Hiratachō weather in September

In September, Hiratachō sees average daytime highs of 25°C and overnight lows near 22°C, with 178 mm of rain across 12.9 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 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels muggy.

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 Hiratachō's 7th-clearest and 8th-windiest month. For the whole year in context, see Hiratachō's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
178 mm
12.9 wet days
Daylight
12 h 12 min
5:56 AM – 6:10 PM
Cloud cover
63%
7th clearest
Wind
19 km/h
8th windiest
Solar energy
4.22 kWh/m²
Travel score
6.3
out of 10

Hiratachō is human settlement in Japan.

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 26°C in the first days to 23°C by the end.

A typical September day in Hiratachō reaches about 25°C in the afternoon and slips back to 22°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 27°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12624
22624
32624
42624
52624
62624
72623
82623
92523
102523
112523
122523
132523
142522
152522
162422
172422
182422
192422
202422
212421
222421
232321
242321
252321
262321
272320
282320
292320
302220

Hiratachō 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 daysSnow daysDaylight (hours)Travel score
Jan / 15720.659.91.1
Feb / 11916.43.910.71.2
Mar11° / 12914.61.111.72.4
Apr15° / 11°10710.2012.94.4
May19° / 16°1219.8013.86.0
Jun22° / 20°15511.1014.36.2
Jul26° / 24°19713.3014.16.1
Aug27° / 25°13211.7013.36.2
Sep25° / 22°17812.9012.26.3
Oct20° / 17°10811011.16.2
Nov16° / 13°11213.7010.14.4
Dec11° / 161202.89.72.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34555
44456
54456
64456
74456
84555
94555
104555
114555
124555
134555
144456
154456
164456
174456
184357
194456
204456
214456
224456
234456
244456
254654
264654
274654
284753
294753
304753

Chance of precipitation in September

Any precipitation

Hiratachō gets around 178 mm of rain over 12.9 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 42% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
344
444
544
644
744
844
944
1044
1144
1244
1343
1443
1542
1642
1742
1841
1941
2041
2141
2241
2341
2440
2540
2640
2740
2840
2940
3040

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1018334611
2029344510
3021034449
4021135439
5031235428
6031336417
7041436396
8041636385
9151736375
10161836354
11171936333
12282036323
13292236302
142102335282
153112435261
163132534241
174142633221
185152732201
195172832180
206182931160
216192930150
227213029130
238223028120
249233127100
251025312690
261126312480
271227312370
281328312260
291429312150
301629312050

Wind in September

Winds average 19 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze

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 5:45 AM to 6:08 AM, and sunset from 6:32 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:32
212.75:466:31
312.75:466:29
412.75:476:28
512.65:486:26
612.65:496:25
712.65:506:23
812.55:506:22
912.55:516:20
1012.45:526:19
1112.45:536:17
1212.45:536:16
1312.35:546:14
1412.35:556:13
1512.35:566:11
1612.25:566:10
1712.25:576:08
1812.15:586:07
1912.15:596:05
2012.16:006:04
2112.06:006:02
2212.06:016:01
2312.06:025:59
2411.96:035:58
2511.96:035:56
2611.86:045:55
2711.86:055:53
2811.86:065:52
2911.76:075:50
3011.76:085:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.22 kWh/m².

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.83 kWh/m² in May across the year — September's 4.22 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Bright
264.0Moderate
274.0Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Hiratachō

In seasonPeak

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

Hiratachō 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 Hiratachō?

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

6.3
Sightseeing
1st-best month of the year
5.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Hiratachō for sightseeing.

What to pack for Hiratachō in September

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

In September, Hiratachō sees daytime highs around 25°C and nights near 22°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Hiratachō 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 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 12 to Nov 15 — 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
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Hiratachō 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 Hiratachō peaks around July 19 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateJul 19UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Hiratachō 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 Hiratachō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1222 µg/m³Oct 1310 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb16Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct10Good
Nov12Good
Dec11Good
Location & terrain

Where is Hiratachō?

Hiratachō sits at 35.4°N, 132.8°E, -1 m above sea level, in Japan. The nearest listed city is Izumo, 9.0 km away.

Topography around Hiratachō

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

Within 3 km, the terrain around Hiratachō has significant variations in elevation — a maximum elevation change of 402 m around an average of 25 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 527 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,689 m.

The land around Hiratachō is covered by cropland (39%) and trees (31%) within 3 km, trees (42%) and water (38%) within 16 km, and trees (48%) and water (48%) within 80 km.

3 km
402 m
16 km
527 m
80 km
1,689 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Izumo 9.0 km · Matsue 22 km · Unnan 22 km · Yasugichō 39 km · Ōdachō-ōda 39 km · Sakaiminato 39 km · Yonago 47 km · Mikuriya 62 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 Hiratachō (35.4333°, 132.8167°, elevation -1 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).