Tsurugashima weather in September

In September, Tsurugashima sees average daytime highs of 27°C and overnight lows near 21°C, with 186 mm of rain across 14.1 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-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 22% of the time in September, and the air most often feels muggy.

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 Tsurugashima's 10th-clearest and 7th-windiest month. For the whole year in context, see Tsurugashima's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
186 mm
14.1 wet days
Daylight
12 h 12 min
5:30 AM – 5:43 PM
Cloud cover
67%
10th clearest
Wind
8 km/h
7th windiest
Solar energy
3.54 kWh/m²
Travel score
5.5
out of 10

Tsurugashima is city in Saitama Prefecture, Japan.

Density
3,973/km²
people per km²
Founded
1991

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 Tsurugashima reaches about 27°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°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)
13023
23023
32923
42923
52923
62922
72922
82922
92822
102822
112822
122821
132821
142721
152721
162721
172720
182720
192620
202620
212619
222619
232619
242519
252519
262518
272518
282518
292418
302418

How September really feels in Tsurugashima

Once humidity and wind are folded in, September averages 2 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
2
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Tsurugashima weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5761.89.82.1
Feb10° / 536.4210.62.5
Mar14° / 9711.2111.73.8
Apr19° / 10610.70.212.95.8
May23° / 15°12712.2013.96.4
Jun26° / 19°16214.2014.45.6
Jul30° / 23°17014.7014.24.4
Aug31° / 24°12812.3013.44.1
Sep27° / 21°18614.1012.25.5
Oct21° / 14°19612.4011.16.2
Nov16° / 768.6010.15.4
Dec11° / 506.50.29.63.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53961
63862
73862
83862
93862
103862
113763
123862
133862
143763
153664
163763
173763
183763
193664
203664
213664
223664
233664
243763
253763
263763
273763
283862
293862
303961

Chance of precipitation in September

Any precipitation

Tsurugashima gets around 186 mm of rain over 14.1 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 47% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
147
247
347
448
548
648
748
848
948
1048
1148
1248
1348
1448
1548
1648
1748
1848
1948
2047
2147
2247
2347
2446
2546
2646
2746
2846
2945
3045

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101932489
2011033479
3021034468
4021134467
5021135457
6131235436
7131335426
8141435406
9151635395
10151735375
11261834354
12272034334
13282133324
14382333303
15492432283
164102631253
175122830232
186132929212
196143028192
207163127172
218173226152
229183325131
239203424121
2410213423101
251122352291
261223362171
271324362161
281425362050
291526361940
301627361830

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
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 5:18 AM to 5:41 AM, and sunset from 6:06 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:186:06
212.85:196:05
312.75:206:03
412.75:206:02
512.65:216:00
612.65:225:59
712.65:235:57
812.55:245:56
912.55:245:54
1012.55:255:53
1112.45:265:51
1212.45:275:50
1312.35:285:48
1412.35:285:47
1512.35:295:45
1612.25:305:43
1712.25:315:42
1812.15:325:40
1912.15:325:39
2012.15:335:37
2112.05:345:36
2212.05:355:34
2312.05:365:33
2411.95:365:31
2511.95:375:30
2611.85:385:28
2711.85:395:27
2811.85:405:25
2911.75:415:24
3011.75:415:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.54 kWh/m².

For context, solar energy here swings from a low near 2.4 kWh/m² to a high of 5.05 kWh/m² in May across the year — September's 3.54 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.2Moderate
293.1Moderate
303.1Moderate
Planning a trip in September

Is September a good time to visit Tsurugashima?

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

5.5
Sightseeing
5th-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Tsurugashima for sightseeing.

What to pack for Tsurugashima in September

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

In September, Tsurugashima sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. About 14 days see rain.

light clothesrain gear

Sea temperature near Tsurugashima 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 at the nearest coast (about 57 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Tsurugashima 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 Tsurugashima peaks around July 16 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 16UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Tsurugashima 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 Tsurugashima is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Tsurugashima?

Tsurugashima sits at 36.0°N, 139.4°E, 33 m above sea level, in Japan. The nearest listed city is Sakado, 1.0 km away.

Topography around Tsurugashima

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

Within 3 km, the terrain around Tsurugashima has only modest variations in elevation — a maximum elevation change of 39 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 717 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,579 m.

The land around Tsurugashima is covered by artificial surfaces (64%) within 3 km, artificial surfaces (38%) and trees (36%) within 16 km, and trees (49%) and artificial surfaces (28%) within 80 km.

3 km
39 m
16 km
717 m
80 km
2,579 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sakado 1.0 km · Igusa 6.0 km · Hidaka 6.0 km · Higashi-Matsuyama 8.0 km · Ōgushi 9.0 km · Morohongō 9.0 km · Kawagoe 9.0 km · Sayama 12 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 Tsurugashima (35.96°, 139.4028°, elevation 33 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. 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).