Uto weather in September

In September, Uto sees average daytime highs of 27°C and overnight lows near 21°C, with 156 mm of rain across 11.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 25°C by the end. The sky is clear or mostly clear about 36% 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 Uto's 4th-clearest and 9th-windiest month. For the whole year in context, see Uto's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
156 mm
11.8 wet days
Daylight
12 h 12 min
6:06 AM – 6:18 PM
Cloud cover
58%
4th clearest
Wind
8 km/h
9th windiest
Solar energy
4.06 kWh/m²
Travel score
6.1
out of 10

Uto is city in Kumamoto Prefecture, Japan.

Density
505/km²
people per km²
Founded
1958

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 29°C in the first days to 25°C by the end.

A typical September day in Uto reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°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°35°151015202530
Avg high (°C)Avg low (°C)
12923
22923
32923
42923
52923
62822
72822
82822
92822
102822
112822
122822
132821
142821
152721
162721
172721
182721
192720
202720
212720
222620
232620
242620
252619
262619
272619
282619
292519
302519

How September really feels in Uto

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.

Uto weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7910.61.810.11.8
Feb10° / 9610.21.210.82.3
Mar14° / 14213.10.211.83.8
Apr18° / 11°15412.1012.85.5
May22° / 15°17812013.76.4
Jun25° / 20°40317014.15.4
Jul29° / 23°30116.3013.94.8
Aug30° / 24°13513013.24.7
Sep27° / 21°15611.8012.26.1
Oct23° / 15°988.3011.27.1
Nov17° / 10°938.8010.35.6
Dec11° / 84100.99.92.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34852
44852
54852
64753
74852
84852
94852
104852
114951
125050
135050
145050
155149
165149
175149
185149
195149
205149
215248
225248
235248
245347
255347
265347
275347
285347
295446
305446

Chance of precipitation in September

Any precipitation

Uto gets around 156 mm of rain over 11.8 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 38% and peaks near 44% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
144
244
344
443
543
643
742
842
942
1041
1140
1240
1339
1438
1537
1637
1736
1836
1935
2035
2135
2235
2335
2435
2535
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 32% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101829593
201930582
3011031562
4011132542
5021233512
6021234511
7131334481
8131434461
9141534451
10151634431
11261734411
12271834391
13381833371
14491933341
154112033320
165122032300
176132132280
187142231260
197162230240
208172330220
219182429210
2210192428190
2310202528170
2411212527160
2512222626140
2612222726130
2713232725120
2814242724100
291525272390
301625272290

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.

0246810151015202530
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 5:56 AM to 6:15 AM, and sunset from 6:38 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:566:38
212.75:566:37
312.65:576:36
412.65:586:34
512.65:586:33
612.55:596:32
712.56:006:30
812.56:006:29
912.46:016:27
1012.46:026:26
1112.46:026:25
1212.36:036:23
1312.36:046:22
1412.36:046:20
1512.26:056:19
1612.26:066:18
1712.26:066:16
1812.16:076:15
1912.16:086:13
2012.16:086:12
2112.06:096:11
2212.06:106:09
2312.06:106:08
2411.96:116:06
2511.96:126:05
2611.96:126:04
2711.86:136:02
2811.86:146:01
2911.86:145:59
3011.76:155:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.15 kWh/m² in May across the year — September's 4.06 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Bright
214.0Bright
224.0Moderate
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Uto

In seasonPeak

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

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

Uto's rainy season runs June–July, 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 Uto?

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

6.1
Sightseeing
3rd-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Uto in September

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

In September, Uto sees daytime highs around 27°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Uto 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 22 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 27 to Nov 13 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Uto 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 Uto peaks around June 22 at about 10 (extreme) — 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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 22UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Uto 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 Uto is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Uto?

Uto sits at 32.7°N, 130.7°E, 4 m above sea level, in Japan. The nearest listed city is Matsubase, 4.0 km away.

Topography around Uto

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

Within 3 km, the terrain around Uto has significant variations in elevation — a maximum elevation change of 270 m around an average of 23 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 663 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,762 m.

The land around Uto is covered by artificial surfaces (33%), cropland (32%) and trees (29%) within 3 km, trees (34%), cropland (22%) and water (22%) within 16 km, and trees (64%) and water (20%) within 80 km.

3 km
270 m
16 km
663 m
80 km
1,762 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Matsubase 4.0 km · Uki 7.0 km · Kotō 13 km · Kumamoto 14 km · Shimada 14 km · Mifune 15 km · Honmachi 21 km · Ōyanomachi-noboritate 24 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 Uto (32.6833°, 130.6667°, elevation 4 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).