Tsuyama weather in September

In September, Tsuyama sees average daytime highs of 27°C and overnight lows near 19°C, with 181 mm of rain across 11.6 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 30°C in the first days to 25°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Tsuyama's 8th-clearest and 6th-windiest month. For the whole year in context, see Tsuyama's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
181 mm
11.6 wet days
Daylight
12 h 12 min
5:52 AM – 6:05 PM
Cloud cover
63%
8th clearest
Wind
8 km/h
6th windiest
Solar energy
4.21 kWh/m²
Travel score
5.8
out of 10

Tsuyama is city in Okayama Prefecture, Japan.

Density
202/km²
people per km²
Founded
1929

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 30°C in the first days to 25°C by the end.

A typical September day in Tsuyama reaches about 27°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13021
23021
33021
42921
52921
62921
72920
82920
92920
102820
112820
122819
132819
142819
152819
162719
172718
182718
192718
202718
212618
222617
232617
242617
252617
262516
272516
282516
292516
302516

How September really feels in Tsuyama

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.

Tsuyama 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 / -1°466.11.99.91.4
Feb / -1°567.52.310.71.9
Mar13° / 11010.90.711.73.5
Apr19° / 12010.5012.95.9
May23° / 13°14410.9013.86.6
Jun26° / 18°18813.2014.35.7
Jul30° / 22°22916.1014.14.1
Aug31° / 23°14013.5013.33.9
Sep27° / 19°18111.6012.25.8
Oct22° / 12°1137.7011.17.0
Nov16° / 616.1010.25.5
Dec10° / 526.30.89.72.7

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 19% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34555
44753
54753
64753
74753
84753
94753
104753
114753
124753
134753
144654
154654
164555
174555
184456
194555
204456
214456
224456
234555
244555
254654
264654
274654
284654
294753
304852

Chance of precipitation in September

Any precipitation

Tsuyama gets around 181 mm of rain over 11.6 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 38% and peaks near 43% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
343
443
543
642
742
842
942
1041
1141
1241
1340
1440
1539
1639
1738
1838
1937
2037
2136
2236
2335
2435
2534
2633
2733
2832
2932
3032

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 45% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1061832421
2071933401
3072133381
4182233361
5182333341
6192433331
71102532311
82112632291
92112732281
102122731261
113132831241
124142930221
135152929211
146163028191
157173028181
168183027161
179203026151
1811213025131
1912223024120
2013233022110
2115243021100
221625302090
231726291980
241927291870
252028281770
262129281660
272330271550
282431261440
292632261340
302832251230

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
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 48 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 66 minutes over September. Sunrise moves from 5:41 AM to 6:03 AM, and sunset from 6:27 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:416:27
212.75:416:25
312.75:426:24
412.75:436:23
512.65:446:21
612.65:446:20
712.65:456:18
812.55:466:17
912.55:476:15
1012.45:476:14
1112.45:486:12
1212.45:496:11
1312.35:506:09
1412.35:506:08
1512.35:516:06
1612.25:526:05
1712.25:536:03
1812.15:536:02
1912.15:546:00
2012.15:555:59
2112.05:565:57
2212.05:565:56
2312.05:575:54
2411.95:585:53
2511.95:595:51
2611.85:595:50
2711.86:005:48
2811.86:015:47
2911.76:025:45
3011.76:035:44

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 2.27 kWh/m² to a high of 5.68 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
34.7Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
254.0Moderate
264.0Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Tsuyama

In seasonPeak

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

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

Tsuyama's rainy season runs March–October, 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 Tsuyama?

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

5.8
Sightseeing
4th-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Tsuyama in September

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

In September, Tsuyama sees daytime highs around 27°C and nights near 19°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Tsuyama 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 59 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 Jun 7 to Nov 12 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov20Cool
Dec16Cool

UV index in Tsuyama 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 Tsuyama peaks around July 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highModerateJul 16UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May9Very high
Jun10Very high
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Tsuyama 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 Tsuyama is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1421 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun17Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct10Good
Nov12Good
Dec11Good
Location & terrain

Where is Tsuyama?

Tsuyama sits at 35.1°N, 134.0°E, 97 m above sea level, in Japan. The nearest listed city is Hayashino, 15 km away.

Topography around Tsuyama

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

Within 3 km, the terrain around Tsuyama has significant variations in elevation — a maximum elevation change of 408 m around an average of 164 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,076 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,626 m.

The land around Tsuyama is covered by trees (56%) and artificial surfaces (33%) within 3 km, trees (79%) within 16 km, and trees (66%) and water (23%) within 80 km.

3 km
408 m
16 km
1,076 m
80 km
1,626 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Hayashino 15 km · Maniwa 26 km · Akaiwa 27 km · Sayō 33 km · Bizen 37 km · Kamigōri 39 km · Okayama 45 km · Kurayoshi 46 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 Tsuyama (35.0521°, 133.9989°, elevation 97 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).