Tønsberg weather in August

In August, Tønsberg sees average daytime highs of 19°C and overnight lows near 15°C, with 91 mm of rain across 12.4 wet days and about 15.3 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 18°C by the end. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 30 min at the start of August to 14 hours by month's end. Set against the rest of the year, August is Tønsberg's 4th-clearest and 11th-windiest month. For the whole year in context, see Tønsberg's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
91 mm
12.4 wet days
Daylight
15 h 18 min
4:44 AM – 8:01 PM
Cloud cover
59%
4th clearest
Wind
13 km/h
11th windiest
Solar energy
4.18 kWh/m²
Travel score
5.9
out of 10

Tønsberg is city in Vestfold county, Norway.

Air quality
Good
PM2.5 6.9 µg/m³ · 2019
Density
5,362/km²
people per km²

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 18°C by the end.

A typical August day in Tønsberg reaches about 19°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12016
22016
32016
42016
52015
62015
72015
82015
92015
102015
112015
122015
132015
142015
152015
162015
172015
181915
191915
201914
211914
221914
231914
241914
251914
261814
271814
281814
291813
301813
311813

How August really feels in Tønsberg

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.

Tønsberg weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°8212.57.86.60.0
Feb / -2°588.76.38.70.0
Mar / 568.64.511.30.2
Apr / 528.21.214.11.9
May14° / 669.50.216.64.2
Jun18° / 12°8210.4018.15.7
Jul20° / 15°8210.3017.56.3
Aug19° / 15°9112.4015.35.9
Sep16° / 11°10711.4012.64.6
Oct10° / 12012.90.79.82.2
Nov / 1151437.30.4
Dec / -1°8612.95.55.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35149
45149
55050
65050
75050
85050
95050
105050
115149
125149
135149
145149
155149
165149
175149
185149
195149
205149
215149
225149
235149
245050
255050
265050
275050
285050
294951
304951
314852

Chance of precipitation in August

Any precipitation

Tønsberg gets around 91 mm of rain over 12.4 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 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
237
337
438
538
638
738
838
939
1039
1139
1239
1339
1439
1540
1640
1740
1841
1941
2041
2142
2242
2342
2442
2541
2641
2741
2840
2940
3039
3139

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 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
1364420
2364420
3374420
4374319
5384319
6394218
7414217
8424117
9434016
10453916
11463816
12473715
13493615
14503515
15523414
16523414
17533314
18553213
19553213
20573112
21583012
22602911
23612910
24622810
2564279
2666268
2767267
2868257
2970246
3072235
3173225

Wind in August

Winds average 13 km/h in August.

Across August, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 30 min at the start of August to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 150 minutes over August. Sunrise moves from 4:10 AM to 5:20 AM, and sunset from 8:39 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.54:108:39
216.44:128:37
316.34:148:34
416.34:178:32
516.24:198:29
616.14:218:27
716.04:238:24
815.94:268:22
915.94:288:19
1015.84:308:17
1115.74:338:14
1215.64:358:11
1315.54:378:09
1415.44:408:06
1515.44:428:03
1615.34:448:01
1715.24:477:58
1815.14:497:55
1915.04:517:52
2014.94:547:49
2114.84:567:46
2214.84:587:44
2314.75:017:41
2414.65:037:38
2514.55:067:35
2614.45:087:32
2714.35:107:29
2814.25:137:26
2914.15:157:23
3014.05:177:20
3114.05:207:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.18 kWh/m².

For context, solar energy here swings from a low near 0.23 kWh/m² to a high of 5.75 kWh/m² in June across the year — August's 4.18 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
313.4Moderate
Planning a trip in August

Is August a good time to visit Tønsberg?

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

5.9
Sightseeing
2nd-best month of the year
2.7
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Tønsberg for sightseeing.

What to pack for Tønsberg in August

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

In August, Tønsberg sees daytime highs around 19°C and nights near 15°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Tønsberg 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 16 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
Jul18Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Tønsberg in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tønsberg peaks around July 17 at about 5 (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 17UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul5Moderate
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Tønsberg?

Tønsberg sits at 59.3°N, 10.4°E, 16 m above sea level, in Norway. The nearest listed city is Horten, 17 km away.

Topography around Tønsberg

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

Within 3 km, the terrain around Tønsberg has only modest variations in elevation — a maximum elevation change of 101 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 222 m; within 80 km, large variations in elevation — a maximum elevation change of 907 m.

The land around Tønsberg is covered by trees (32%) and artificial surfaces (20%) within 3 km, water (38%) and trees (33%) within 16 km, and trees (58%) and water (30%) within 80 km.

3 km
101 m
16 km
222 m
80 km
907 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Horten 17 km · Sandefjord 19 km · Moss 23 km · Fredrikstad 30 km · Larvik 32 km · Sarpsborg 40 km · Porsgrunn 45 km · Skien 46 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 Tønsberg (59.2675°, 10.4076°, elevation 16 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).