Shizuoka weather in September

In September, Shizuoka sees average daytime highs of 25°C and overnight lows near 21°C, with 277 mm of rain across 16.5 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 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels oppressive.

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 Shizuoka's 9th-clearest and 9th-windiest month. For the whole year in context, see Shizuoka's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
277 mm
16.5 wet days
Daylight
12 h 12 min
5:34 AM – 5:47 PM
Cloud cover
64%
9th clearest
Wind
9 km/h
9th windiest
Solar energy
4.14 kWh/m²
Travel score
5.7
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 Shizuoka 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 23°C and 28°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12723
22723
32723
42723
52723
62623
72623
82623
92622
102622
112622
122622
132622
142522
152522
162521
172521
182521
192521
202521
212421
222421
232420
242420
252420
262420
272420
282320
292319
302319

Shizuoka 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 / 958.40.49.92.1
Feb10° / 1189.30.710.72.2
Mar12° / 21114.40.211.73.0
Apr16° / 11°22513.6012.94.6
May20° / 15°23413.9013.85.6
Jun23° / 19°29117.2014.35.3
Jul26° / 23°32318.5014.15.2
Aug28° / 24°19116.3013.35.5
Sep25° / 21°27716.5012.25.7
Oct21° / 17°24714.1011.15.9
Nov16° / 12°15011.4010.25.1
Dec12° / 928.30.19.73.3

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 15% of September, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34654
44555
54555
64357
74357
84357
94258
104258
114258
124159
134159
144060
154159
164060
174060
184060
193961
204060
214060
224060
234060
244060
254060
264060
274060
284159
294159
304159

Chance of precipitation in September

Any precipitation

Shizuoka gets around 277 mm of rain over 16.5 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 55% and peaks near 57% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
154
254
354
455
555
656
756
856
956
1057
1157
1256
1356
1456
1555
1655
1755
1854
1954
2054
2154
2254
2354
2454
2554
2654
2754
2854
2955
3055

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100627616
200728596
300729595
401830565
501930555
6011031544
7011131534
8021232513
9021433493
10031533462
11031634442
12141735422
13151935392
14152035371
15162236341
16182336311
17292436281
182102636261
192112736231
203132835210
213142935180
224163034160
234173133150
245183232130
255193331110
266213330100
27622342990
28723352870
29824352760
30925352650

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
2810calm
2910calm
3010calm

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 5:23 AM to 5:45 AM, and sunset from 6:09 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:236:09
212.75:246:08
312.75:256:06
412.75:256:05
512.65:266:04
612.65:276:02
712.65:286:01
812.55:285:59
912.55:295:58
1012.45:305:56
1112.45:315:55
1212.45:315:53
1312.35:325:52
1412.35:335:50
1512.35:345:49
1612.25:345:47
1712.25:355:46
1812.15:365:44
1912.15:375:43
2012.15:375:41
2112.05:385:40
2212.05:395:38
2312.05:405:37
2411.95:405:35
2511.95:415:34
2611.85:425:32
2711.85:435:31
2811.85:435:29
2911.75:445:28
3011.75:455:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.14 kWh/m².

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 5.48 kWh/m² in May across the year — September's 4.14 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Shizuoka

In seasonPeak

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

Shizuoka 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 Shizuoka?

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

5.7
Sightseeing
2nd-best month of the year
5.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Shizuoka for sightseeing.

What to pack for Shizuoka in September

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

In September, Shizuoka sees daytime highs around 25°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Shizuoka 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 offshore is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 28 to Nov 26 — about 6 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Shizuoka 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 Shizuoka peaks around July 22 at about 10 (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 22UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Shizuoka 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 Shizuoka is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Shizuoka?

Shizuoka sits at 35.0°N, 138.4°E, 23 m above sea level, in Japan. The nearest listed city is Yaizu, 14 km away.

Topography around Shizuoka

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

Within 3 km, the terrain around Shizuoka has only modest variations in elevation — a maximum elevation change of 213 m around an average of 28 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,098 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,736 m.

The land around Shizuoka is covered by artificial surfaces (75%) within 3 km, trees (51%) and water (29%) within 16 km, and trees (55%) and water (35%) within 80 km.

3 km
213 m
16 km
1,098 m
80 km
3,736 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Yaizu 14 km · Fujieda 17 km · Shimada 26 km · Sumiyoshi 29 km · Kanaya 30 km · Fujinomiya 34 km · Fuji 34 km · Maruobara 35 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 Shizuoka (34.9833°, 138.3833°, elevation 23 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).