Mochibaru weather in September

In September, Mochibaru sees average daytime highs of 28°C and overnight lows near 22°C, with 276 mm of rain across 16.9 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 29°C in the first days to 26°C by the end. The sky is clear or mostly clear about 26% 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 Mochibaru's 9th-clearest and 9th-windiest month. For the whole year in context, see Mochibaru's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
276 mm
16.9 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
65%
9th clearest
Wind
10 km/h
9th windiest
Solar energy
4.14 kWh/m²
Travel score
5.1
out of 10

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 Mochibaru reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 30°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12924
22923
32923
42923
52923
62923
72923
82923
92923
102823
112823
122822
132822
142822
152822
162822
172822
182722
192721
202721
212721
222721
232721
242721
252620
262620
272620
282620
292620
302620

How September really feels in Mochibaru

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.

Mochibaru 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 daysDaylight (hours)Travel score
Jan12° / 817.210.23.4
Feb13° / 978.310.83.8
Mar16° / 15612.411.84.9
Apr20° / 12°17511.912.85.9
May23° / 16°20312.613.66.3
Jun26° / 20°41319.8144.8
Jul30° / 24°25118.213.94.1
Aug30° / 24°22617.913.24.0
Sep28° / 22°27616.912.25.1
Oct24° / 17°16610.811.26.8
Nov19° / 11°1098.410.46.3
Dec14° / 816.4104.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% 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 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64060
74060
84060
94060
104060
114159
124258
134258
144258
154357
164357
174357
184357
194456
204357
214456
224357
234357
244456
254456
264456
274456
284456
294555
304555

Chance of precipitation in September

Any precipitation

Mochibaru gets around 276 mm of rain over 16.9 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 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
162
262
362
462
562
662
761
861
960
1059
1158
1257
1356
1455
1555
1654
1754
1853
1953
2052
2152
2251
2351
2450
2549
2649
2748
2848
2947
3046

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 76% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1003156121
2003176020
3004185919
4004196017
5014215816
6015225715
7015235714
8026245513
9126255412
10127265311
11138275110
12149284910
13241028479
14251129458
15261329438
16361429417
17371629397
18381729376
19491829356
204102029335
214102128315
224112228295
235122328284
245132428264
255142428253
265152528243
275162528233
286172628212
296192627202
307202627192

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2911calm
3011calm

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 6:13 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
212.65:556:34
312.65:566:33
412.65:576:32
512.65:576:30
612.55:586:29
712.55:586:28
812.55:596:26
912.46:006:25
1012.46:006:24
1112.46:016:22
1212.36:026:21
1312.36:026:20
1412.36:036:18
1512.26:036:17
1612.26:046:16
1712.26:056:14
1812.16:056:13
1912.16:066:11
2012.16:076:10
2112.06:076:09
2212.06:086:07
2312.06:086:06
2411.96:096:05
2511.96:106:03
2611.96:106:02
2711.86:116:01
2811.86:125:59
2911.86:125:58
3011.76:135:57

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 2.76 kWh/m² to a high of 5.14 kWh/m² in July across the year — September's 4.14 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.0Bright
224.0Bright
234.0Bright
244.0Moderate
254.0Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Mochibaru

In seasonPeak

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

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

Mochibaru'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 Mochibaru?

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

5.1
Sightseeing
5th-best month of the year
5.6
Beach & pool
1st-best month of the year

September is a reasonable time to visit Mochibaru for sightseeing.

What to pack for Mochibaru in September

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

In September, Mochibaru sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. About 17 days see rain.

light clothesrain gear

Sea temperature near Mochibaru 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 42 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 14 to Jan 4 — about 8.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar19Cool
Apr20Refreshing
May22Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct26Warm
Nov23Refreshing
Dec21Refreshing

UV index in Mochibaru 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 Mochibaru peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 11Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Mochibaru 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 Mochibaru is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodModerateApr 1421 µg/m³Sep 1911 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun16Moderate
Jul11Good
Aug12Moderate
Sep11Good
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Mochibaru?

Mochibaru sits at 31.8°N, 131.1°E, 151 m above sea level, in Japan. The nearest listed city is Miyakonojō, 6.0 km away.

Topography around Mochibaru

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

Within 3 km, the terrain around Mochibaru has only modest variations in elevation — a maximum elevation change of 188 m around an average of 170 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 987 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,679 m.

The land around Mochibaru is covered by cropland (42%), artificial surfaces (28%) and trees (27%) within 3 km, trees (70%) within 16 km, and trees (57%) and water (34%) within 80 km.

3 km
188 m
16 km
987 m
80 km
1,679 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Miyakonojō 6.0 km · Sueyoshichō-ninokata 16 km · Soo 18 km · Nichinan 28 km · Kobayashi 29 km · Shibushi 31 km · Kushima 32 km · Honjō 32 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 Mochibaru (31.7551°, 131.1298°, elevation 151 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).