Ogi weather in September

In September, Ogi sees average daytime highs of 28°C and overnight lows near 21°C, with 189 mm of rain across 12.3 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 26°C by the end. The sky is clear or mostly clear about 34% 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 Ogi's 3rd-clearest and 8th-windiest month. For the whole year in context, see Ogi's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
189 mm
12.3 wet days
Daylight
12 h 12 min
6:07 AM – 6:20 PM
Cloud cover
59%
3rd clearest
Wind
8 km/h
8th windiest
Solar energy
4.19 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 30°C in the first days to 26°C by the end.

A typical September day in Ogi reaches about 28°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 25°C and 31°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13023
23023
33023
42923
52923
62922
72922
82922
92922
102922
112922
122822
132821
142821
152821
162821
172821
182820
192720
202720
212720
222720
232719
242719
252619
262619
272619
282619
292618
302618

How September really feels in Ogi

Once humidity and wind are folded in, September averages 4 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
4
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.

Ogi 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
Jan10° / 6280.8102.2
Feb11° / 778.30.410.82.7
Mar15° / 12510.90.111.74.2
Apr19° / 11°14510.7012.86.0
May24° / 15°16410.3013.76.7
Jun26° / 20°34415.9014.25.4
Jul30° / 24°30917.60144.1
Aug31° / 24°18114.7013.23.9
Sep28° / 21°18912.3012.25.7
Oct23° / 15°1087.3011.27.3
Nov17° / 10°938010.35.8
Dec12° / 717.40.19.83.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34753
44753
54753
64753
74852
84852
95050
105050
115050
125050
135149
145149
155149
165149
175149
185149
195149
205149
215248
225248
235248
245248
255248
265149
275248
285248
295248
305347

Chance of precipitation in September

Any precipitation

Ogi gets around 189 mm of rain over 12.3 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 40% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
146
246
346
445
545
645
745
844
944
1044
1144
1243
1343
1442
1541
1641
1740
1839
1939
2038
2137
2236
2336
2435
2534
2633
2733
2832
2931
3031

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1016235416
2017245414
3018265213
4019275112
50110285110
6021029499
7021130489
8021231468
9031432447
10141532427
11141633406
12151733386
13161833365
14271933345
15282132324
16392232314
173102332293
184112431273
194122530263
205132630242
215142729232
226152829212
236162828192
247182927181
258192927161
268203026151
279213025141
2810223025121
2911233024111
3012242923101

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 9 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
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
299calm
309calm

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 5:57 AM to 6:17 AM, and sunset from 6:41 PM to 6:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:576:41
212.75:586:39
312.75:596:38
412.65:596:37
512.66:006:35
612.66:016:34
712.56:016:32
812.56:026:31
912.46:036:30
1012.46:036:28
1112.46:046:27
1212.36:056:25
1312.36:056:24
1412.36:066:22
1512.26:076:21
1612.26:076:20
1712.26:086:18
1812.16:096:17
1912.16:106:15
2012.16:106:14
2112.06:116:12
2212.06:126:11
2312.06:126:10
2411.96:136:08
2511.96:146:07
2611.86:146:05
2711.86:156:04
2811.86:166:03
2911.76:176:01
3011.76:176:00

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.19 kWh/m².

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 5.28 kWh/m² in May across the year — September's 4.19 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.0Bright
254.0Bright
264.0Bright
274.0Moderate
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Ogi

In seasonPeak

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

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

Ogi's rainy season runs May–September, 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 Ogi?

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

5.7
Sightseeing
5th-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Ogi in September

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

In September, Ogi sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Ogi 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 24 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 May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Ogi 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 Ogi peaks around July 20 at about 10 (very high) — 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 highModerateJul 20UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Ogi 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 Ogi is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ogi?

Ogi sits at 33.3°N, 130.2°E, 7 m above sea level, in Japan. The nearest listed city is Taku, 8.0 km away.

Topography around Ogi

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

Within 3 km, the terrain around Ogi has only modest variations in elevation — a maximum elevation change of 214 m around an average of 28 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,041 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,455 m.

The land around Ogi is covered by cropland (51%), trees (24%) and artificial surfaces (22%) within 3 km, trees (49%) and cropland (30%) within 16 km, and water (43%) and trees (40%) within 80 km.

3 km
214 m
16 km
1,041 m
80 km
1,455 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Taku 8.0 km · Saga 11 km · Higashigō 11 km · Kanzakimachi-kanzaki 17 km · Ōkawa 19 km · Takeo 19 km · Ishinari 21 km · Kashima 22 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 Ogi (33.2803°, 130.195°, elevation 7 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).