Kobayashi weather in September

In September, Kobayashi sees average daytime highs of 27°C and overnight lows near 19°C, with 229 mm of rain across 16.2 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 29°C in the first days to 26°C by the end. The sky is clear or mostly clear about 23% of the time in September, and the air most often feels muggy.

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 Kobayashi's 8th-clearest and 10th-windiest month. For the whole year in context, see Kobayashi's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
229 mm
16.2 wet days
Daylight
12 h 12 min
6:05 AM – 6:16 PM
Cloud cover
66%
8th clearest
Wind
6 km/h
10th windiest
Solar energy
3.97 kWh/m²
Travel score
5.3
out of 10

Kobayashi is city in Miyazaki Prefecture, Japan.

Density
78/km²
people per km²
Founded
2006

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 26°C by the end.

A typical September day in Kobayashi reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12922
22921
32921
42921
52921
62821
72821
82821
92821
102820
112820
122820
132820
142820
152720
162719
172719
182719
192719
202719
212719
222618
232618
242618
252618
262618
272617
282617
292517
302517

How September really feels in Kobayashi

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Kobayashi 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° / 787.30.710.12.4
Feb11° / 1018.70.510.83.0
Mar15° / 15812.70.111.84.3
Apr20° / 18312.3012.85.7
May23° / 14°21212.5013.66.2
Jun25° / 18°46420.6014.14.8
Jul29° / 22°29819.8013.94.0
Aug30° / 23°20519.1013.24.0
Sep27° / 19°22916.2012.25.3
Oct23° / 13°1319.8011.26.9
Nov17° / 1048.2010.45.9
Dec12° / 786.60.19.93.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53862
63664
73664
83664
93664
103862
113862
123961
133961
143961
154060
164060
174159
184159
194258
204159
214258
224357
234357
244357
254357
264357
274357
284456
294456
304456

Chance of precipitation in September

Any precipitation

Kobayashi gets around 229 mm of rain over 16.2 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 53% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
163
263
363
462
562
661
761
860
960
1059
1158
1257
1356
1455
1554
1653
1752
1851
1950
2049
2148
2247
2346
2445
2545
2644
2743
2843
2942
3042

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 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 (%)
100730612
200832582
301833562
401934551
501936531
6011037511
7121138481
8121138461
9131239451
10241239431
11251339411
12261439390
13371538370
14481538350
15491637330
165111736310
175121836290
186131935270
197152034250
207162133230
218172132220
228182231200
239192330180
2410202429170
2510212529150
2611222628140
2712222627120
2812232726110
2913232826100
3015242724100

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:55 AM to 6:14 AM, and sunset from 6:36 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:556:36
212.75:566:35
312.65:566:34
412.65:576:32
512.65:586:31
612.55:586:30
712.55:596:28
812.56:006:27
912.46:006:26
1012.46:016:24
1112.46:016:23
1212.36:026:22
1312.36:036:20
1412.36:036:19
1512.26:046:18
1612.26:056:16
1712.26:056:15
1812.16:066:13
1912.16:076:12
2012.16:076:11
2112.06:086:09
2212.06:086:08
2312.06:096:07
2411.96:106:05
2511.96:106:04
2611.96:116:02
2711.86:126:01
2811.86:126:00
2911.86:135:58
3011.76:145:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.97 kWh/m².

For context, solar energy here swings from a low near 2.64 kWh/m² to a high of 4.98 kWh/m² in May across the year — September's 3.97 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Moderate
184.0Moderate
194.0Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Kobayashi

In seasonPeak

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

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

Kobayashi's rainy season runs May–July, 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 Kobayashi?

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

5.3
Sightseeing
5th-best month of the year
5.6
Beach & pool
1st-best month of the year

September is a reasonable time to visit Kobayashi for sightseeing.

What to pack for Kobayashi in September

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

In September, Kobayashi sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. About 16 days see rain.

light clothesrain gear

Sea temperature near Kobayashi in September

The nearest coast averages about 27°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 59 km away) is warmest in August at about 28°C and coldest in February near 16°C.

It's comfortable for a long swim from May 16 to Dec 4 — about 6.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar17Cool
Apr18Cool
May20Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct24Warm
Nov22Refreshing
Dec19Cool

UV index in Kobayashi 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 Kobayashi peaks around June 22 at about 11 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

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

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2025 µg/m³Jul 2214 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar26Moderate
Apr23Moderate
May22Moderate
Jun18Moderate
Jul14Moderate
Aug14Moderate
Sep14Moderate
Oct15Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Kobayashi?

Kobayashi sits at 32.0°N, 131.0°E, 205 m above sea level, in Japan. The nearest listed city is Ebino, 15 km away.

Topography around Kobayashi

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

Within 3 km, the terrain around Kobayashi has only modest variations in elevation — a maximum elevation change of 147 m around an average of 203 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,597 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,715 m.

The land around Kobayashi is covered by trees (39%), cropland (33%) and artificial surfaces (27%) within 3 km, trees (81%) within 16 km, and trees (64%) and water (26%) within 80 km.

3 km
147 m
16 km
1,597 m
80 km
1,715 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ebino 15 km · Miyakonojō 29 km · Mochibaru 29 km · Honjō 33 km · Hitoyoshi 34 km · Kirishima 34 km · Kokubu-matsuki 35 km · Ōkuchi-shinohara 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 Kobayashi (31.9833°, 130.9833°, elevation 205 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).