Nikaho weather in September

In September, Nikaho sees average daytime highs of 24°C and overnight lows near 18°C, with 180 mm of rain across 16 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 4th-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 20% 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 Nikaho's 5th-clearest and 9th-windiest month. For the whole year in context, see Nikaho's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
180 mm
16 wet days
Daylight
12 h 18 min
5:27 AM – 5:42 PM
Cloud cover
68%
5th clearest
Wind
9 km/h
9th windiest
Solar energy
3.9 kWh/m²
Travel score
5.6
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 Nikaho reaches about 24°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12620
22620
32620
42620
52620
62620
72619
82519
92519
102519
112519
122519
132518
142418
152418
162418
172417
182317
192317
202317
212317
222316
232216
242216
252216
262215
272215
282115
292115
302115

How September really feels in Nikaho

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.

Nikaho weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°15924.822.69.60.0
Feb / -1°11720.81810.50.0
Mar / 12819.71111.70.6
Apr13° / 114151.7133.1
May18° / 11°12313.9014.15.3
Jun22° / 16°13713014.76.0
Jul26° / 20°22417.7014.55.4
Aug28° / 22°20416.6013.55.2
Sep24° / 18°18016012.35.6
Oct18° / 12°17115.90114.9
Nov11° / 17319.82.89.82.2
Dec / 18424.115.29.30.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53664
63664
73763
83763
93763
103763
113664
123664
133664
143763
153664
163664
173763
183664
193664
203664
213664
223664
233664
243664
253664
263763
273763
283763
293763
303763

Chance of precipitation in September

Any precipitation

Nikaho gets around 180 mm of rain over 16 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 55% and peaks near 57% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
156
256
356
456
556
657
757
857
957
1056
1156
1256
1356
1456
1555
1655
1755
1854
1954
2053
2153
2252
2352
2452
2552
2652
2752
2852
2952
3052

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 26% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1192436282
2192537262
31102636252
41102736232
51112836222
61122936211
71133035191
82143035181
93163034171
104173033151
115183032141
126203031130
137213030120
149232928110
1510242927100
161226282590
171427282380
181628272270
191830272060
202031261850
212232251740
222432251540
232633241330
242834241220
253034231020
26323523910
27343522810
28363621610
29383620600
30403619500

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:13 AM to 5:40 AM, and sunset from 6:07 PM to 5:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:136:07
212.95:146:05
312.85:156:04
412.85:166:02
512.75:176:01
612.75:185:59
712.65:195:57
812.65:195:56
912.65:205:54
1012.55:215:52
1112.55:225:51
1212.45:235:49
1312.45:245:47
1412.35:255:46
1512.35:265:44
1612.35:275:42
1712.25:285:40
1812.25:295:39
1912.15:305:37
2012.15:315:35
2112.05:325:34
2212.05:335:32
2311.95:345:30
2411.95:355:29
2511.95:365:27
2611.85:375:25
2711.85:375:24
2811.75:385:22
2911.75:395:20
3011.65:405:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.9 kWh/m².

For context, solar energy here swings from a low near 1.62 kWh/m² to a high of 5.52 kWh/m² in June across the year — September's 3.9 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.2Bright
54.2Bright
64.2Bright
74.1Bright
84.1Bright
94.0Bright
104.0Bright
114.0Moderate
124.0Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Nikaho

In seasonPeak

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

Nikaho 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 Nikaho?

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

5.6
Sightseeing
2nd-best month of the year
4.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Nikaho for sightseeing.

What to pack for Nikaho in September

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

In September, Nikaho sees daytime highs around 24°C and nights near 18°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Nikaho 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 13 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 Nikaho 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 Nikaho peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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 9Jan 10UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun7Very high
Jul6High
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Nikaho 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 Nikaho is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun15Moderate
Jul13Moderate
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Nikaho?

Nikaho sits at 39.3°N, 139.9°E, 47 m above sea level, in Japan. The nearest listed city is Yurihonjō, 17 km away.

Topography around Nikaho

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

Within 3 km, the terrain around Nikaho has only modest variations in elevation — a maximum elevation change of 127 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,122 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,210 m.

The land around Nikaho is covered by trees (30%), cropland (27%) and water (25%) within 3 km, water (52%) and trees (36%) within 16 km, and trees (50%) and water (38%) within 80 km.

3 km
127 m
16 km
1,122 m
80 km
2,210 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Yurihonjō 17 km · Sakata 40 km · Shonai 47 km · Yuzawa 50 km · Ōmagari 51 km · Daisen 51 km · Akita 52 km · Yokote 53 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 Nikaho (39.2708°, 139.9395°, elevation 47 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).