Kawasaki weather in September

In September, Kawasaki sees average daytime highs of 28°C and overnight lows near 20°C, with 166 mm of rain across 12.7 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Kawasaki's 4th-clearest and 9th-windiest month. For the whole year in context, see Kawasaki's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
166 mm
12.7 wet days
Daylight
12 h 12 min
6:05 AM – 6:17 PM
Cloud cover
62%
4th clearest
Wind
7 km/h
9th windiest
Solar energy
4.1 kWh/m²
Travel score
5.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 26°C by the end.

A typical September day in Kawasaki reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 32°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
82921
92921
102921
112921
122921
132921
142820
152820
162820
172820
182820
192820
202719
212719
222719
232719
242719
252718
262618
272618
282618
292618
302617

How September really feels in Kawasaki

Once humidity and wind are folded in, September averages 5 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
5
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kawasaki weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 598.61.6102.1
Feb11° / 6991.210.82.6
Mar15° / 11311.60.211.74.2
Apr20° / 10°12711.1012.86.0
May24° / 15°14410.5013.76.6
Jun27° / 19°30315.7014.25.3
Jul30° / 23°26416.90143.9
Aug32° / 24°15114.4013.23.7
Sep28° / 20°16612.7012.25.5
Oct23° / 14°988011.27.2
Nov17° / 808.1010.35.8
Dec12° / 638.40.69.83.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24555
34555
44555
54555
64654
74654
84654
94753
104753
114852
124753
134852
144753
154753
164753
174753
184753
194753
204753
214753
224852
234852
244852
254951
264951
274951
285050
295050
305149

Chance of precipitation in September

Any precipitation

Kawasaki gets around 166 mm of rain over 12.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
149
249
348
448
547
647
746
846
946
1045
1144
1244
1343
1442
1541
1641
1740
1839
1939
2038
2138
2237
2337
2436
2536
2635
2735
2835
2934
3034

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 61% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011125576
2011226565
3011327545
4011428534
5021529504
6021629494
7031730473
8031830453
9141930432
10152031412
11162131392
12172231372
13282331352
14292430331
153102430311
164122530291
174132529271
185142629261
196152628241
207162628221
217182727211
228192727191
239202726171
2410212726161
2510222825140
2611232824130
2713242824120
2814252723110
2915262722100
301726272190

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 5:54 AM to 6:15 AM, and sunset from 6:38 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:546:38
212.75:556:37
312.75:566:36
412.65:576:34
512.65:576:33
612.65:586:31
712.55:596:30
812.55:596:29
912.56:006:27
1012.46:016:26
1112.46:016:24
1212.36:026:23
1312.36:036:22
1412.36:046:20
1512.26:046:19
1612.26:056:17
1712.26:066:16
1812.16:066:14
1912.16:076:13
2012.16:086:11
2112.06:086:10
2212.06:096:09
2312.06:106:07
2411.96:116:06
2511.96:116:04
2611.86:126:03
2711.86:136:01
2811.86:136:00
2911.76:145:59
3011.76:155:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.1 kWh/m².

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 5.34 kWh/m² in May across the year — September's 4.1 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Bright
214.0Bright
224.0Moderate
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Kawasaki

In seasonPeak

In September, Kawasaki sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Kawasaki sits in the Pacific typhoon belt; the season peaks July–October.

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

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

Is September a good time to visit Kawasaki?

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

5.5
Sightseeing
5th-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Kawasaki in September

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

In September, Kawasaki sees daytime highs around 28°C and nights near 20°C. Pack light clothes. Worth having: rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Kawasaki in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 km away) is warmest in August at about 27°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 6 to Nov 9 — about 5.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec16Cool

UV index in Kawasaki in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Kawasaki peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJul 17UV 9Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Kawasaki in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Kawasaki is worst in April — around 25 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1225 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun18Moderate
Jul13Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Kawasaki?

Kawasaki sits at 33.6°N, 130.8°E, 47 m above sea level, in Japan. The nearest listed city is Tagawa, 4.0 km away.

Topography around Kawasaki

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

Within 3 km, the terrain around Kawasaki has significant variations in elevation — a maximum elevation change of 262 m around an average of 78 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 979 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Kawasaki is covered by trees (52%) and artificial surfaces (29%) within 3 km, trees (69%) within 16 km, and trees (46%) and water (36%) within 80 km.

3 km
262 m
16 km
979 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Tagawa 4.0 km · Kami 9.0 km · Akaike 11 km · Iizuka 13 km · Miyako 15 km · Nōgata 18 km · Miyata 19 km · Miyawaka 21 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 Kawasaki (33.5999°, 130.815°, elevation 47 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).