Nanao weather in September

In September, Nanao sees average daytime highs of 27°C and overnight lows near 21°C, with 202 mm of rain across 13.6 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 29°C in the first days to 24°C by the end. The sky is clear or mostly clear about 25% of the time in September, and the air most often feels muggy.

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 Nanao's 7th-clearest and 9th-windiest month. For the whole year in context, see Nanao's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
202 mm
13.6 wet days
Daylight
12 h 12 min
5:39 AM – 5:53 PM
Cloud cover
66%
7th clearest
Wind
10 km/h
9th windiest
Solar energy
4.13 kWh/m²
Travel score
5.7
out of 10

Nanao is city in Ishikawa Prefecture, Japan.

Density
158/km²
people per km²
Founded
2004

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 29°C in the first days to 24°C by the end.

A typical September day in Nanao reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12924
22923
32923
42923
52923
62823
72823
82822
92822
102822
112722
122722
132722
142721
152721
162721
172621
182621
192620
202620
212620
222520
232520
242520
252519
262519
272419
282419
292419
302418

How September really feels in Nanao

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.

Nanao 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 / 122208.79.70.6
Feb / 9516.1710.60.9
Mar11° / 126162.611.72.3
Apr16° / 11612.40.212.94.8
May21° / 14°12011.90146.3
Jun25° / 19°15711.5014.56.3
Jul29° / 23°24615.7014.34.6
Aug31° / 25°16612.3013.44.3
Sep27° / 21°20213.6012.35.7
Oct21° / 15°14913.20116.0
Nov15° / 10°13415.60.1104.0
Dec10° / 13820.54.49.51.6

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 16% of September, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34159
44159
54159
64159
74159
84357
94258
104258
114258
124258
134258
144258
154258
164060
174060
184159
194060
204060
213961
223961
233961
243961
253961
263961
273961
283961
294060
304060

Chance of precipitation in September

Any precipitation

Nanao gets around 202 mm of rain over 13.6 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 45% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
246
347
447
548
648
748
848
948
1048
1148
1247
1347
1446
1546
1645
1744
1844
1943
2043
2143
2243
2343
2443
2543
2643
2743
2844
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011137465
2011238445
3021338434
4021438414
5021639403
6031739383
7031839373
8031939353
9042039333
10152140312
11162339292
12162439282
13272538262
14282738241
153102737221
164112935201
175123034191
185133033171
196153132151
207163231130
218173330120
229193328100
231020342790
241122352580
251223352370
261324352250
271426362050
281527351940
291628351730
301729351630

Wind in September

Winds average 10 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
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:27 AM to 5:51 AM, and sunset from 6:17 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:276:17
212.85:286:15
312.85:296:14
412.75:296:12
512.75:306:11
612.65:316:09
712.65:326:08
812.65:336:06
912.55:346:05
1012.55:346:03
1112.45:356:01
1212.45:366:00
1312.45:375:58
1412.35:385:57
1512.35:395:55
1612.25:395:53
1712.25:405:52
1812.25:415:50
1912.15:425:49
2012.15:435:47
2112.05:445:46
2212.05:455:44
2311.95:455:42
2411.95:465:41
2511.95:475:39
2611.85:485:38
2711.85:495:36
2811.75:505:35
2911.75:515:33
3011.75:515:31

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.13 kWh/m².

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 5.81 kWh/m² in May across the year — September's 4.13 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.5Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.1Bright
184.0Bright
194.0Bright
204.0Moderate
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Nanao

In seasonPeak

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

Nanao 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 Nanao?

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

5.7
Sightseeing
4th-best month of the year
5.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Nanao for sightseeing.

What to pack for Nanao in September

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

In September, Nanao sees daytime highs around 27°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 14 days see rain.

rain gearlight clothes

Sea temperature near Nanao 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 16 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 18 to Nov 3 — about 4.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Cool
Jun20Cool
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Nanao 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 Nanao peaks around August 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Nanao 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 Nanao 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 1621 µg/m³Dec 139 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Nanao?

Nanao sits at 37.0°N, 137.0°E, 2 m above sea level, in Japan. The nearest listed city is Hitoto, 9.0 km away.

Topography around Nanao

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

Within 3 km, the terrain around Nanao has only modest variations in elevation — a maximum elevation change of 108 m around an average of 16 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 551 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,981 m.

The land around Nanao is covered by water (31%), trees (27%) and artificial surfaces (24%) within 3 km, trees (48%) and water (41%) within 16 km, and water (58%) and trees (32%) within 80 km.

3 km
108 m
16 km
551 m
80 km
2,981 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hitoto 9.0 km · Oshima 19 km · Himimachi 21 km · Anamizu 21 km · Himi 22 km · Hakui 25 km · Nishishinminato 31 km · Ushitsu 33 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 Nanao (37.0482°, 136.968°, elevation 2 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).