Boo weather in August

In August, Boo sees average daytime highs of 19°C and overnight lows near 14°C, with 65 mm of rain across 11.5 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 20°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 30 min at the start of August to 14 hours by month's end. Set against the rest of the year, August is Boo's 5th-clearest and 10th-windiest month. For the whole year in context, see Boo's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
65 mm
11.5 wet days
Daylight
15 h 18 min
4:13 AM – 7:29 PM
Cloud cover
62%
5th clearest
Wind
14 km/h
10th windiest
Solar energy
4.42 kWh/m²
Travel score
5.9
out of 10

Boo is urban area in Nacka Municipality, Sweden.

Density
1,458/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 Boo reaches about 19°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°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)
12015
22015
32015
42015
52015
62015
72015
82015
92015
102015
112015
122015
132014
141914
151914
161914
171914
181914
191914
201914
211914
221914
231814
241813
251813
261813
271813
281813
291813
301813
311713

How August really feels in Boo

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.

Boo 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°398.86.26.60.0
Feb / -3°328.26.68.70.0
Mar / -1°307.94.611.30.0
Apr / 327.51.714.11.0
May12° / 398.30.116.63.2
Jun16° / 11°6110.3018.15.0
Jul19° / 14°6110017.56.2
Aug19° / 14°6511.5015.35.9
Sep15° / 10°518.7012.64.5
Oct10° / 5410.50.29.82.0
Nov / 5411.337.30.2
Dec / -1°5111.45.55.90.0

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 21% of August, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25050
35050
45050
54852
64852
74852
84555
94555
104456
114456
124357
134357
144258
154258
164258
174258
184258
194258
204159
214159
224060
234060
244060
254060
264060
274159
284159
294159
304159
314159

Chance of precipitation in August

Any precipitation

Boo gets around 65 mm of rain over 11.5 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 37% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
234
334
435
535
636
736
836
937
1037
1137
1237
1337
1437
1537
1637
1737
1838
1938
2038
2138
2238
2337
2437
2537
2637
2737
2837
2937
3036
3136

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13046195
23046195
33046185
43146185
53246185
63346174
73445174
83545164
93545163
103645163
113744163
123844152
134043152
144143152
154242142
164342141
174441141
184540141
194639131
204839131
214938131
225037121
235236120
245435110
255534110
265733100
27593290
28603190
29623080
30642970
31652870

Wind in August

Winds average 14 km/h in August.

Across August, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2816light breeze
2916light breeze
3016light breeze
3116light 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 3:38 AM to 4:48 AM, and sunset from 8:08 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
116.53:388:08
216.43:408:06
316.33:428:03
416.33:458:01
516.23:477:58
616.13:497:56
716.03:527:53
815.93:547:51
915.93:567:48
1015.83:597:45
1115.74:017:43
1215.64:037:40
1315.54:067:38
1415.44:087:35
1515.44:107:32
1615.34:137:29
1715.24:157:27
1815.14:177:24
1915.04:207:21
2014.94:227:18
2114.84:247:15
2214.84:277:12
2314.74:297:09
2414.64:317:07
2514.54:347:04
2614.44:367:01
2714.34:396:58
2814.24:416:55
2914.14:436:52
3014.14:466:49
3114.04:486:46

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.42 kWh/m².

For context, solar energy here swings from a low near 0.21 kWh/m² to a high of 5.98 kWh/m² in June across the year — August's 4.42 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.6Moderate
313.6Moderate
Planning a trip in August

Is August a good time to visit Boo?

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

August is a reasonable time to visit Boo for sightseeing.

What to pack for Boo in August

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

In August, Boo sees daytime highs around 19°C and nights near 14°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Boo in August

The nearest coast averages about 17°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 24 km away) is warmest in August at about 17°C and coldest in March near 2°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
Jan3Bracing
Feb2Bracing
Mar2Bracing
Apr3Bracing
May7Bracing
Jun12Bracing
Jul16Cool
Aug17Cool
Sep14Bracing
Oct10Bracing
Nov7Bracing
Dec5Bracing

UV index in Boo 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 Boo peaks around June 17 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateModerateLowJun 17UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5Moderate
Aug4Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Boo?

Boo sits at 59.3°N, 18.3°E, 37 m above sea level, in Sweden. The nearest listed city is Gustavsberg, 6.0 km away.

Topography around Boo

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

Within 3 km, the terrain around Boo has only modest variations in elevation — a maximum elevation change of 73 m around an average of 29 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 100 m; within 80 km, only modest variations in elevation — a maximum elevation change of 109 m.

The land around Boo is covered by trees (68%) within 3 km, trees (54%) and water (30%) within 16 km, and water (46%) and trees (39%) within 80 km.

3 km
73 m
16 km
100 m
80 km
109 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Gustavsberg 6.0 km · Nacka 7.0 km · Lidingö 9.0 km · Östermalm 11 km · Södermalm 12 km · Stockholm 12 km · Kungsholmen 14 km · Årsta 14 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 Boo (59.3333°, 18.2833°, elevation 37 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).