Hadano weather in September

In September, Hadano sees average daytime highs of 24°C and overnight lows near 21°C, with 241 mm of rain across 15.5 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 22°C by the end. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels oppressive.

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 Hadano's 9th-clearest and 4th-windiest month. For the whole year in context, see Hadano's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
241 mm
15.5 wet days
Daylight
12 h 12 min
5:31 AM – 5:44 PM
Cloud cover
66%
9th clearest
Wind
13 km/h
4th windiest
Solar energy
3.88 kWh/m²
Travel score
5.8
out of 10

Hadano is city in Kanagawa prefecture, Japan.

Density
1,579/km²
people per km²
Founded
1955

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 22°C by the end.

A typical September day in Hadano reaches about 24°C in the afternoon and slips back to 21°C overnight — a 3°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)
12623
22623
32623
42623
52623
62623
72623
82622
92522
102522
112522
122522
132522
142522
152521
162421
172421
182421
192421
202421
212420
222320
232320
242320
252320
262320
272319
282319
292219
302219

Hadano 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 / 98102.39.91.7
Feb / 10711.32.710.71.7
Mar12° / 18616.31.611.72.6
Apr15° / 11°17614.40.312.94.2
May19° / 15°18113.6013.85.5
Jun22° / 19°23115.9014.35.3
Jul25° / 22°20014.7014.15.8
Aug27° / 24°15413.5013.36.0
Sep24° / 21°24115.5012.25.8
Oct20° / 17°26715.5011.15.5
Nov16° / 12°14113.1010.14.5
Dec11° / 9410.90.39.72.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24258
34258
44258
54159
64159
74159
84060
93961
103961
113961
123961
133961
143961
153961
163961
173862
183763
193763
203763
213763
223664
233664
243664
253664
263664
273664
283664
293664
303763

Chance of precipitation in September

Any precipitation

Hadano gets around 241 mm of rain over 15.5 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 52% and peaks near 55% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
149
250
350
450
551
651
751
851
952
1052
1152
1252
1352
1452
1552
1652
1752
1852
1952
2052
2153
2253
2353
2453
2553
2654
2754
2855
2955
3055

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 64% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101727569
201827568
301828558
401929547
5011029546
6021130525
7021230515
8021331494
9031431474
10041532463
11141632433
12151833412
13161933392
14272033372
15282133342
16292333321
173102433291
184112532261
194132732241
205142832220
216152931190
226163030170
237173130150
248183229130
258193328120
269203427100
271021352690
281022362570
291123362460
301224362350

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 5:19 AM to 5:42 AM, and sunset from 6:06 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:196:06
212.75:206:05
312.75:216:03
412.75:226:02
512.65:226:00
612.65:235:59
712.65:245:58
812.55:255:56
912.55:255:55
1012.45:265:53
1112.45:275:52
1212.45:285:50
1312.35:295:49
1412.35:295:47
1512.35:305:46
1612.25:315:44
1712.25:325:42
1812.15:325:41
1912.15:335:39
2012.15:345:38
2112.05:355:36
2212.05:355:35
2312.05:365:33
2411.95:375:32
2511.95:385:30
2611.85:395:29
2711.85:395:27
2811.85:405:26
2911.75:415:24
3011.75:425:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.88 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.18 kWh/m² in May across the year — September's 3.88 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.4Bright
34.4Bright
44.3Bright
54.3Bright
64.3Bright
74.2Bright
84.2Bright
94.1Bright
104.1Bright
114.1Bright
124.0Bright
134.0Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.8Moderate
183.8Moderate
193.7Moderate
203.7Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.4Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Hadano

In seasonPeak

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

Hadano 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 Hadano?

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

5.8
Sightseeing
2nd-best month of the year
5.0
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Hadano for sightseeing.

What to pack for Hadano in September

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

In September, Hadano sees daytime highs around 24°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Hadano 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 29 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Hadano 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 Hadano peaks around July 20 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 highExtremeVery highHighModerateJul 20UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Hadano 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 Hadano is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Hadano?

Hadano sits at 35.4°N, 139.2°E, 103 m above sea level, in Japan. The nearest listed city is Kamiōi, 8.0 km away.

Topography around Hadano

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

Within 3 km, the terrain around Hadano has significant variations in elevation — a maximum elevation change of 285 m around an average of 137 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,659 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Hadano is covered by artificial surfaces (47%) and trees (44%) within 3 km, trees (54%) and artificial surfaces (24%) within 16 km, and trees (46%) and water (30%) within 80 km.

3 km
285 m
16 km
1,659 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kamiōi 8.0 km · Ninomiya 8.0 km · Isehara 8.0 km · Kanaishima 10 km · Ōiso 10 km · Hiratsuka 11 km · Minamiashigara 12 km · Odawara 14 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 Hadano (35.3711°, 139.2236°, elevation 103 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).