Tochio-honchō weather in August

In August, Tochio-honchō sees average daytime highs of 30°C and overnight lows near 22°C, with 169 mm of rain across 15.7 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 29°C by the end. The sky is clear or mostly clear about 24% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Tochio-honchō's 1st-clearest and 11th-windiest month. For the whole year in context, see Tochio-honchō's year-round climate.

Daytime high
30°
1st warmest
Overnight low
22°
12th coldest
Rainfall
169 mm
15.7 wet days
Daylight
13 h 30 min
5:05 AM – 6:32 PM
Cloud cover
63%
1st clearest
Wind
6 km/h
11th windiest
Solar energy
4.99 kWh/m²
Travel score
4.3
out of 10

Tochio-honchō is human settlement in Japan.

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 31°C in the first days to 29°C by the end.

A typical August day in Tochio-honchō reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 34°C. Set against its neighbours, August runs about 2°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123022
133022
143022
153022
163022
173022
183022
193022
203022
213021
223021
233021
242921
252921
262921
272921
282921
292921
302920
312920

How August really feels in Tochio-honchō

Once humidity and wind are folded in, August averages 22 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
22
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.

Tochio-honchō 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
Jan / -2°20525.720.79.70.0
Feb / -2°14921.517.210.60.1
Mar / 15020.810.611.71.3
Apr16° / 11615.31.312.94.3
May22° / 11°11613.10146.1
Jun25° / 16°14314.1014.55.8
Jul28° / 21°24417.7014.34.6
Aug30° / 22°16915.7013.44.3
Sep26° / 17°15615.1012.35.6
Oct20° / 11°15715.80115.4
Nov13° / 15318.51.3103.0
Dec / -0°2022412.89.50.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64258
74258
84357
94258
104258
114258
124258
134258
144357
154357
164258
174357
184357
194357
204357
214357
224357
234357
244357
254357
264159
274258
284258
294159
304258
314258

Chance of precipitation in August

Any precipitation

Tochio-honchō gets around 169 mm of rain over 15.7 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 50% and peaks near 53% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
144
244
345
445
546
646
747
848
948
1049
1150
1250
1351
1452
1552
1652
1753
1853
1953
2053
2153
2253
2353
2453
2553
2652
2752
2852
2952
3052
3152

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10425683
20424693
30424693
40425674
50425674
60425674
70426655
80426655
90426655
100426655
111526635
121527625
131527625
141527625
151628605
161628605
171629604
181730584
191730584
202831554
212832553
222933533
232934523
2421036503
2521137472
2621239452
2721340432
2821441402
2921543382
3031644362
3131745342

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 4:52 AM to 5:18 AM, and sunset from 6:49 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:526:49
213.94:526:48
313.94:536:47
413.94:546:46
513.84:556:45
613.84:566:44
713.84:576:42
813.74:586:41
913.74:586:40
1013.74:596:39
1113.65:006:38
1213.65:016:37
1313.65:026:35
1413.55:036:34
1513.55:046:33
1613.55:056:32
1713.45:056:30
1813.45:066:29
1913.35:076:28
2013.35:086:26
2113.35:096:25
2213.25:106:24
2313.25:116:22
2413.25:116:21
2513.15:126:19
2613.15:136:18
2713.05:146:17
2813.05:156:15
2913.05:166:14
3012.95:176:12
3112.95:186:11

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.99 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 5.54 kWh/m² in May across the year — August's 4.99 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.2Bright
95.2Bright
105.2Bright
115.1Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.9Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Tochio-honchō

In seasonPeak

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

Tochio-honchō sits in the Pacific typhoon belt; the season peaks July–October.

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

Is August a good time to visit Tochio-honchō?

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

4.3
Sightseeing
6th-best month of the year
5.9
Beach & pool
1st-best month of the year

August is a reasonable time to visit Tochio-honchō for sightseeing.

What to pack for Tochio-honchō in August

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

In August, Tochio-honchō sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Tochio-honchō 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 35 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 21 to Oct 31 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Tochio-honchō in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tochio-honchō peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Tochio-honchō 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 Tochio-honchō is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1723 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug14Moderate
Sep12Moderate
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Tochio-honchō?

Tochio-honchō sits at 37.5°N, 139.0°E, 65 m above sea level, in Japan. The nearest listed city is Mitsuke, 8.0 km away.

Topography around Tochio-honchō

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

Within 3 km, the terrain around Tochio-honchō has significant variations in elevation — a maximum elevation change of 255 m around an average of 119 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,514 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,323 m.

The land around Tochio-honchō is covered by trees (74%) within 3 km, trees (70%) within 16 km, and trees (59%) and water (28%) within 80 km.

3 km
255 m
16 km
1,514 m
80 km
2,323 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Mitsuke 8.0 km · Nagaoka 13 km · Sanjō 16 km · Kamo 21 km · Tsubame 22 km · Yoshida-kasugachō 25 km · Uonuma 26 km · Ojiya 26 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 Tochio-honchō (37.4764°, 138.9951°, elevation 65 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).