Imaichi weather in August

In August, Imaichi sees average daytime highs of 27°C and overnight lows near 20°C, with 285 mm of rain across 23.9 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 26°C by the end. The sky is clear or mostly clear about 12% 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 Imaichi's 10th-clearest and 11th-windiest month. For the whole year in context, see Imaichi's year-round climate.

Daytime high
27°
1st warmest
Overnight low
20°
12th coldest
Rainfall
285 mm
23.9 wet days
Daylight
13 h 24 min
5:03 AM – 6:28 PM
Cloud cover
73%
10th clearest
Wind
5 km/h
11th windiest
Solar energy
4.41 kWh/m²
Travel score
4.4
out of 10

Imaichi 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 27°C in the first days to 26°C by the end.

A typical August day in Imaichi reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°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)
12721
22721
32721
42821
52821
62821
72821
82721
92721
102721
112721
122721
132721
142721
152721
162720
172720
182720
192720
202720
212720
222620
232620
242620
252620
262620
272620
282620
292619
302619
312619

How August really feels in Imaichi

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.

Imaichi weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°618.58.39.80.0
Feb / -3°598.97.110.60.1
Mar / -0°12214.27.611.71.5
Apr14° / 15215.12.112.93.7
May19° / 10°19717.40.113.95.0
Jun22° / 15°25521.8014.54.5
Jul26° / 19°34325.8014.34.2
Aug27° / 20°28523.9013.44.4
Sep23° / 17°29020.3012.24.9
Oct18° / 10°22017.50.111.14.7
Nov12° / 95100.4103.3
Dec / -1°6195.19.50.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
43070
52971
63070
73070
82971
93070
102971
112971
122971
132773
142773
152773
162773
172674
182773
192773
202773
212773
222773
232872
242872
252872
262971
272971
282971
292971
302971
312971

Chance of precipitation in August

Any precipitation

Imaichi gets around 285 mm of rain over 23.9 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 77% and peaks near 78% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
176
276
376
476
577
677
777
878
978
1078
1178
1278
1378
1478
1578
1678
1778
1878
1978
2077
2177
2277
2376
2476
2575
2675
2775
2874
2974
3073
3173

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
102114543
202104543
301104444
401104444
501114444
601114444
701114444
801114444
901114443
1001114543
1101114542
1202114641
1312114640
1412124739
1512124738
1613124837
1713134835
1813134934
1914144932
2014154931
2115164929
2215174928
2315185026
2415205025
2515215023
2616225021
2706245020
2806255118
2906265117
3007285016
3107295014

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 4:50 AM to 5:15 AM, and sunset from 6:44 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:506:44
213.94:516:43
313.84:526:42
413.84:536:41
513.84:546:40
613.74:556:39
713.74:556:38
813.74:566:37
913.64:576:36
1013.64:586:35
1113.64:596:34
1213.65:006:33
1313.55:006:31
1413.55:016:30
1513.45:026:29
1613.45:036:28
1713.45:046:27
1813.35:056:25
1913.35:056:24
2013.35:066:23
2113.25:076:21
2213.25:086:20
2313.25:096:19
2413.15:106:17
2513.15:106:16
2613.15:116:14
2713.05:126:13
2813.05:136:12
2912.95:146:10
3012.95:156:09
3112.95:156:07

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.18 kWh/m² in May across the year — August's 4.41 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Moderate
314.0Moderate
Planning a trip in August

Hazard calendar for Imaichi

In seasonPeak

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

Imaichi's rainy season runs May–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Imaichi?

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

4.4
Sightseeing
5th-best month of the year
4.4
Beach & pool
1st-best month of the year

August is a reasonable time to visit Imaichi for sightseeing.

What to pack for Imaichi in August

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

In August, Imaichi sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 24 days see rain.

rain gearlight clothes

UV index in Imaichi 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 Imaichi peaks around July 18 at about 10 (very high) — 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 highModerateJul 18UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5High
Apr7High
May9Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Imaichi 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 Imaichi 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 1721 µg/m³Dec 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Imaichi?

Imaichi sits at 36.7°N, 139.7°E, 391 m above sea level, in Japan. The nearest listed city is Nikko, 7.0 km away.

Topography around Imaichi

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

Within 3 km, the terrain around Imaichi has significant variations in elevation — a maximum elevation change of 342 m around an average of 421 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,085 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,551 m.

The land around Imaichi is covered by trees (61%) within 3 km, trees (82%) within 16 km, and trees (70%) within 80 km.

3 km
342 m
16 km
2,085 m
80 km
2,551 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Nikko 7.0 km · Kanuma 19 km · Yaita 24 km · Utsunomiya 24 km · Ujiie 26 km · Sakura 27 km · Hōshakuji 28 km · Mibu 35 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 Imaichi (36.7167°, 139.6833°, elevation 391 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. 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).