Imabari weather in August

In August, Imabari sees average daytime highs of 29°C and overnight lows near 24°C, with 142 mm of rain across 13.6 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 31% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Imabari's 6th-clearest and 11th-windiest month. For the whole year in context, see Imabari's year-round climate.

Daytime high
29°
1st warmest
Overnight low
24°
12th coldest
Rainfall
142 mm
13.6 wet days
Daylight
13 h 18 min
5:34 AM – 6:51 PM
Cloud cover
60%
6th clearest
Wind
8 km/h
11th windiest
Solar energy
5.37 kWh/m²
Travel score
5.2
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical August day in Imabari reaches about 29°C in the afternoon and slips back to 24°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, August runs about 1°C warmer than July and about 3°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152924
162924
172924
182924
192924
202924
212924
222924
232824
242824
252824
262824
272824
282824
292824
302823
312823

How August really feels in Imabari

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.

Imabari 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 / 6611.13.1101.2
Feb / 7810.63.110.71.5
Mar12° / 11812.3111.73.0
Apr16° / 11°13211.10.112.85.1
May21° / 15°15611.1013.76.2
Jun24° / 19°24914.8014.25.7
Jul27° / 23°22515.40145.3
Aug29° / 24°14213.6013.35.2
Sep26° / 21°19613.2012.26.2
Oct21° / 16°14810011.16.6
Nov16° / 11°829.2010.24.9
Dec10° / 79111.69.82.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% 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 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
35050
45050
55050
65050
75050
85050
95050
104951
114852
124852
134753
144753
154852
164852
174852
184852
194852
204951
214951
224951
234951
244951
254852
264852
274852
284852
294753
304852
314852

Chance of precipitation in August

Any precipitation

Imabari gets around 142 mm of rain over 13.6 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 44% and peaks near 47% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
142
242
342
442
542
642
742
842
942
1043
1143
1243
1344
1444
1544
1644
1744
1844
1945
2045
2145
2245
2345
2445
2546
2646
2746
2847
2947
3047
3147

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 77% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10068311
20058411
30058411
40048511
50048511
60048511
70048511
80048511
90048511
100058411
110158311
120168211
130168310
140178210
151178110
161188010
17119809
181111789
191212778
201213768
211214767
221315747
231317736
241418716
251419715
261520695
271522684
281623664
291625653
301726633
311728613

Wind in August

Winds average 8 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 42 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 54 minutes over August. Sunrise moves from 5:23 AM to 5:45 AM, and sunset from 7:06 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:237:06
213.75:237:05
313.75:247:04
413.65:257:03
513.65:267:02
613.65:267:01
713.65:277:00
813.55:286:59
913.55:286:58
1013.55:296:57
1113.45:306:56
1213.45:316:55
1313.45:316:54
1413.35:326:53
1513.35:336:52
1613.35:346:51
1713.25:346:49
1813.25:356:48
1913.25:366:47
2013.25:376:46
2113.15:376:45
2213.15:386:43
2313.15:396:42
2413.05:406:41
2513.05:406:39
2613.05:416:38
2712.95:426:37
2812.95:426:36
2912.85:436:34
3012.85:446:33
3112.85:456:31

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.37 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.67 kWh/m² in May across the year — August's 5.37 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for Imabari

In seasonPeak

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

Imabari 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 Imabari?

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

5.2
Sightseeing
6th-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Imabari in August

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

In August, Imabari sees daytime highs around 29°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Imabari in August

The nearest coast averages about 28°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 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 14 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct24Refreshing
Nov20Cool
Dec17Cool

UV index in Imabari 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 Imabari peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 12UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Imabari 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 Imabari is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1523 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Imabari?

Imabari sits at 34.1°N, 133.0°E, 6 m above sea level, in Japan. The nearest listed city is Hōjō, 23 km away.

Topography around Imabari

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

Within 3 km, the terrain around Imabari has only modest variations in elevation — a maximum elevation change of 236 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,030 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,900 m.

The land around Imabari is covered by artificial surfaces (43%) and water (38%) within 3 km, water (56%) and trees (33%) within 16 km, and trees (59%) and water (32%) within 80 km.

3 km
236 m
16 km
1,030 m
80 km
1,900 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Hōjō 23 km · Saijō 24 km · Innoshima 29 km · Niihama 31 km · Takehara 31 km · Tōon 32 km · Matsuyama 34 km · Mihara 37 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 Imabari (34.07°, 133.0002°, elevation 6 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).