Muikamachi weather in August

In August, Muikamachi sees average daytime highs of 26°C and overnight lows near 18°C, with 177 mm of rain across 18 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 18% of the time in August, and the air most often feels muggy.

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 Muikamachi's 3rd-clearest and 11th-windiest month. For the whole year in context, see Muikamachi's year-round climate.

Daytime high
26°
1st warmest
Overnight low
18°
12th coldest
Rainfall
177 mm
18 wet days
Daylight
13 h 24 min
5:06 AM – 6:32 PM
Cloud cover
67%
3rd clearest
Wind
5 km/h
11th windiest
Solar energy
4.87 kWh/m²
Travel score
5.5
out of 10

Muikamachi is dissolved municipality in Minamiuonuma district, Niigata prefecture, Japan.

Founded
1900

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 26°C in the first days to 24°C by the end.

A typical August day in Muikamachi reaches about 26°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142619
152619
162618
172618
182618
192618
202518
212518
222518
232518
242518
252518
262518
272518
282517
292517
302417
312417

How August really feels in Muikamachi

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.

Muikamachi weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°21325.225.49.70.0
Feb / -6°16720.820.610.60.0
Mar / -4°16821.118.311.70.1
Apr11° / 13416.76.212.92.1
May17° / 14515.20.6144.8
Jun21° / 13°17917.3014.55.0
Jul24° / 17°24921.1014.35.0
Aug26° / 18°17718013.45.5
Sep22° / 14°18816.3012.35.3
Oct16° / 17716.30.5114.1
Nov / 14418.27.4101.5
Dec / -5°19022.920.19.50.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33763
43763
53763
63763
73664
83763
93763
103763
113763
123763
133763
143763
153565
163664
173664
183664
193664
203664
213664
223664
233664
243664
253664
263664
273664
283664
293565
303565
313565

Chance of precipitation in August

Any precipitation

Muikamachi gets around 177 mm of rain over 18 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 58% and peaks near 61% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
154
254
354
454
554
654
755
855
955
1056
1156
1257
1357
1458
1559
1659
1760
1860
1960
2060
2161
2261
2361
2460
2560
2660
2760
2859
2959
3058
3158

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10527662
20526672
30526672
40526672
50526663
60526663
70526663
80526663
90527653
100527653
110528643
121628623
131629613
141629613
151630603
161730602
171731592
181832572
191932562
201933552
2121034522
2221135502
2321137492
2421238472
2521339451
2621440421
2721541401
2831642381
2931743361
3031844351
3131844331

Wind in August

Winds average 5 km/h in August.

Across August, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

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 4:53 AM to 5:18 AM, and sunset from 6:48 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:536:48
213.94:546:47
313.94:556:46
413.84:556:45
513.84:566:44
613.84:576:43
713.74:586:42
813.74:596:41
913.75:006:40
1013.65:006:39
1113.65:016:38
1213.65:026:36
1313.55:036:35
1413.55:046:34
1513.55:056:33
1613.45:066:32
1713.45:066:30
1813.45:076:29
1913.35:086:28
2013.35:096:26
2113.35:106:25
2213.25:116:24
2313.25:126:22
2413.15:126:21
2513.15:136:19
2613.15:146:18
2713.05:156:17
2813.05:166:15
2912.95:176:14
3012.95:186:12
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 4.87 kWh/m².

For context, solar energy here swings from a low near 2.07 kWh/m² to a high of 5.57 kWh/m² in May across the year — August's 4.87 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
105.1Bright
115.0Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
314.3Bright
Planning a trip in August

Hazard calendar for Muikamachi

In seasonPeak

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

Muikamachi 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 Muikamachi?

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

5.5
Sightseeing
1st-best month of the year
5.1
Beach & pool
1st-best month of the year

August is a reasonable time to visit Muikamachi for sightseeing.

What to pack for Muikamachi in August

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

In August, Muikamachi sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near Muikamachi 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 41 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 Muikamachi 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 Muikamachi peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateAug 12UV 10Dec 21UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Muikamachi 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 Muikamachi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug13Moderate
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Muikamachi?

Muikamachi sits at 37.1°N, 138.9°E, 162 m above sea level, in Japan. The nearest listed city is Minamiuonuma, 2.0 km away.

Topography around Muikamachi

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

Within 3 km, the terrain around Muikamachi has significant variations in elevation — a maximum elevation change of 461 m around an average of 231 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,862 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,551 m.

The land around Muikamachi is covered by trees (43%) and cropland (33%) within 3 km, trees (77%) within 16 km, and trees (75%) within 80 km.

3 km
461 m
16 km
1,862 m
80 km
2,551 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Minamiuonuma 2.0 km · Shiozawa 4.0 km · Tōkamachi 13 km · Uonuma 21 km · Ojiya 27 km · Nagaoka 43 km · Minakami 43 km · Kashiwazaki 45 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 Muikamachi (37.0667°, 138.8833°, elevation 162 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).