Hirokawa weather in August

In August, Hirokawa sees average daytime highs of 31°C and overnight lows near 24°C, with 175 mm of rain across 14.3 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 29% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Hirokawa's 6th-clearest and 11th-windiest month. For the whole year in context, see Hirokawa's year-round climate.

Daytime high
31°
1st warmest
Overnight low
24°
12th coldest
Rainfall
175 mm
14.3 wet days
Daylight
13 h 12 min
5:45 AM – 6:59 PM
Cloud cover
63%
6th clearest
Wind
7 km/h
11th windiest
Solar energy
4.83 kWh/m²
Travel score
4.0
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical August day in Hirokawa reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243123
253123
263123
273023
283023
293023
303023
313023

How August really feels in Hirokawa

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Hirokawa weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 6180.7102.3
Feb11° / 808.60.410.82.8
Mar15° / 12811.30.111.74.3
Apr20° / 10°14711.3012.85.9
May24° / 15°17011013.76.6
Jun26° / 19°37216.6014.25.3
Jul30° / 23°33417.50144.2
Aug31° / 24°17514.3013.24.0
Sep28° / 20°18012012.25.7
Oct23° / 14°1067.8011.27.3
Nov18° / 898.1010.35.9
Dec12° / 707.50.19.83.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34852
44951
54852
64852
74753
84654
94654
104654
114654
124555
134456
144456
154456
164456
174456
184555
194654
204555
214654
224753
234654
244654
254654
264654
274654
284654
294654
304654
314753

Chance of precipitation in August

Any precipitation

Hirokawa gets around 175 mm of rain over 14.3 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 47% and peaks near 50% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
243
343
443
543
643
743
844
944
1045
1145
1246
1347
1448
1548
1649
1749
1849
1950
2050
2150
2250
2350
2450
2549
2649
2749
2849
2949
3048
3148

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1045739
2045739
3045739
4035839
5035839
6035839
7035839
8045739
9045739
10045739
11045739
12055639
13055639
14065638
15065638
16075637
17185536
18195535
191105534
201115533
212125531
222135629
233145528
243155626
254165624
264185622
275195620
285205718
296215716
307235515
317245613

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 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
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 42 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:34 AM to 5:55 AM, and sunset from 7:14 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:347:14
213.65:357:13
313.65:357:12
413.65:367:11
513.65:377:10
613.55:387:09
713.55:387:08
813.55:397:07
913.45:407:07
1013.45:407:06
1113.45:417:04
1213.45:427:03
1313.35:437:02
1413.35:437:01
1513.35:447:00
1613.25:456:59
1713.25:456:58
1813.25:466:57
1913.15:476:56
2013.15:476:54
2113.15:486:53
2213.15:496:52
2313.05:506:51
2413.05:506:50
2513.05:516:48
2612.95:526:47
2712.95:526:46
2812.95:536:44
2912.85:546:43
3012.85:546:42
3112.85:556:41

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.83 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.24 kWh/m² in May across the year — August's 4.83 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.4Bright
Planning a trip in August

Hazard calendar for Hirokawa

In seasonPeak

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

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

Hirokawa's rainy season runs May–September, 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 Hirokawa?

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

4.0
Sightseeing
9th-best month of the year
5.9
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Hirokawa for sightseeing.

What to pack for Hirokawa in August

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

In August, Hirokawa sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Hirokawa in August

The nearest coast averages about 27°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 21 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Hirokawa 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 Hirokawa peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Hirokawa 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 Hirokawa is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Hirokawa?

Hirokawa sits at 33.2°N, 130.6°E, 41 m above sea level, in Japan. The nearest listed city is Chikugo, 7.0 km away.

Topography around Hirokawa

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

Within 3 km, the terrain around Hirokawa has only modest variations in elevation — a maximum elevation change of 217 m around an average of 53 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 750 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.

The land around Hirokawa is covered by trees (41%) and artificial surfaces (36%) within 3 km, trees (43%), cropland (29%) and artificial surfaces (23%) within 16 km, and trees (53%) and water (25%) within 80 km.

3 km
217 m
16 km
750 m
80 km
1,765 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Chikugo 7.0 km · Kurume 9.0 km · Yame 9.0 km · Setakamachi-takayanagi 13 km · Nakatsukuma 14 km · Tosu 14 km · Miyama 14 km · Ogōri 16 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 Hirokawa (33.2429°, 130.5521°, elevation 41 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).