Omaezaki weather in September

In September, Omaezaki sees average daytime highs of 25°C and overnight lows near 24°C, with 240 mm of rain across 15.6 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 35% 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 Omaezaki's 9th-clearest and 8th-windiest month. For the whole year in context, see Omaezaki's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
24°
10th coldest
Rainfall
240 mm
15.6 wet days
Daylight
12 h 12 min
5:35 AM – 5:48 PM
Cloud cover
58%
9th clearest
Wind
21 km/h
8th windiest
Solar energy
4.41 kWh/m²
Travel score
5.9
out of 10

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 24°C by the end.

A typical September day in Omaezaki reaches about 25°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 24°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)
12725
22725
32625
42625
52625
62625
72625
82625
92625
102624
112624
122624
132624
142624
152624
162524
172524
182523
192523
202523
212523
222523
232523
242523
252423
262422
272422
282422
292422
302422

Omaezaki 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 daysDaylight (hours)Travel score
Jan11° / 948.39.92.8
Feb11° / 1129.310.72.9
Mar14° / 10°18012.911.73.7
Apr17° / 14°17711.812.85.1
May20° / 18°20811.613.86.0
Jun22° / 21°29014.514.35.6
Jul26° / 24°24013.614.16.1
Aug27° / 26°13713.213.36.2
Sep25° / 24°24015.612.25.9
Oct22° / 20°25914.111.16.1
Nov18° / 15°16012.110.25.6
Dec13° / 10°949.59.74.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15248
25248
35248
45149
55050
65050
75050
84951
94951
104951
114951
124951
134951
145050
155050
165050
174951
184951
194951
204951
214951
224852
234753
244753
254753
264753
274753
284654
294654
304654

Chance of precipitation in September

Any precipitation

Omaezaki gets around 240 mm of rain over 15.6 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 52% and peaks near 53% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
148
249
350
451
552
652
753
853
953
1053
1153
1253
1353
1453
1552
1652
1752
1852
1952
2052
2152
2252
2352
2452
2552
2652
2752
2853
2953
3053

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 79% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1002175031
2003185030
3003195028
4003205027
5004214926
6004224924
7005234823
8006254722
9017264620
10018274619
11019284517
120110294416
130211304315
140212304213
150314314012
160415323910
17041633379
18051834367
19061934346
20172035325
21182235304
22192336284
231102436263
241112536252
251122637232
261132737211
271142837191
281152937171
292153037151
302163136141

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720breezy
820breezy
920breezy
1020breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1622breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2823breezy
2923breezy
3023breezy

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 5:24 AM to 5:46 AM, and sunset from 6:10 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:246:10
212.75:256:08
312.75:256:07
412.75:266:05
512.65:276:04
612.65:286:03
712.55:286:01
812.55:296:00
912.55:305:58
1012.45:315:57
1112.45:315:55
1212.45:325:54
1312.35:335:52
1412.35:345:51
1512.35:345:49
1612.25:355:48
1712.25:365:46
1812.15:375:45
1912.15:375:43
2012.15:385:42
2112.05:395:40
2212.05:405:39
2312.05:405:37
2411.95:415:36
2511.95:425:35
2611.85:435:33
2711.85:435:32
2811.85:445:30
2911.75:455:29
3011.75:465:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.41 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 5.59 kWh/m² in May across the year — September's 4.41 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Moderate
264.0Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Omaezaki

In seasonPeak

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

Omaezaki 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 Omaezaki?

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

5.9
Sightseeing
5th-best month of the year
5.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Omaezaki for sightseeing.

What to pack for Omaezaki in September

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

In September, Omaezaki sees daytime highs around 25°C and nights near 24°C. Pack rain gear. Worth having: light clothes and a windbreaker. About 16 days see rain.

rain gearlight clothesa windbreaker

Sea temperature near Omaezaki 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 16°C.

It's comfortable for a long swim from May 25 to Nov 29 — about 6.2 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec19Cool

UV index in Omaezaki 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 Omaezaki peaks around August 10 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateAug 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

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

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May19Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep10Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Omaezaki?

Omaezaki sits at 34.6°N, 138.2°E, 43 m above sea level, in Japan. The nearest listed city is Ōyama, 1.0 km away.

Topography around Omaezaki

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

Within 3 km, the terrain around Omaezaki has only modest variations in elevation — a maximum elevation change of 51 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 154 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,297 m.

The land around Omaezaki is covered by water (74%) within 3 km, water (82%) within 16 km, and water (56%) and trees (36%) within 80 km.

3 km
51 m
16 km
154 m
80 km
2,297 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ōyama 1.0 km · Sagara 10 km · Kikugawa 15 km · Sumiyoshi 17 km · Maruobara 17 km · Shimada 24 km · Kanaya 26 km · Kakegawa 26 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 Omaezaki (34.5988°, 138.2193°, elevation 43 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).