Tsukawaki weather in September

In September, Tsukawaki sees average daytime highs of 26°C and overnight lows near 19°C, with 197 mm of rain across 14.6 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 28°C in the first days to 24°C by the end. The sky is clear or mostly clear about 24% 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 Tsukawaki's 8th-clearest and 12th-windiest month. For the whole year in context, see Tsukawaki's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
197 mm
14.6 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
66%
8th clearest
Wind
7 km/h
12th windiest
Solar energy
3.95 kWh/m²
Travel score
5.8
out of 10

Tsukawaki is settlement in Japan.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 24°C by the end.

A typical September day in Tsukawaki reaches about 26°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°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)
12821
22821
32821
42820
52820
62820
72820
82720
92720
102720
112719
122719
132719
142619
152619
162619
172618
182618
192618
202518
212518
222517
232517
242517
252517
262417
272416
282416
292416
302416

How September really feels in Tsukawaki

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.

Tsukawaki 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 / -0°688.53101.2
Feb / 809.42.410.81.8
Mar13° / 12312.71.211.73.5
Apr18° / 13411.70.112.85.6
May23° / 13°15112.1013.76.3
Jun25° / 18°31717.4014.25.3
Jul29° / 22°23117.60144.4
Aug30° / 22°16716013.24.3
Sep26° / 19°19714.6012.25.8
Oct21° / 12°1259011.26.7
Nov16° / 818.40.110.35.0
Dec10° / 668.31.39.82.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23862
33961
43961
53961
64060
74060
84159
94060
104159
114258
124357
134357
144258
154357
164357
174357
184456
194357
204456
214456
224456
234357
244555
254555
264456
274555
284456
294456
304555

Chance of precipitation in September

Any precipitation

Tsukawaki gets around 197 mm of rain over 14.6 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 48% 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
355
455
555
654
754
853
953
1052
1151
1250
1349
1449
1548
1647
1746
1846
1945
2044
2144
2243
2343
2442
2542
2641
2740
2840
2940
3039

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
103174238
204184336
304184434
415194431
516204429
617214428
718214426
819224325
9210224323
10211234222
11312234121
12314244020
13415243818
14516243717
15618243616
16719243515
17820253314
181021253213
191122253012
201223252911
211324252710
22152526269
23162626248
24172626238
25192726227
26212726216
27222826195
28242825185
29262825174
30282824164

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:53 AM to 6:13 AM, and sunset from 6:37 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:536:37
212.75:546:35
312.75:556:34
412.65:556:33
512.65:566:31
612.65:576:30
712.55:576:29
812.55:586:27
912.45:596:26
1012.46:006:24
1112.46:006:23
1212.36:016:21
1312.36:026:20
1412.36:026:19
1512.26:036:17
1612.26:046:16
1712.26:046:14
1812.16:056:13
1912.16:066:11
2012.16:066:10
2112.06:076:09
2212.06:086:07
2312.06:086:06
2411.96:096:04
2511.96:106:03
2611.96:116:02
2711.86:116:00
2811.86:125:59
2911.76:135:57
3011.76:135:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.95 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.3 kWh/m² in May across the year — September's 3.95 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.0Bright
144.0Bright
154.0Moderate
164.0Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Tsukawaki

In seasonPeak

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

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

Tsukawaki'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 Tsukawaki?

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
5.6
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Tsukawaki for sightseeing.

What to pack for Tsukawaki in September

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

In September, Tsukawaki sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Tsukawaki 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 39 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 Tsukawaki 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 Tsukawaki peaks around June 21 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highModerateJun 21UV 10Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Tsukawaki 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 Tsukawaki is worst in March — around 30 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (September, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1829 µg/m³Sep 2214 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar30Moderate
Apr24Moderate
May22Moderate
Jun19Moderate
Jul14Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Tsukawaki?

Tsukawaki sits at 33.3°N, 131.2°E, 336 m above sea level, in Japan. The nearest listed city is Hita, 21 km away.

Topography around Tsukawaki

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

Within 3 km, the terrain around Tsukawaki has significant variations in elevation — a maximum elevation change of 495 m around an average of 408 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,384 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Tsukawaki is covered by trees (54%) and cropland (24%) within 3 km, trees (86%) within 16 km, and trees (58%) and water (23%) within 80 km.

3 km
495 m
16 km
1,384 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hita 21 km · Yufu 23 km · Beppu 32 km · Yokkaichi 33 km · Nakatsu 36 km · Hiji 36 km · Buzen 37 km · Aso 38 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 Tsukawaki (33.2767°, 131.1563°, elevation 336 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).