Hakodate weather in August

In August, Hakodate sees average daytime highs of 22°C and overnight lows near 20°C, with 206 mm of rain across 14.8 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 21% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Hakodate's 11th-clearest and 10th-windiest month. For the whole year in context, see Hakodate's year-round climate.

Daytime high
22°
1st warmest
Overnight low
20°
12th coldest
Rainfall
206 mm
14.8 wet days
Daylight
13 h 42 min
4:50 AM – 6:32 PM
Cloud cover
69%
11th clearest
Wind
14 km/h
10th windiest
Solar energy
4.24 kWh/m²
Travel score
5.8
out of 10

Hakodate is city in Hokkaido, Japan.

Density
407/km²
people per km²
Founded
1922

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical August day in Hakodate reaches about 22°C in the afternoon and slips back to 20°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, August runs about 3°C warmer than July and about 2°C warmer than September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12220
22220
32220
42220
52220
62220
72220
82220
92220
102220
112220
122320
132320
142320
152320
162320
172220
182220
192220
202220
212220
222220
232220
242220
252220
262220
272220
282220
292220
302220
312220

How August really feels in Hakodate

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.

Hakodate weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -4°529.29.39.30.0
Feb-0° / -4°527.97.210.30.0
Mar / -1°669.65.911.70.0
Apr / 839.81.313.10.7
May11° / 11911.6014.32.8
Jun16° / 13°12111.60154.6
Jul20° / 17°17814.9014.75.4
Aug22° / 20°20614.8013.75.8
Sep21° / 18°18512.8012.35.8
Oct14° / 11°11411.4010.94.2
Nov / 87111.69.61.0
Dec / -1°7110.57.590.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 13% of August, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33268
43268
53367
63466
73367
83367
93367
103367
113169
123169
133169
143268
153367
163466
173466
183466
193664
203664
213664
223664
233862
243862
253862
263862
273862
283961
293961
303862
313862

Chance of precipitation in August

Any precipitation

Hakodate gets around 206 mm of rain over 14.8 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 48% and peaks near 51% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
145
245
345
445
545
646
746
847
947
1048
1149
1249
1350
1450
1551
1651
1751
1851
1950
2050
2150
2250
2349
2449
2549
2649
2748
2848
2948
3048
3148

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1110254123
219244124
319244125
419244126
518244027
618244027
718244027
818244027
917254027
1017264026
1117264026
1227274025
1326274025
1426284024
1526294023
1627294022
1727294021
1827304020
1928304020
2029304019
2129304018
22210314017
23210314016
24310323916
25311323915
26311333914
27312333814
28313343713
29314353613
30314353512
31315363412

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 15 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
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:35 AM to 5:06 AM, and sunset from 6:52 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:356:52
214.24:366:50
314.24:376:49
414.24:386:48
514.14:396:47
614.14:406:46
714.14:416:44
814.04:426:43
914.04:436:42
1013.94:446:41
1113.94:456:39
1213.94:466:38
1313.84:476:36
1413.84:486:35
1513.74:496:34
1613.74:506:32
1713.74:516:31
1813.64:526:29
1913.64:536:28
2013.54:546:26
2113.54:566:24
2213.44:576:23
2313.44:586:21
2413.44:596:20
2513.35:006:18
2613.35:016:16
2713.25:026:15
2813.25:036:13
2913.15:046:11
3013.15:056:10
3113.05:066:08

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.24 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 5.44 kWh/m² in May across the year — August's 4.24 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
314.0Bright
Planning a trip in August

Hazard calendar for Hakodate

In seasonPeak

In August, Hakodate sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Hakodate sits in the Pacific typhoon belt; the season peaks July–October.

Hakodate's rainy season runs May–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Hakodate?

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

5.8
Sightseeing
1st-best month of the year
4.2
Beach & pool
1st-best month of the year

August is a reasonable time to visit Hakodate for sightseeing.

What to pack for Hakodate in August

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

In August, Hakodate sees daytime highs around 22°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Hakodate in August

The nearest coast averages about 23°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 19 km away) is warmest in August at about 23°C and coldest in February near 8°C.

It's comfortable for a long swim from Jul 26 to Oct 7 — about 2.4 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun15Bracing
Jul19Cool
Aug23Refreshing
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec13Bracing

UV index in Hakodate in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hakodate peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May8Very high
Jun7Very high
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Hakodate in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Hakodate is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1216 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May14Moderate
Jun9Good
Jul8Good
Aug8Good
Sep8Good
Oct9Good
Nov8Good
Dec6Good
Location & terrain

Where is Hakodate?

Hakodate sits at 41.8°N, 140.7°E, 5 m above sea level, in Japan. The nearest listed city is Kamiiso, 9.0 km away.

Topography around Hakodate

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

Within 3 km, the terrain around Hakodate has significant variations in elevation — a maximum elevation change of 292 m around an average of 9 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 928 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,254 m.

The land around Hakodate is covered by artificial surfaces (49%) and water (44%) within 3 km, water (48%) and trees (32%) within 16 km, and water (64%) and trees (32%) within 80 km.

3 km
292 m
16 km
928 m
80 km
1,254 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Kamiiso 9.0 km · Hokuto 10 km · Honchō 14 km · Muroran 64 km · Yakumo 66 km · Mutsu 67 km · Date 78 km · Noboribetsu 84 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Hakodate (41.7758°, 140.7367°, elevation 5 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).