Tainai weather in August

In August, Tainai sees average daytime highs of 29°C and overnight lows near 21°C, with 215 mm of rain across 17.2 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 28°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 14 hours at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Tainai's 1st-clearest and 11th-windiest month. For the whole year in context, see Tainai's year-round climate.

Daytime high
29°
1st warmest
Overnight low
21°
12th coldest
Rainfall
215 mm
17.2 wet days
Daylight
13 h 30 min
5:02 AM – 6:31 PM
Cloud cover
64%
1st clearest
Wind
6 km/h
11th windiest
Solar energy
4.85 kWh/m²
Travel score
4.8
out of 10

Tainai is city in Niigata Prefecture, Japan.

Density
108/km²
people per km²
Founded
2005

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 29°C in the first days to 28°C by the end.

A typical August day in Tainai reaches about 29°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°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)
12922
22922
32922
42922
52922
62922
72922
82922
92922
102922
112922
122922
132922
142922
152922
162922
172921
182921
192921
202821
212821
222821
232821
242821
252821
262821
272820
282820
292820
302720
312720

How August really feels in Tainai

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.

Tainai 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°22126.324.29.70.0
Feb / -2°15822.119.910.50.0
Mar / -0°16521.113.411.70.8
Apr14° / 13416.12.6133.5
May20° / 11°14314.40145.6
Jun24° / 16°18614.8014.65.8
Jul27° / 20°31519.5014.44.8
Aug29° / 21°21517.2013.54.8
Sep25° / 17°16715012.35.7
Oct18° / 11°168160115.0
Nov12° / 18119.339.92.4
Dec / -0°22725.316.89.40.3

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 (%)
13763
23763
33862
43961
53961
64060
74060
84159
94060
104060
114060
124159
134159
144159
154159
164159
174258
184357
194357
204456
214357
224456
234555
244555
254555
264357
274357
284456
294456
304357
314357

Chance of precipitation in August

Any precipitation

Tainai gets around 215 mm of rain over 17.2 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 55% and peaks near 58% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
153
253
353
453
552
652
752
853
953
1053
1154
1254
1355
1455
1556
1656
1757
1857
1957
2058
2158
2258
2358
2458
2557
2657
2757
2856
2956
3055
3155

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 86% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11830601
21829611
31829611
41828621
51828621
61828621
71828621
81828621
91929601
101929601
111929601
122930581
132931571
142931571
152932561
163932551
173933541
183933541
1941034511
2041034511
2141134491
2241235471
2341336461
2441437441
2551538411
2651638391
2751839371
2851940351
2952041331
3052241311
3152342291

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 7 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
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 hours 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 66 minutes over August. Sunrise moves from 4:49 AM to 5:15 AM, and sunset from 6:48 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:496:48
214.04:506:47
313.94:506:46
413.94:516:45
513.94:526:44
613.84:536:43
713.84:546:42
813.84:556:41
913.74:566:40
1013.74:576:39
1113.74:576:37
1213.64:586:36
1313.64:596:35
1413.65:006:34
1513.55:016:32
1613.55:026:31
1713.45:036:30
1813.45:046:28
1913.45:056:27
2013.35:056:26
2113.35:066:24
2213.35:076:23
2313.25:086:21
2413.25:096:20
2513.15:106:19
2613.15:116:17
2713.15:126:16
2813.05:136:14
2913.05:146:13
3012.95:146:11
3112.95:156:10

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.85 kWh/m².

For context, solar energy here swings from a low near 1.68 kWh/m² to a high of 5.51 kWh/m² in May across the year — August's 4.85 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in August

Hazard calendar for Tainai

In seasonPeak

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

Tainai 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 Tainai?

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

4.8
Sightseeing
5th-best month of the year
5.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Tainai for sightseeing.

What to pack for Tainai in August

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

In August, Tainai sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Tainai in August

The nearest coast averages about 26°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 21 to Oct 29 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar9Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Bracing

UV index in Tainai 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 Tainai 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 (moderate).

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
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Tainai 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 Tainai is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1421 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun15Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Tainai?

Tainai sits at 38.1°N, 139.4°E, 48 m above sea level, in Japan. The nearest listed city is Shibata, 14 km away.

Topography around Tainai

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

Within 3 km, the terrain around Tainai has significant variations in elevation — a maximum elevation change of 325 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 938 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,110 m.

The land around Tainai is covered by cropland (46%), trees (26%) and artificial surfaces (24%) within 3 km, trees (41%), water (28%) and cropland (20%) within 16 km, and trees (52%) and water (35%) within 80 km.

3 km
325 m
16 km
938 m
80 km
2,110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Shibata 14 km · Murakami 20 km · Suibara 29 km · Agano 30 km · Kameda-honchō 34 km · Niigata 36 km · Niitsu-honchō 38 km · Gosen 42 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 Tainai (38.0646°, 139.4056°, elevation 48 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).