Kesennuma weather in August

In August, Kesennuma sees average daytime highs of 26°C and overnight lows near 21°C, with 154 mm of rain across 14.2 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 16% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Kesennuma's 10th-clearest and 11th-windiest month. For the whole year in context, see Kesennuma's year-round climate.

Daytime high
26°
1st warmest
Overnight low
21°
12th coldest
Rainfall
154 mm
14.2 wet days
Daylight
13 h 30 min
4:52 AM – 6:24 PM
Cloud cover
73%
10th clearest
Wind
8 km/h
11th windiest
Solar energy
4.53 kWh/m²
Travel score
5.8
out of 10

Kesennuma is city in Miyagi Prefecture, Japan.

Density
184/km²
people per km²
Founded
1953

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical August day in Kesennuma reaches about 26°C in the afternoon and slips back to 21°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12621
22621
32621
42621
52621
62621
72621
82621
92621
102621
112621
122621
132621
142621
152621
162621
172621
182621
192621
202621
212620
222620
232620
242620
252620
262520
272520
282520
292520
302520
312520

How August really feels in Kesennuma

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.

Kesennuma 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 / -2°497.24.89.60.0
Feb / -2°457.44.910.50.0
Mar / 9210.84.411.71.2
Apr13° / 10011.21.1133.5
May18° / 11°11611.7014.15.3
Jun21° / 15°12612.1014.75.7
Jul24° / 19°16415.6014.45.7
Aug26° / 21°15414.2013.55.8
Sep23° / 17°17113.7012.35.9
Oct18° / 11°14010.40115.6
Nov12° / 708.60.39.93.3
Dec / 598.93.29.30.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32773
42773
52773
62773
72773
82773
92872
102872
112773
122773
132773
142773
152773
162971
172872
182872
192872
202971
212971
222971
233070
243070
253169
263070
273169
283169
293169
303169
313169

Chance of precipitation in August

Any precipitation

Kesennuma gets around 154 mm of rain over 14.2 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 46% and peaks near 48% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
141
241
342
442
542
643
743
844
945
1045
1146
1247
1347
1448
1548
1648
1748
1848
1947
2047
2147
2247
2347
2447
2547
2647
2747
2847
2947
3047
3148

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1061437420
2061436430
3061436440
4061436440
5061435450
6061436450
7061436440
8061436440
9051436431
10051437431
11051437421
12151538411
13151538401
14151638391
15151639391
16151739381
17151739371
18151839361
19251938351
20261938341
21262037331
22272137331
23272237321
24272337311
25282436301
26182436291
27192536281
28192636271
291102735261
301102735251
311112835241

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 9 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
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 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 72 minutes over August. Sunrise moves from 4:38 AM to 5:06 AM, and sunset from 6:41 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.14:386:41
214.04:396:40
314.04:406:39
414.04:416:38
513.94:426:37
613.94:436:36
713.94:446:35
813.84:446:34
913.84:456:33
1013.84:466:31
1113.74:476:30
1213.74:486:29
1313.64:496:28
1413.64:506:26
1513.64:516:25
1613.54:526:24
1713.54:536:22
1813.54:546:21
1913.44:556:20
2013.44:566:18
2113.34:576:17
2213.34:576:15
2313.34:586:14
2413.24:596:12
2513.25:006:11
2613.15:016:09
2713.15:026:08
2813.15:036:06
2913.05:046:05
3013.05:056:03
3112.95:066:02

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.53 kWh/m².

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 5.46 kWh/m² in May across the year — August's 4.53 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.2Bright
294.2Bright
304.1Bright
314.1Bright
Planning a trip in August

Hazard calendar for Kesennuma

In seasonPeak

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

Kesennuma 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 Kesennuma?

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

5.8
Sightseeing
2nd-best month of the year
5.6
Beach & pool
1st-best month of the year

August is a reasonable time to visit Kesennuma for sightseeing.

What to pack for Kesennuma in August

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

In August, Kesennuma sees daytime highs around 26°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Kesennuma in August

The nearest coast averages about 22°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 22°C and coldest in March near 7°C.

It's comfortable for a long swim from Jul 21 to Oct 3 — about 2.5 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb8Bracing
Mar7Bracing
Apr9Bracing
May12Bracing
Jun17Cool
Jul20Cool
Aug22Refreshing
Sep22Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Kesennuma 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 Kesennuma peaks around August 18 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highVery highHighModerateLowAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul7High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Kesennuma 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 Kesennuma is worst in April — around 19 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1319 µg/m³Dec 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar18Moderate
Apr19Moderate
May17Moderate
Jun12Moderate
Jul11Good
Aug9Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Kesennuma?

Kesennuma sits at 38.9°N, 141.6°E, 14 m above sea level, in Japan. The nearest listed city is Rikuzen-Takata, 15 km away.

Topography around Kesennuma

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

Within 3 km, the terrain around Kesennuma has significant variations in elevation — a maximum elevation change of 350 m around an average of 54 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 890 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,889 m.

The land around Kesennuma is covered by trees (54%) and artificial surfaces (30%) within 3 km, trees (55%) and water (36%) within 16 km, and trees (54%) and water (33%) within 80 km.

3 km
350 m
16 km
890 m
80 km
1,889 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Rikuzen-Takata 15 km · Ōfunato 22 km · Ichinoseki 38 km · Tome 42 km · Ōshū 44 km · Mizusawa 46 km · Tōno 46 km · Kamaishi 49 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 Kesennuma (38.9011°, 141.5775°, elevation 14 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).