Choshi weather in August

In August, Choshi sees average daytime highs of 28°C and overnight lows near 24°C, with 88 mm of rain across 9.9 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 30% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Choshi's 5th-clearest and 12th-windiest month. For the whole year in context, see Choshi's year-round climate.

Daytime high
28°
1st warmest
Overnight low
24°
12th coldest
Rainfall
88 mm
9.9 wet days
Daylight
13 h 24 min
5:00 AM – 6:22 PM
Cloud cover
60%
5th clearest
Wind
15 km/h
12th windiest
Solar energy
5.52 kWh/m²
Travel score
6.3
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical August day in Choshi reaches about 28°C in the afternoon and slips back to 24°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 30°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12824
22824
32824
42824
52824
62824
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172824
182824
192824
202824
212824
222824
232824
242824
252824
262724
272724
282724
292724
302724
312724

Choshi weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 949.39.92.2
Feb10° / 879.610.62.2
Mar12° / 14213.711.73.1
Apr16° / 12°11912.612.94.8
May20° / 16°13411.913.95.9
Jun23° / 20°16512.914.45.9
Jul26° / 23°1331214.26.2
Aug28° / 24°889.913.46.3
Sep25° / 22°17013.112.26.1
Oct21° / 18°22613.911.15.9
Nov17° / 13°12211.810.15.1
Dec12° / 91109.63.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24456
34456
44357
54555
64555
74555
84654
94555
104555
114555
124555
134555
144456
154456
164456
174555
184555
194555
204654
214654
224555
234654
244654
254654
264654
274753
284753
294654
304753
314753

Chance of precipitation in August

Any precipitation

Choshi gets around 88 mm of rain over 9.9 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 32% and peaks near 39% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
128
227
327
427
528
628
728
829
929
1029
1130
1231
1331
1432
1532
1633
1733
1833
1934
2034
2134
2235
2335
2436
2536
2636
2737
2837
2938
3038
3139

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 48% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
104104937
204104838
304104839
40494839
50494740
60494740
70394740
803104641
903104641
1003104640
1103104640
1203114640
1303114639
1403114639
1513114739
1613114738
1713124738
1813124737
1914124737
2014124736
2114124835
2214134834
2314134834
2414134933
2514144932
2614155031
2714155030
2814165029
2914175028
3014185126
3115195025

Wind in August

Winds average 15 km/h in August, the calmest month.

Across August, daily wind ranges from about 15 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
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 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 60 minutes over August. Sunrise moves from 4:48 AM to 5:12 AM, and sunset from 6:38 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:486:38
213.84:496:37
313.84:496:36
413.74:506:35
513.74:516:34
613.74:526:33
713.74:536:32
813.64:536:31
913.64:546:30
1013.64:556:29
1113.54:566:27
1213.54:576:26
1313.54:576:25
1413.44:586:24
1513.44:596:23
1613.45:006:22
1713.35:016:20
1813.35:016:19
1913.35:026:18
2013.25:036:17
2113.25:046:15
2213.25:056:14
2313.15:056:13
2413.15:066:11
2513.05:076:10
2613.05:086:09
2713.05:096:07
2812.95:096:06
2912.95:106:04
3012.95:116:03
3112.85:126:02

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.52 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.54 kWh/m² in May across the year — August's 5.52 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in August

Hazard calendar for Choshi

In seasonPeak

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

Choshi 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 Choshi?

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

6.3
Sightseeing
1st-best month of the year
6.7
Beach & pool
1st-best month of the year

August is a reasonable time to visit Choshi for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Choshi in August

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

In August, Choshi sees daytime highs around 28°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Choshi in August

The nearest coast averages about 25°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 13 km away) is warmest in August at about 25°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 5 to Nov 22 — about 5.6 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr16Cool
May19Cool
Jun21Refreshing
Jul23Refreshing
Aug25Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Choshi 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 Choshi peaks around August 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Choshi 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 Choshi is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1920 µg/m³Dec 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar18Moderate
Apr20Moderate
May19Moderate
Jun14Moderate
Jul12Good
Aug11Good
Sep10Good
Oct10Good
Nov9Good
Dec7Good
Location & terrain

Where is Choshi?

Choshi sits at 35.7°N, 140.8°E, 5 m above sea level, in Japan. The nearest listed city is Hasaki, 0.0 km away.

Topography around Choshi

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

Within 3 km, the terrain around Choshi has only modest variations in elevation — a maximum elevation change of 53 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 76 m; within 80 km, significant variations in elevation — a maximum elevation change of 452 m.

The land around Choshi is covered by artificial surfaces (37%) and water (31%) within 3 km, water (75%) within 16 km, and water (48%) and trees (23%) within 80 km.

3 km
53 m
16 km
76 m
80 km
452 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Hasaki 0.0 km · Asahi 17 km · Omigawa 23 km · Kamisu 24 km · Sōsa 25 km · Yōkaichiba 26 km · Kashima-shi 31 km · Yokoshiba 33 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 Choshi (35.7333°, 140.8333°, 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).