Oslo weather in August

In August, Oslo sees average daytime highs of 19°C and overnight lows near 11°C, with 112 mm of rain across 14.2 wet days and about 15.3 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 18% of the time in August, and the air most often feels dry.

Daylight stretches from about 16 h 36 min at the start of August to 14 hours by month's end. Set against the rest of the year, August is Oslo's 7th-clearest and 11th-windiest month. For the whole year in context, see Oslo's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
11°
11th coldest
Rainfall
112 mm
14.2 wet days
Daylight
15 h 24 min
4:40 AM – 8:02 PM
Cloud cover
67%
7th clearest
Wind
9 km/h
11th windiest
Solar energy
3.93 kWh/m²
Travel score
5.6
out of 10

Oslo is capital city of Norway.

Air quality
Good
PM2.5 7.5 µg/m³ · 2019
Density
39,933/km²
people per km²
Founded
1048

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 Oslo 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 16°C and 24°C. Set against its neighbours, August runs about 1°C cooler than July and about 5°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52112
62112
72112
82012
92012
102012
112012
122012
132012
142012
152012
162012
172011
181911
191911
201911
211911
221911
231911
241911
251810
261810
271810
281810
291810
301810
311710

How August really feels in Oslo

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.

Oslo 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-2° / -7°7210.910.56.40.0
Feb-1° / -7°528.58.48.70.0
Mar / -4°548.27.111.30.1
Apr / 559.13.314.12.0
May15° / 7711.40.816.74.3
Jun19° / 9512.3018.35.5
Jul21° / 12°10012.7017.75.9
Aug19° / 11°11214.2015.35.6
Sep15° / 8910.8012.64.3
Oct / 9411.71.49.81.6
Nov / -1°921267.20.0
Dec-1° / -5°7111.18.15.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 22% of August, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34159
44159
54159
64060
74060
83961
93961
104060
114060
124060
134060
144060
154159
164060
174060
184060
194060
204060
214060
224060
234060
244159
254159
264060
274060
283961
293961
304060
313961

Chance of precipitation in August

Any precipitation

Oslo gets around 112 mm of rain over 14.2 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 47% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
244
345
445
546
646
747
847
947
1046
1146
1246
1346
1445
1545
1645
1745
1844
1944
2044
2144
2244
2343
2443
2543
2642
2742
2841
2941
3040
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 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
158357
259347
359347
460337
561327
661327
763316
864306
964306
1066295
1166295
1267285
1369274
1469274
1570264
1670264
1770264
1872253
1972253
2073243
2173243
2274233
2375223
2476213
2577203
2679192
2781172
2882162
2984142
3085132
3186122

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 16 h 36 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 156 minutes over August. Sunrise moves from 4:05 AM to 5:17 AM, and sunset from 8:42 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.64:058:42
216.54:078:39
316.54:098:37
416.44:128:34
516.34:148:32
616.24:168:29
716.14:198:27
816.04:218:24
916.04:238:21
1015.94:268:19
1115.84:288:16
1215.74:318:13
1315.64:338:10
1415.54:358:08
1515.44:388:05
1615.44:408:02
1715.34:437:59
1815.24:457:56
1915.14:487:53
2015.04:507:50
2114.94:527:47
2214.84:557:45
2314.74:577:42
2414.65:007:39
2514.65:027:36
2614.55:057:33
2714.45:077:30
2814.35:097:27
2914.25:127:23
3014.15:147:20
3114.05:177:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.93 kWh/m².

For context, solar energy here swings from a low near 0.19 kWh/m² to a high of 5.56 kWh/m² in June across the year — August's 3.93 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.1Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
313.2Moderate
Planning a trip in August

Is August a good time to visit Oslo?

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

5.6
Sightseeing
2nd-best month of the year
2.6
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Oslo for sightseeing.

What to pack for Oslo in August

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

In August, Oslo sees daytime highs around 19°C and nights near 11°C. Pack rain gear. About 14 days see rain.

rain gear

Sea temperature near Oslo 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 60 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°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr6Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug18Cool
Sep15Cool
Oct12Bracing
Nov9Bracing
Dec6Bracing

UV index in Oslo 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 Oslo peaks around July 15 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 15UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5Moderate
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Oslo?

Oslo sits at 59.9°N, 10.7°E, 26 m above sea level, in Norway. The nearest listed city is Lillestrøm, 18 km away.

Topography around Oslo

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

Within 3 km, the terrain around Oslo has only modest variations in elevation — a maximum elevation change of 169 m around an average of 41 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 535 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,381 m.

The land around Oslo is covered by artificial surfaces (47%), trees (29%) and water (21%) within 3 km, trees (63%) within 16 km, and trees (75%) within 80 km.

3 km
169 m
16 km
535 m
80 km
1,381 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Lillestrøm 18 km · Asker 19 km · Drammen 36 km · Moss 53 km · Horten 57 km · Kongsberg 67 km · Sarpsborg 73 km · Tønsberg 74 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 Oslo (59.9127°, 10.7461°, elevation 26 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).