Nasukarasuyama weather in August

In August, Nasukarasuyama sees average daytime highs of 29°C and overnight lows near 22°C, with 141 mm of rain across 15.7 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 15% 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 Nasukarasuyama's 10th-clearest and 11th-windiest month. For the whole year in context, see Nasukarasuyama's year-round climate.

Daytime high
29°
1st warmest
Overnight low
22°
12th coldest
Rainfall
141 mm
15.7 wet days
Daylight
13 h 24 min
5:01 AM – 6:26 PM
Cloud cover
71%
10th clearest
Wind
6 km/h
11th windiest
Solar energy
4.49 kWh/m²
Travel score
4.5
out of 10

Nasukarasuyama is city in Tochigi Prefecture, Japan.

Density
143/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 30°C in the first days to 28°C by the end.

A typical August day in Nasukarasuyama reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53023
63023
73023
83023
93022
103022
113022
123022
133022
143022
153022
162922
172922
182922
192922
202922
212922
222922
232922
242922
252921
262921
272821
282821
292821
302821
312821

How August really feels in Nasukarasuyama

Once humidity and wind are folded in, August averages 16 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
16
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.

Nasukarasuyama weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°5262.99.80.9
Feb / -1°5272.910.61.3
Mar11° / 10011.72.911.72.8
Apr17° / 11412.10.712.95.0
May22° / 12°13212.6013.96.1
Jun25° / 17°14315.2014.55.6
Jul28° / 21°18618.2014.34.6
Aug29° / 22°14115.7013.44.5
Sep25° / 18°16714.5012.25.8
Oct20° / 12°16012.3011.15.9
Nov14° / 7980.1104.5
Dec / 5071.19.52.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33367
43268
53367
63367
73367
83367
93367
103367
113268
123268
133268
143268
153169
163169
173169
183169
193268
203268
213268
223268
233268
243268
253367
263367
273367
283367
293367
303367
313367

Chance of precipitation in August

Any precipitation

Nasukarasuyama gets around 141 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 51% and peaks near 52% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
150
250
350
450
550
650
751
851
951
1052
1152
1252
1352
1452
1552
1652
1752
1852
1951
2051
2150
2250
2350
2450
2550
2650
2750
2850
2950
3050
3150

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101720684
201719685
301719685
401719685
501819666
601819666
701818676
801819666
901819666
1001819666
1101820656
1201820656
1311821636
1411822626
1511823616
1612823606
1712824605
1812925585
1912926575
2013927564
21131027554
22131028544
23131129524
24131230513
25131231503
26141332483
27041432473
28041533453
29041634442
30051734422
31051835402

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 4:49 AM to 5:14 AM, and sunset from 6:42 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:496:42
213.94:496:41
313.84:506:40
413.84:516:39
513.84:526:38
613.74:536:37
713.74:546:36
813.74:546:35
913.64:556:34
1013.64:566:33
1113.64:576:32
1213.54:586:31
1313.54:596:29
1413.54:596:28
1513.45:006:27
1613.45:016:26
1713.45:026:25
1813.35:036:23
1913.35:046:22
2013.35:046:21
2113.25:056:19
2213.25:066:18
2313.25:076:17
2413.15:086:15
2513.15:096:14
2613.05:096:12
2713.05:106:11
2813.05:116:10
2912.95:126:08
3012.95:136:07
3112.95:146:05

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.49 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.2 kWh/m² in May across the year — August's 4.49 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.1Bright
294.1Bright
304.1Bright
314.0Bright
Planning a trip in August

Hazard calendar for Nasukarasuyama

In seasonPeak

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

Nasukarasuyama 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 Nasukarasuyama?

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

4.5
Sightseeing
7th-best month of the year
5.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Nasukarasuyama for sightseeing.

What to pack for Nasukarasuyama in August

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

In August, Nasukarasuyama sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. About 16 days see rain.

light clothesrain gear

Sea temperature near Nasukarasuyama in August

The nearest coast averages about 24°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 52 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Nasukarasuyama 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 Nasukarasuyama peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 17UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Low

Air quality in Nasukarasuyama 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 Nasukarasuyama is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Nasukarasuyama?

Nasukarasuyama sits at 36.7°N, 140.2°E, 89 m above sea level, in Japan. The nearest listed city is Karasuyama, 1.0 km away.

Topography around Nasukarasuyama

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

Within 3 km, the terrain around Nasukarasuyama has only modest variations in elevation — a maximum elevation change of 234 m around an average of 125 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 490 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,553 m.

The land around Nasukarasuyama is covered by trees (63%) within 3 km, trees (71%) within 16 km, and trees (58%) within 80 km.

3 km
234 m
16 km
490 m
80 km
2,553 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Karasuyama 1.0 km · Ogawa 11 km · Hōshakuji 16 km · Sakura 17 km · Ujiie 18 km · Daigo 21 km · Mashiko 21 km · Hitachiomiya 24 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 Nasukarasuyama (36.6523°, 140.1608°, elevation 89 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).