Kawanoechō weather in September

In September, Kawanoechō sees average daytime highs of 26°C and overnight lows near 20°C, with 249 mm of rain across 15.6 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 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels muggy.

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 Kawanoechō's 9th-clearest and 8th-windiest month. For the whole year in context, see Kawanoechō's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
249 mm
15.6 wet days
Daylight
12 h 12 min
5:54 AM – 6:06 PM
Cloud cover
64%
9th clearest
Wind
8 km/h
8th windiest
Solar energy
4.21 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 23°C by the end.

A typical September day in Kawanoechō reaches about 26°C in the afternoon and slips back to 20°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12823
22822
32722
42722
52722
62722
72722
82722
92722
102721
112621
122621
132621
142621
152621
162620
172520
182520
192520
202520
212519
222419
232419
242419
252419
262419
272418
282318
292318
302318

How September really feels in Kawanoechō

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Kawanoechō 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
Jan / 8013.73.6101.0
Feb / 8811.93.610.71.3
Mar12° / 12813.41.511.72.8
Apr16° / 10°14211.90.112.84.9
May21° / 14°17012.1013.76.1
Jun24° / 19°26816.3014.25.5
Jul27° / 23°26517.60145.0
Aug29° / 24°18216.6013.34.8
Sep26° / 20°24915.6012.25.8
Oct20° / 15°18911.9011.16.2
Nov15° / 9810.30.110.24.6
Dec10° / 9312.529.82.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24456
34456
44456
54555
64456
74456
84456
94357
104357
114456
124357
134357
144456
154357
164456
174456
184357
194357
204357
214357
224357
234456
244456
254456
264456
274456
284555
294654
304654

Chance of precipitation in September

Any precipitation

Kawanoechō gets around 249 mm of rain over 15.6 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 52% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
156
256
356
456
555
655
755
855
955
1055
1154
1254
1353
1453
1552
1652
1752
1851
1951
2050
2150
2249
2349
2448
2548
2648
2747
2847
2947
3047

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021129571
2031230550
3031231540
4031333510
5141434480
6141534460
7151635430
8161736410
9171736380
10271836360
11281936340
123102036320
133112135300
144122235270
155132334250
166152333230
176162432220
187182531200
198192629180
209202628170
2110212727150
2210232726140
2311242825120
2412252824110
251326292390
261426292280
271527292270
281628302160
291728302050
301828301950

Wind in September

Winds average 8 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.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
128calm
138calm
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 5:43 AM to 6:04 AM, and sunset from 6:28 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:436:28
212.75:446:26
312.75:456:25
412.65:456:24
512.65:466:22
612.65:476:21
712.55:476:19
812.55:486:18
912.55:496:16
1012.45:496:15
1112.45:506:14
1212.45:516:12
1312.35:526:11
1412.35:526:09
1512.25:536:08
1612.25:546:06
1712.25:546:05
1812.15:556:03
1912.15:566:02
2012.15:576:00
2112.05:575:59
2212.05:585:58
2312.05:595:56
2411.96:005:55
2511.96:005:53
2611.86:015:52
2711.86:025:50
2811.86:025:49
2911.76:035:47
3011.76:045:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.21 kWh/m².

For context, solar energy here swings from a low near 2.36 kWh/m² to a high of 5.59 kWh/m² in May across the year — September's 4.21 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
254.0Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Kawanoechō

In seasonPeak

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

Kawanoechō 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 September a good time to visit Kawanoechō?

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

5.8
Sightseeing
3rd-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Kawanoechō for sightseeing.

What to pack for Kawanoechō in September

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

In September, Kawanoechō sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Kawanoechō in September

The nearest coast averages about 27°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 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 12 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct24Refreshing
Nov20Cool
Dec16Cool

UV index in Kawanoechō in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Kawanoechō peaks around July 11 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 11UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Kawanoechō 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 Kawanoechō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1321 µg/m³Oct 1311 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr22Moderate
May19Moderate
Jun16Moderate
Jul13Moderate
Aug12Moderate
Sep11Good
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Kawanoechō?

Kawanoechō sits at 34.0°N, 133.6°E, 13 m above sea level, in Japan. The nearest listed city is Shikokuchūō, 5.0 km away.

Topography around Kawanoechō

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

Within 3 km, the terrain around Kawanoechō has significant variations in elevation — a maximum elevation change of 253 m around an average of 37 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,447 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,946 m.

The land around Kawanoechō is covered by water (34%), artificial surfaces (32%) and trees (30%) within 3 km, trees (48%) and water (40%) within 16 km, and trees (61%) and water (28%) within 80 km.

3 km
253 m
16 km
1,447 m
80 km
1,946 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Shikokuchūō 5.0 km · Kan’onjichō 14 km · Ikedachō 21 km · Mitoyo 23 km · Niihama 26 km · Shioiri 30 km · Zentsujichó 30 km · Tadotsu 33 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 Kawanoechō (34.0165°, 133.5784°, elevation 13 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).