
Aug19° / 11°9914.9015.95.1
Sep14° / 10214.8012.73.6
Oct / 8715.22.89.41.3
Nov / -1°7913.27.36.20.0
Dec / -4°9415.310.74.20.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 11% of August, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12476
22476
32476
42476
52377
62377
72278
82377
92278
102278
112278
122278
132377
142377
152377
162377
172377
182377
192377
202377
212377
222377
232377
242377
252377
262377
272377
282377
292278
302278
312377

Chance of precipitation in August

Any precipitation

Trondheim gets around 99 mm of rain over 14.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
145
245
345
445
545
645
745
846
946
1046
1146
1246
1346
1446
1546
1646
1747
1847
1947
2048
2148
2249
2349
2449
2550
2650
2751
2851
2951
3051
3151

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 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
176213
276213
376213
478202
579192
680182
781172
882171
983161
1084151
1185141
1286131
1387121
1488111
1589110
1690100
1790100
1890100
199190
209190
219190
229190
239190
249280
259280
269280
279370
289370
299460
309460
319460

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 17 h 30 min at the start of August to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 192 minutes over August. Sunrise moves from 3:40 AM to 5:08 AM, and sunset from 9:09 PM to 7:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
117.53:409:09
217.43:439:06
317.33:469:03
417.23:499:00
517.13:528:57
617.03:558:54
716.93:578:50
816.84:008:47
916.74:038:44
1016.64:068:41
1116.54:098:37
1216.44:128:34
1316.34:158:31
1416.24:188:27
1516.04:218:24
1615.94:248:21
1715.84:278:17
1815.74:308:14
1915.64:338:11
2015.54:368:07
2115.44:398:04
2215.34:428:00
2315.24:457:57
2415.14:487:53
2515.04:517:50
2614.94:547:46
2714.84:577:43
2814.75:007:39
2914.65:027:36
3014.45:057:32
3114.35:087:29

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.43 kWh/m².

For context, solar energy here swings from a low near 0.06 kWh/m² to a high of 4.7 kWh/m² in June across the year — August's 3.43 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.4Moderate
173.4Moderate
183.4Moderate
193.3Moderate
203.3Moderate
213.2Moderate
223.2Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.0Moderate
273.0Moderate
283.0Moderate
292.9Moderate
302.9Moderate
312.8Moderate
Planning a trip in August

Is August a good time to visit Trondheim?

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

5.1
Sightseeing
2nd-best month of the year
2.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Trondheim for sightseeing.

What to pack for Trondheim in August

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

In August, Trondheim sees daytime highs around 19°C and nights near 11°C. Pack rain gear. About 15 days see rain.

rain gear

Sea temperature near Trondheim in August

The nearest coast averages about 14°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 55 km away) is warmest in August at about 14°C and coldest in March near 5°C.

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

5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan6Bracing
Feb6Bracing
Mar5Bracing
Apr6Bracing
May8Bracing
Jun10Bracing
Jul13Bracing
Aug14Bracing
Sep13Bracing
Oct11Bracing
Nov9Bracing
Dec7Bracing

UV index in Trondheim 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 Trondheim peaks around July 13 at about 4 (moderate) — 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 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 13UV 4Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb0Low
Mar1Low
Apr2Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug4Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Trondheim?

Trondheim sits at 63.4°N, 10.4°E, 18 m above sea level, in Norway. The nearest listed city is Stjørdalshalsen, 27 km away.

MoldeÖstersundAlesundLillehammer

Topography around Trondheim

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

Within 3 km, the terrain around Trondheim has significant variations in elevation — a maximum elevation change of 312 m around an average of 52 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 558 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,431 m.

The land around Trondheim is covered by trees (33%), artificial surfaces (31%) and water (31%) within 3 km, water (48%) and trees (34%) within 16 km, and grassland (37%), trees (36%) and water (22%) within 80 km.

3 km
312 m
16 km
558 m
80 km
1,431 m
treesgrasslandcroplandartificial surfaceswatermoss and lichen
August weather nearby: Stjørdalshalsen 27 km · Levanger 57 km · Åre 134 km · Kristiansund 138 km · Molde 180 km · Östersund 214 km · Alesund 239 km · Lillehammer 257 km

Norway travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 91% of US
price level, 2025
GDP per capita
$94,594
2025
Happiness
7.2 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
2.1
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 613
Religion
Church of Norway 68%other Christian 4%Muslim 3%Roman Catholic 3%

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 Trondheim (63.4305°, 10.3951°, elevation 18 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).