Rokugō weather in September

In September, Rokugō sees average daytime highs of 24°C and overnight lows near 16°C, with 152 mm of rain across 14.2 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 3rd-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 19% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Rokugō's 6th-clearest and 10th-windiest month. For the whole year in context, see Rokugō's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
152 mm
14.2 wet days
Daylight
12 h 18 min
5:25 AM – 5:40 PM
Cloud cover
69%
6th clearest
Wind
7 km/h
10th windiest
Solar energy
3.71 kWh/m²
Travel score
5.8
out of 10

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 Rokugō reaches about 24°C in the afternoon and slips back to 16°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°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
52618
62518
72518
82518
92518
102517
112517
122417
132417
142416
152416
162416
172316
182315
192315
202315
212315
222214
232214
242214
252214
262113
272113
282113
292113
302112

How September really feels in Rokugō

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.

Rokugō 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 / -5°11021.121.69.50.0
Feb / -5°90171710.50.0
Mar / -1°11517.912.111.70.7
Apr13° / 11215.22.3133.3
May19° / 10°12113.5014.15.5
Jun23° / 15°13112.8014.76.0
Jul26° / 19°20617014.55.4
Aug27° / 20°17316.2013.55.4
Sep24° / 16°15214.2012.35.8
Oct17° / 14114.10115.0
Nov11° / 12917.63.59.82.1
Dec / -2°1302115.99.30.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33466
43466
53466
63466
73466
83466
93565
103565
113565
123565
133565
143565
153466
163466
173466
183466
193466
203565
213565
223664
233565
243565
253664
263664
273664
283664
293763
303763

Chance of precipitation in September

Any precipitation

Rokugō gets around 152 mm of rain over 14.2 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 54% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
154
254
354
453
553
653
752
852
952
1051
1151
1251
1350
1450
1549
1648
1748
1847
1947
2046
2145
2245
2345
2445
2545
2645
2745
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 27% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11122837211
21132937201
31133037181
41143136171
52153235161
62163235141
73173334131
84183333120
95193332110
106203330100
11722332990
12923332780
131024322670
141225312470
151427312360
161628302150
171829291950
182130281840
192331261630
202632251430
212832241330
223133231120
233333221020
24353421820
25383420710
26403419610
27423418510
28453417410
29473316400
30493315300

Wind in September

Winds average 7 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.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:10 AM to 5:38 AM, and sunset from 6:05 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:106:05
212.95:116:03
312.85:126:01
412.85:136:00
512.75:145:58
612.75:155:57
712.65:165:55
812.65:175:53
912.65:185:52
1012.55:195:50
1112.55:205:48
1212.45:215:47
1312.45:225:45
1412.35:235:43
1512.35:245:41
1612.35:255:40
1712.25:255:38
1812.25:265:36
1912.15:275:35
2012.15:285:33
2112.05:295:31
2212.05:305:30
2311.95:315:28
2411.95:325:26
2511.95:335:25
2611.85:345:23
2711.85:355:21
2811.75:365:19
2911.75:375:18
3011.65:385:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.71 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 5.31 kWh/m² in May across the year — September's 3.71 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.7Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.4Moderate
283.4Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Rokugō

In seasonPeak

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

Rokugō 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 Rokugō?

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 Rokugō for sightseeing.

What to pack for Rokugō in September

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

In September, Rokugō sees daytime highs around 24°C and nights near 16°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Rokugō 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 58 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 27 to Oct 24 — about 3.9 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul22Refreshing
Aug26Warm
Sep25Warm
Oct21Refreshing
Nov18Cool
Dec14Bracing

UV index in Rokugō in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rokugō peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Jan 11UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Rokugō 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 Rokugō is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun15Moderate
Jul13Moderate
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Rokugō?

Rokugō sits at 39.4°N, 140.6°E, 59 m above sea level, in Japan. The nearest listed city is Daisen, 6.0 km away.

Topography around Rokugō

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

Within 3 km, the terrain around Rokugō has only modest variations in elevation — a maximum elevation change of 100 m around an average of 50 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,036 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,210 m.

The land around Rokugō is covered by cropland (76%) within 3 km, trees (52%) and cropland (37%) within 16 km, and trees (72%) within 80 km.

3 km
100 m
16 km
1,036 m
80 km
2,210 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Daisen 6.0 km · Ōmagari 7.0 km · Yokote 11 km · Yuzawa 28 km · Semboku 37 km · Yurihonjō 42 km · Shizukuishi 48 km · Hanamaki 49 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 Rokugō (39.4167°, 140.55°, elevation 59 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).