Sukagawa weather in September

In September, Sukagawa sees average daytime highs of 24°C and overnight lows near 17°C, with 171 mm of rain across 14.5 wet days and about 12.3 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 21°C by the end. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels humid.

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 Sukagawa's 10th-clearest and 9th-windiest month. For the whole year in context, see Sukagawa's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
171 mm
14.5 wet days
Daylight
12 h 12 min
5:26 AM – 5:40 PM
Cloud cover
72%
10th clearest
Wind
8 km/h
9th windiest
Solar energy
3.6 kWh/m²
Travel score
5.8
out of 10

Sukagawa is city in Fukushima Prefecture, Japan.

Density
268/km²
people per km²
Founded
1954

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 21°C by the end.

A typical September day in Sukagawa reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72518
82518
92518
102518
112518
122517
132417
142417
152417
162417
172416
182316
192316
202316
212315
222215
232215
242215
252215
262214
272114
282114
292114
302114

How September really feels in Sukagawa

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.

Sukagawa 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 / -3°547.26.79.70.0
Feb / -3°497.25.110.60.1
Mar / 91114.911.71.6
Apr15° / 10311.51.312.94.2
May20° / 10°11512.30145.9
Jun23° / 15°13114.4014.55.7
Jul27° / 19°18717.6014.35.1
Aug28° / 20°14115.1013.45.2
Sep24° / 17°17114.5012.35.8
Oct18° / 10°15011.60115.4
Nov12° / 758.10.3103.4
Dec / -1°497.93.59.50.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 69%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
33070
43169
53169
63169
73169
83169
93169
103169
113169
123169
133169
143169
153169
163169
173169
183169
193070
203169
213169
223169
233169
243268
253268
263268
273268
283466
293367
303466

Chance of precipitation in September

Any precipitation

Sukagawa gets around 171 mm of rain over 14.5 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 49% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
152
253
353
452
552
652
751
851
951
1050
1150
1250
1349
1449
1548
1648
1748
1848
1947
2047
2147
2247
2347
2446
2546
2646
2746
2845
2945
3045

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1210313918
2210323917
3210333916
4311333815
5312333714
6413333713
7514333612
8615333511
9716333411
10817333210
1191932319
12102032308
13122131288
14132231277
15152430256
16172530235
17192629215
18212828204
19232927183
20253026163
21273125143
22303124132
23323223112
24343322102
2535342181
2637352071
2739351961
2840361851
2942371651
3044371540

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:13 AM to 5:38 AM, and sunset from 6:03 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:136:03
212.85:146:02
312.85:156:00
412.75:165:59
512.75:165:57
612.65:175:56
712.65:185:54
812.65:195:53
912.55:205:51
1012.55:215:49
1112.45:215:48
1212.45:225:46
1312.45:235:45
1412.35:245:43
1512.35:255:41
1612.25:265:40
1712.25:275:38
1812.25:275:37
1912.15:285:35
2012.15:295:33
2112.05:305:32
2212.05:315:30
2311.95:325:29
2411.95:335:27
2511.95:335:26
2611.85:345:24
2711.85:355:22
2811.75:365:21
2911.75:375:19
3011.75:385:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.6 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 5.35 kWh/m² in May across the year — September's 3.6 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.2Moderate
Planning a trip in September

Hazard calendar for Sukagawa

In seasonPeak

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

Sukagawa 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 Sukagawa?

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
4.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Sukagawa for sightseeing.

What to pack for Sukagawa in September

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

In September, Sukagawa sees daytime highs around 24°C and nights near 17°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Sukagawa in September

The nearest coast averages about 23°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 63 km away) is warmest in August at about 24°C and coldest in March near 12°C.

It's comfortable for a long swim from Jul 1 to Oct 22 — about 3.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug24Refreshing
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Sukagawa in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sukagawa peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 17UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Low

Air quality in Sukagawa 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 Sukagawa is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug12Good
Sep11Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Sukagawa?

Sukagawa sits at 37.3°N, 140.4°E, 261 m above sea level, in Japan. The nearest listed city is Yabuki, 11 km away.

Topography around Sukagawa

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

Within 3 km, the terrain around Sukagawa has only modest variations in elevation — a maximum elevation change of 62 m around an average of 257 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 729 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,029 m.

The land around Sukagawa is covered by artificial surfaces (34%), trees (33%) and cropland (29%) within 3 km, trees (53%) and cropland (29%) within 16 km, and trees (72%) within 80 km.

3 km
62 m
16 km
729 m
80 km
2,029 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Yabuki 11 km · Kōriyama 13 km · Ishikawa 16 km · Miharu 19 km · Shirakawa 21 km · Kumakura 24 km · Funehikimachi-funehiki 25 km · Tamura 25 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 Sukagawa (37.2833°, 140.3833°, elevation 261 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).