1,188 places · 1991–2020 normals

Japan in
September.

Day, night and rain figures are the measured September normals from each place’s qualifying NOAA station. Open a place for that month’s full answer.

Read these as long-term planning evidence, not a forecast. Compare daytime and overnight temperature together, then use rainfall and wet-day frequency to judge how often outdoor plans may need flexibility. Mountain, coastal and island conditions can differ sharply over short distances, so the linked place page and its station distance matter more than the country average. Before booking, check current local forecasts, seasonal closures, daylight, transport and any weather warnings. Data collection uses the 1991–2020 station-normal period; the published evidence was rechecked on 3 September 2026.

Use the table to shortlist places, then open each place page to compare the reporting station, distance and all twelve months. A small country table can contain only a few qualifying stations; that is a coverage limit, not evidence that other places share the same conditions.

Jan Feb Mar Apr May Jun Jul AugSepOct Nov Dec

September normals for the largest listed places in Japan
Place	Day	Night	Rain	Wet days	Comfort
TokyoTokyo	27.7°C	21°C	268 mm	14.3	34
YokohamaKanagawa	27.5°C	20.9°C	293 mm	13	33
OsakaOsaka	29.5°C	21.6°C	148 mm	10	48
NagoyaAichi	29°C	20.7°C	228 mm	12.3	38
SapporoHokkaido	22.9°C	14.5°C	143 mm	11	73
FukuokaFukuoka	28.5°C	21.3°C	192 mm	11	44
KawasakiKanagawa	27.5°C	20.9°C	293 mm	13	33
KobeHyōgo	28.8°C	21.6°C	164 mm	9.8	48
KyotoKyoto	29.3°C	20.4°C	224 mm	11.1	39
SaitamaSaitama	27.7°C	21°C	268 mm	14.3	34
HiroshimaHiroshima	29.2°C	20.8°C	177 mm	9.9	47
SendaiMiyagi	25.1°C	17.9°C	213 mm	14.1	56
ChibaChiba	27.6°C	20.9°C	211 mm	11.4	45
KitakyushuFukuoka	27.8°C	22.2°C	183 mm	11.1	46
SetagayaTokyo	27.7°C	21°C	268 mm	14.3	34
SakaiOsaka	29.5°C	21.6°C	148 mm	10	48
NiigataNiigata	26.5°C	19.4°C	158 mm	13.2	57
ŌtaTokyo	27.7°C	21°C	268 mm	14.3	34
AiharaKanagawa	27.5°C	20.9°C	293 mm	13	33
OkayamaOkayama	28.7°C	20.3°C	155 mm	8.9	53
SagamiharaKanagawa	27.5°C	20.9°C	293 mm	13	33
EdogaweTokyo	27.7°C	21°C	268 mm	14.3	34
AdachiTokyo	27.7°C	21°C	268 mm	14.3	34
ShizuokaShizuoka	28.5°C	20.9°C	288 mm	12.3	31
HonchōChiba	27.6°C	20.9°C	211 mm	11.4	45
KawaguchiSaitama	27.7°C	21°C	268 mm	14.3	34
KagoshimaKagoshima	30.3°C	22.9°C	273 mm	12.1	23
SuginamiIbaraki	26.4°C	18.2°C	189 mm	12.3	56
ItabashiTokyo	27.7°C	21°C	268 mm	14.3	34
HachiōjiTokyo	27.5°C	20.9°C	293 mm	13	33
UtsunomiyaTochigi	27.2°C	18.8°C	239 mm	13.8	44
MatsuyamaEhime	29°C	20.6°C	160 mm	9	51
MatsudoChiba	27.7°C	21°C	268 mm	14.3	34
IchikawaChiba	27.7°C	21°C	268 mm	14.3	34
HigashiosakaOsaka	29.5°C	21.6°C	148 mm	10	48
NishinomiyaHyōgo	28.8°C	21.6°C	164 mm	9.8	48
KurashikiOkayama	28.7°C	20.3°C	155 mm	8.9	53
KanazawaIshikawa	27.1°C	19.7°C	275 mm	13.1	39
AmagasakiHyōgo	29.5°C	21.6°C	148 mm	10	48
KatsushikaTokyo	27.7°C	21°C	268 mm	14.3	34
FujisawaKanagawa	27.5°C	20.9°C	293 mm	13	33
KashiwaChiba	27.7°C	21°C	268 mm	14.3	34
MachidaTokyo	27.5°C	20.9°C	293 mm	13	33
ToyotaAichi	29°C	20.7°C	228 mm	12.3	38
TakamatsuKagawa	28.8°C	20.6°C	198 mm	11.5	44
ToyamaToyama	27.1°C	18.8°C	250 mm	13.4	44
NagasakiNagasaki	28.9°C	21.6°C	225 mm	10.7	39
HirakataOsaka	29.5°C	21.6°C	148 mm	10	48
GifuGifu	29.3°C	20.3°C	244 mm	11.5	36
ToyonakaOsaka	29.5°C	21.6°C	148 mm	10	48
MiyazakiMiyazaki	29°C	20.9°C	365 mm	13.7	17
SuitaOsaka	29.5°C	21.6°C	148 mm	10	48
OkazakiAichi	29°C	20.7°C	228 mm	12.3	38
IchinomiyaAichi	29.3°C	20.3°C	244 mm	11.5	36
TakasakiGunma	27.5°C	18.8°C	266 mm	15.2	38
NaganoNagano	26.2°C	16.9°C	141 mm	9.7	68
KawagoeSaitama	28.1°C	19.4°C	224 mm	13.3	43
TakatsukiOsaka	29.5°C	21.6°C	148 mm	10	48
ShinjukuTokyo	27.7°C	21°C	268 mm	14.3	34
KoshigayaSaitama	27.7°C	21°C	268 mm	14.3	34
ŌtsuShiga	29.3°C	20.4°C	224 mm	11.1	39
NakanoTokyo	27.7°C	21°C	268 mm	14.3	34
TokorozawaSaitama	27.7°C	21°C	268 mm	14.3	34
MaebashiGunma	27.5°C	18.8°C	266 mm	15.2	38
KitaTokyo	27.7°C	21°C	268 mm	14.3	34
KochiKochi	29.6°C	21°C	402 mm	13.5	10
NahaOkinawa	30.6°C	25.7°C	287 mm	12.2	15
KasugaiAichi	29°C	20.7°C	228 mm	12.3	38
AkashiHyōgo	28.8°C	21.6°C	164 mm	9.8	48
ToshimaTokyo	27.7°C	21°C	268 mm	14.3	34

Japan inSeptember.

Japan in
September.