Haramachi weather in September

In September, Haramachi sees average daytime highs of 27°C and overnight lows near 20°C, with 187 mm of rain across 13.6 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 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 32% 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 Haramachi's 8th-clearest and 8th-windiest month. For the whole year in context, see Haramachi's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
187 mm
13.6 wet days
Daylight
12 h 12 min
5:57 AM – 6:09 PM
Cloud cover
61%
8th clearest
Wind
8 km/h
8th windiest
Solar energy
4.31 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 28°C in the first days to 25°C by the end.

A typical September day in Haramachi reaches about 27°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°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)
12923
22923
32822
42822
52822
62822
72822
82822
92822
102821
112721
122721
132721
142721
152721
162720
172620
182620
192620
202620
212620
222619
232519
242519
252519
262519
272518
282518
292418
302418

How September really feels in Haramachi

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.

Haramachi 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
Jan / 6911.33.3101.4
Feb / 7910.42.910.71.8
Mar13° / 11812.30.711.73.4
Apr18° / 10°133110.112.85.5
May22° / 15°15411.1013.76.4
Jun25° / 19°26815.7014.25.6
Jul29° / 23°23916.80144.7
Aug30° / 24°15615.8013.34.5
Sep27° / 20°18713.6012.25.9
Oct22° / 15°1419.4011.16.9
Nov16° / 839.1010.25.3
Dec11° / 8311.41.99.82.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24555
34555
44456
54456
64555
74555
84555
94654
104654
114654
124753
134852
144753
154852
164852
174951
184852
194951
204951
215050
224951
234951
245050
254951
265050
275050
285050
295050
305149

Chance of precipitation in September

Any precipitation

Haramachi gets around 187 mm of rain over 13.6 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 45% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
152
252
352
452
552
652
751
851
950
1049
1148
1248
1346
1445
1544
1644
1743
1842
1942
2041
2141
2240
2340
2440
2539
2639
2739
2839
2939
3039

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101927621
201928611
3021029581
4021130561
5021231541
6031232521
7031333491
8041434471
9051535441
10161635421
11171736391
12181736371
131101836341
142111936321
152122035291
163132135271
173152234251
184162333230
195172432210
205182632190
216192630180
227202729160
238212829150
248222928130
259232927120
2610233026110
2711243025100
281224302490
291325312380
301426312270

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:46 AM to 6:07 AM, and sunset from 6:31 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:466:31
212.75:476:29
312.75:486:28
412.65:496:27
512.65:496:25
612.65:506:24
712.55:516:22
812.55:516:21
912.55:526:19
1012.45:536:18
1112.45:536:17
1212.35:546:15
1312.35:556:14
1412.35:566:12
1512.25:566:11
1612.25:576:09
1712.25:586:08
1812.15:586:06
1912.15:596:05
2012.16:006:04
2112.06:016:02
2212.06:016:01
2312.06:025:59
2411.96:035:58
2511.96:035:56
2611.86:045:55
2711.86:055:54
2811.86:065:52
2911.76:065:51
3011.76:075:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 5.57 kWh/m² in May across the year — September's 4.31 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Haramachi

In seasonPeak

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

Haramachi 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 Haramachi?

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

5.9
Sightseeing
3rd-best month of the year
5.9
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Haramachi for sightseeing.

What to pack for Haramachi in September

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

In September, Haramachi sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Haramachi in September

The nearest coast averages about 25°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 19 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 12 to Nov 17 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Haramachi 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 Haramachi peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Haramachi 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 Haramachi is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1523 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Haramachi?

Haramachi sits at 33.8°N, 132.8°E, 54 m above sea level, in Japan. The nearest listed city is Masaki-chō, 8.0 km away.

Topography around Haramachi

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

Within 3 km, the terrain around Haramachi has significant variations in elevation — a maximum elevation change of 394 m around an average of 104 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,306 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Haramachi is covered by trees (48%) and artificial surfaces (31%) within 3 km, trees (63%) within 16 km, and trees (53%) and water (41%) within 80 km.

3 km
394 m
16 km
1,306 m
80 km
1,895 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Masaki-chō 8.0 km · Matsuyama 8.0 km · Iyo 8.0 km · Tōon 10 km · Hōjō 23 km · Shinagawa 25 km · Uchiko 28 km · Ōzu 37 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 Haramachi (33.7704°, 132.7898°, elevation 54 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).