Sado weather in September

In September, Sado sees average daytime highs of 25°C and overnight lows near 21°C, with 141 mm of rain across 12.2 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 4th-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 26% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Sado's 6th-clearest and 8th-windiest month. For the whole year in context, see Sado's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
141 mm
12.2 wet days
Daylight
12 h 12 min
5:34 AM – 5:48 PM
Cloud cover
65%
6th clearest
Wind
12 km/h
8th windiest
Solar energy
4.18 kWh/m²
Travel score
6.2
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 Sado reaches about 25°C in the afternoon and slips back to 21°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12823
22723
32723
42723
52723
62722
72722
82622
92622
102622
112622
122621
132621
142521
152521
162521
172521
182520
192420
202420
212420
222420
232419
242419
252319
262319
272319
282318
292318
302218

How September really feels in Sado

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.

Sado 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 / 12920.910.59.70.2
Feb / 9117.28.410.50.3
Mar / 10116.63.611.71.5
Apr14° / 9112.10.2133.8
May19° / 13°93110145.9
Jun23° / 18°12610014.66.5
Jul27° / 22°20514.6014.45.6
Aug29° / 24°14511.5013.55.4
Sep25° / 21°14112.2012.36.2
Oct20° / 15°12912.20115.9
Nov14° / 12916.10.19.93.4
Dec / 15121.55.69.41.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% 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 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24456
34357
44357
54357
64357
74456
84357
94357
104357
114357
124357
134357
144357
154258
164258
174159
184258
194159
204159
214159
224159
234159
244159
254159
264060
274060
284258
294258
304258

Chance of precipitation in September

Any precipitation

Sado gets around 141 mm of rain over 12.2 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 45% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
144
244
344
444
545
644
744
844
944
1043
1143
1242
1342
1441
1541
1641
1740
1840
1939
2039
2139
2238
2338
2438
2538
2638
2738
2838
2939
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 27% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1041438403
2051638383
3051738373
4161838352
5162037342
6172137322
7182236312
8192336292
92102435271
103112534261
113122634241
124142633221
135152632211
146162731191
157172730171
169192829160
1710202828140
1811212926130
1913222925110
2014232924100
211624292380
221825292170
232026292060
242126291850
252327291740
262428291630
272628291420
282829291320
292930281210
303130271110

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 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 72 minutes over September. Sunrise moves from 5:20 AM to 5:46 AM, and sunset from 6:12 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:206:12
212.85:216:11
312.85:226:09
412.75:236:07
512.75:246:06
612.75:256:04
712.65:266:03
812.65:276:01
912.55:275:59
1012.55:285:58
1112.55:295:56
1212.45:305:55
1312.45:315:53
1412.35:325:51
1512.35:335:50
1612.25:345:48
1712.25:355:47
1812.25:355:45
1912.15:365:43
2012.15:375:42
2112.05:385:40
2212.05:395:38
2311.95:405:37
2411.95:415:35
2511.95:425:33
2611.85:435:32
2711.85:445:30
2811.75:445:29
2911.75:455:27
3011.75:465:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.18 kWh/m².

For context, solar energy here swings from a low near 1.78 kWh/m² to a high of 5.93 kWh/m² in May across the year — September's 4.18 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Bright
214.0Moderate
224.0Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Sado

In seasonPeak

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

Sado 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 Sado?

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

6.2
Sightseeing
2nd-best month of the year
5.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Sado for sightseeing.

What to pack for Sado in September

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

In September, Sado sees daytime highs around 25°C and nights near 21°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Sado in September

The nearest coast averages about 25°C in September — 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 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 24 to Oct 29 — about 4.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr11Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Sado in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sado peaks around August 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 14UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Sado 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 Sado is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (September, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1120 µg/m³Sep 159 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar20Moderate
Apr21Moderate
May18Moderate
Jun13Moderate
Jul11Good
Aug9Good
Sep9Good
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Sado?

Sado sits at 38.0°N, 138.4°E, 27 m above sea level, in Japan. The nearest listed city is Ryōtsu-minato, 9.0 km away.

Topography around Sado

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

Within 3 km, the terrain around Sado has only modest variations in elevation — a maximum elevation change of 227 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,155 m; within 80 km, large variations in elevation — a maximum elevation change of 1,125 m.

The land around Sado is covered by cropland (52%) and trees (38%) within 3 km, trees (59%) and water (30%) within 16 km, and water (78%) within 80 km.

3 km
227 m
16 km
1,155 m
80 km
1,125 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ryōtsu-minato 9.0 km · Maki 55 km · Yoshida-kasugachō 60 km · Niigata 61 km · Tsubame 64 km · Shirone 65 km · Kameda-honchō 68 km · Sanjō 69 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 Sado (38.025°, 138.3593°, elevation 27 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).