Owase weather in September

In September, Owase sees average daytime highs of 25°C and overnight lows near 22°C, with 329 mm of rain across 17 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 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 29% 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 Owase's 9th-clearest and 8th-windiest month. For the whole year in context, see Owase's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
329 mm
17 wet days
Daylight
12 h 12 min
5:43 AM – 5:56 PM
Cloud cover
63%
9th clearest
Wind
14 km/h
8th windiest
Solar energy
4.03 kWh/m²
Travel score
5.7
out of 10

Owase is city in Mie Prefecture, Japan.

Density
88/km²
people per km²
Founded
1954

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 26°C in the first days to 23°C by the end.

A typical September day in Owase reaches about 25°C in the afternoon and slips back to 22°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°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)
12624
22624
32624
42624
52624
62624
72623
82623
92623
102623
112523
122523
132523
142523
152523
162522
172522
182522
192522
202422
212422
222422
232421
242421
252421
262421
272321
282321
292321
302320

Owase 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 / 977.11.4102.2
Feb10° / 1008.51.310.72.4
Mar13° / 18311.40.611.73.5
Apr16° / 12°19411.5012.85.0
May20° / 17°23113.3013.75.7
Jun23° / 20°32617.1014.25.2
Jul26° / 24°24416.10145.6
Aug27° / 25°23015013.35.8
Sep25° / 22°32917012.25.7
Oct21° / 18°34315.1011.15.8
Nov17° / 13°15610.4010.25.4
Dec12° / 977.60.49.83.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34555
44456
54456
64456
74456
84456
94357
104357
114357
124456
134357
144357
154357
164258
174357
184258
194357
204159
214258
224258
234258
244258
254258
264258
274357
284357
294357
304258

Chance of precipitation in September

Any precipitation

Owase gets around 329 mm of rain over 17 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 56% and peaks near 58% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
155
255
356
456
557
657
758
858
958
1058
1158
1258
1357
1457
1557
1656
1756
1856
1956
2056
2156
2255
2355
2455
2555
2655
2756
2856
2957
3057

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 68% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101523647
201624627
301625626
401727596
502728585
612829555
712830554
813931533
9131032513
10141133492
11151233472
12251334451
13261434431
14271634401
15381733381
16391933350
174102033330
184112133300
195122232280
206132432260
216142531240
227152630220
238162630200
248172729190
259182828170
2610182928150
2711192927140
2812193027120
2913203026110
3014213125100

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

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 5:33 AM to 5:53 AM, and sunset from 6:17 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:336:17
212.75:336:16
312.75:346:14
412.65:356:13
512.65:356:12
612.65:366:10
712.55:376:09
812.55:386:07
912.55:386:06
1012.45:396:05
1112.45:406:03
1212.45:406:02
1312.35:416:00
1412.35:425:59
1512.25:435:57
1612.25:435:56
1712.25:445:54
1812.15:455:53
1912.15:455:51
2012.15:465:50
2112.05:475:48
2212.05:485:47
2312.05:485:46
2411.95:495:44
2511.95:505:43
2611.85:515:41
2711.85:515:40
2811.85:525:38
2911.75:535:37
3011.75:535:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.03 kWh/m².

For context, solar energy here swings from a low near 2.69 kWh/m² to a high of 5.33 kWh/m² in May across the year — September's 4.03 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.3Bright
84.3Bright
94.3Bright
104.2Bright
114.2Bright
124.2Bright
134.1Bright
144.1Bright
154.1Bright
164.0Bright
174.0Moderate
184.0Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Owase

In seasonPeak

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

Owase 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 Owase?

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

5.7
Sightseeing
3rd-best month of the year
5.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Owase for sightseeing.

What to pack for Owase in September

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

In September, Owase sees daytime highs around 25°C and nights near 22°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Owase 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 17 km away) is warmest in August at about 27°C and coldest in February near 16°C.

It's comfortable for a long swim from May 21 to Nov 29 — about 6.3 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar16Cool
Apr18Cool
May20Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Owase 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 Owase peaks around July 13 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 13UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Owase 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 Owase is worst in April — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1318 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar18Moderate
Apr18Moderate
May17Moderate
Jun13Moderate
Jul9Good
Aug9Good
Sep9Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Owase?

Owase sits at 34.1°N, 136.2°E, 4 m above sea level, in Japan. The nearest listed city is Kumano, 19 km away.

Topography around Owase

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

Within 3 km, the terrain around Owase has significant variations in elevation — a maximum elevation change of 527 m around an average of 140 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,688 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,878 m.

The land around Owase is covered by trees (70%) within 3 km, trees (67%) and water (31%) within 16 km, and trees (61%) and water (32%) within 80 km.

3 km
527 m
16 km
1,688 m
80 km
1,878 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kumano 19 km · Shingū 42 km · Ōuda-yamaguchi 49 km · Shimobuchi 52 km · Gojō 56 km · Haibara-akanedai 57 km · Sakurai 58 km · Kashiwara 58 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 Owase (34.0667°, 136.2°, 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).