Ashibetsu weather in August

In August, Ashibetsu sees average daytime highs of 24°C and overnight lows near 17°C, with 176 mm of rain across 14.8 wet days and about 13.8 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 23°C by the end. The sky is clear or mostly clear about 14% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Ashibetsu's 9th-clearest and 12th-windiest month. For the whole year in context, see Ashibetsu's year-round climate.

Daytime high
24°
1st warmest
Overnight low
17°
12th coldest
Rainfall
176 mm
14.8 wet days
Daylight
13 h 48 min
4:41 AM – 6:30 PM
Cloud cover
73%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.09 kWh/m²
Travel score
5.9
out of 10

Ashibetsu is city in Hokkaidō, Japan.

Density
22/km²
people per km²
Founded
1953

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 24°C in the first days to 23°C by the end.

A typical August day in Ashibetsu reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°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)
12418
22418
32418
42418
52418
62417
72417
82417
92417
102417
112417
122417
132417
142417
152417
162417
172417
182417
192316
202316
212316
222316
232316
242316
252316
262316
272315
282315
292315
302315
312315

How August really feels in Ashibetsu

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.

Ashibetsu 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-5° / -12°6716.220.59.10.0
Feb-3° / -11°5614.317.910.20.0
Mar / -7°7515.616.611.60.0
Apr / 8014.17.413.21.6
May16° / 9413.30.614.54.4
Jun19° / 12°8812.4015.25.6
Jul23° / 16°14214.8014.95.9
Aug24° / 17°17614.8013.85.9
Sep20° / 11°14414.4012.35.4
Oct13° / 11915.71.510.83.2
Nov / -3°11318.713.49.50.4
Dec-2° / -9°9218.722.18.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
32872
42872
52872
62872
72872
82872
92971
102971
112872
122872
132773
142773
152773
162773
172773
182872
192872
202872
212872
222872
232872
243070
253070
263070
273169
283169
293367
303367
313367

Chance of precipitation in August

Any precipitation

Ashibetsu gets around 176 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 49% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
149
248
348
448
548
648
748
848
948
1048
1148
1248
1348
1449
1549
1649
1749
1849
1949
2049
2148
2248
2348
2448
2548
2648
2748
2848
2949
3049
3149

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
161933365
261933366
361934366
461934356
561935356
661935346
761936336
861937326
962038316
1062038305
1162139295
1262140295
1362140285
1462141274
1572241264
1672241264
1782341253
1892341243
1992441243
20102540232
21112640222
22122639212
23132738212
24132837201
25142936191
26152935191
27163034181
28173133171
29193232171
30203331161
31213430151

Wind in August

Winds average 7 km/h in August, the calmest month.

Across August, daily wind ranges from about 7 km/h on the calmest days to 7 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
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:24 AM to 4:58 AM, and sunset from 6:50 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:246:50
214.44:266:49
314.44:276:48
414.34:286:47
514.34:296:45
614.24:306:44
714.24:316:43
814.24:326:41
914.14:336:40
1014.14:346:38
1114.04:356:37
1214.04:376:36
1313.94:386:34
1413.94:396:33
1513.94:406:31
1613.84:416:30
1713.84:426:28
1813.74:436:26
1913.74:456:25
2013.64:466:23
2113.64:476:22
2213.54:486:20
2313.54:496:18
2413.44:506:16
2513.44:516:15
2613.34:536:13
2713.34:546:11
2813.24:556:10
2913.24:566:08
3013.14:576:06
3113.14:586:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.09 kWh/m².

For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 5.25 kWh/m² in May across the year — August's 4.09 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.1Bright
154.0Bright
164.0Bright
174.0Bright
184.0Moderate
194.0Moderate
204.0Moderate
214.0Moderate
224.0Moderate
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
313.9Moderate
Planning a trip in August

Is August a good time to visit Ashibetsu?

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

5.9
Sightseeing
1st-best month of the year
4.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Ashibetsu for sightseeing.

What to pack for Ashibetsu in August

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

In August, Ashibetsu sees daytime highs around 24°C and nights near 17°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Ashibetsu in August

The nearest coast averages about 21°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 61 km away) is warmest in August at about 21°C and coldest in February near 5°C.

It's comfortable for a long swim from Aug 3 to Sep 20 — about 1.6 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan6Bracing
Feb5Bracing
Mar5Bracing
Apr7Bracing
May10Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep21Refreshing
Oct17Cool
Nov13Bracing
Dec9Bracing

UV index in Ashibetsu in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ashibetsu peaks around August 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 17UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7Very high
Jun7High
Jul6High
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Ashibetsu 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 Ashibetsu is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1517 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May15Moderate
Jun11Good
Jul11Good
Aug9Good
Sep8Good
Oct9Good
Nov9Good
Dec7Good
Location & terrain

Where is Ashibetsu?

Ashibetsu sits at 43.5°N, 142.2°E, 111 m above sea level, in Japan. The nearest listed city is Sunagawa, 23 km away.

Topography around Ashibetsu

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

Within 3 km, the terrain around Ashibetsu has significant variations in elevation — a maximum elevation change of 328 m around an average of 154 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 883 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,253 m.

The land around Ashibetsu is covered by trees (71%) within 3 km, trees (90%) within 16 km, and trees (73%) within 80 km.

3 km
328 m
16 km
883 m
80 km
2,253 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Sunagawa 23 km · Takikawa 23 km · Shimo-furano 24 km · Furano 24 km · Fukagawa 25 km · Asahikawa 32 km · Bibai 33 km · Iwamizawa 49 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 Ashibetsu (43.5097°, 142.1856°, elevation 111 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. 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).