Ishikawa weather in September

In September, Ishikawa sees average daytime highs of 28°C and overnight lows near 27°C, with 188 mm of rain across 13.4 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Ishikawa's 2nd-clearest and 7th-windiest month. For the whole year in context, see Ishikawa's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
27°
10th coldest
Rainfall
188 mm
13.4 wet days
Daylight
12 h 12 min
6:18 AM – 6:28 PM
Cloud cover
54%
2nd clearest
Wind
24 km/h
7th windiest
Solar energy
5.19 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Ishikawa reaches about 28°C in the afternoon and slips back to 27°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12827
22827
32827
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182826
192826
202826
212826
222726
232726
242726
252726
262726
272726
282726
292726
302726

How September really feels in Ishikawa

Once humidity and wind are folded in, September averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ishikawa 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 daysDaylight (hours)Travel score
Jan19° / 17°1031210.55.6
Feb19° / 17°9911.711.15.5
Mar20° / 18°13413.211.85.8
Apr22° / 20°15813.212.66.0
May24° / 23°20714.113.36.1
Jun27° / 26°22415.513.65.4
Jul28° / 27°12410.913.55.6
Aug29° / 27°17514.412.95.2
Sep28° / 27°18813.412.25.8
Oct26° / 25°13911.811.46.5
Nov23° / 22°10010.710.76.7
Dec21° / 19°11011.310.46.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55545
65644
75644
85644
95743
105743
115743
125842
135941
145842
155842
165941
175941
185941
195743
205743
215842
225842
235842
245842
255842
265842
275941
285941
295941
305941

Chance of precipitation in September

Any precipitation

Ishikawa gets around 188 mm of rain over 13.4 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 44% and peaks near 48% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
148
248
348
448
548
647
747
846
946
1045
1144
1244
1343
1443
1543
1642
1742
1842
1942
2042
2142
2242
2342
2442
2541
2641
2741
2841
2941
3040

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10122176
20132175
30132274
40132373
50132373
60132472
70142471
80142570
90152569
100252568
110262666
120272665
130372763
140382762
150392860
1604102957
1704103056
1805113153
1905123251
2006133349
2106133446
2207143544
2307143642
2408153740
2508153938
2618154036
2718164035
2819164133
2919174231
3019184230

Wind in September

Winds average 24 km/h in September.

Across September, daily wind ranges from about 22 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
122breezy
222breezy
323breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2926breezy
3026breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over September. Sunrise moves from 6:12 AM to 6:25 AM, and sunset from 6:45 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:126:45
212.56:126:44
312.56:136:43
412.56:136:42
512.46:146:40
612.46:146:39
712.46:156:38
812.46:156:37
912.36:156:36
1012.36:166:35
1112.36:166:33
1212.36:176:32
1312.26:176:31
1412.26:186:30
1512.26:186:29
1612.26:186:28
1712.16:196:26
1812.16:196:25
1912.16:206:24
2012.06:206:23
2112.06:216:22
2212.06:216:21
2312.06:216:19
2411.96:226:18
2511.96:226:17
2611.96:236:16
2711.96:236:15
2811.86:246:14
2911.86:246:13
3011.86:256:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.19 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 6.42 kWh/m² in July across the year — September's 5.19 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Ishikawa

In seasonPeak

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

Ishikawa 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 Ishikawa?

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

5.8
Sightseeing
6th-best month of the year
6.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Ishikawa for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ishikawa in September

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

In September, Ishikawa sees daytime highs around 28°C and nights near 27°C. Pack light clothes. Worth having: rain gear, sun protection and a windbreaker. About 13 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Ishikawa in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 29°C and coldest in February near 22°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar22Refreshing
Apr23Refreshing
May25Warm
Jun27Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov25Warm
Dec24Refreshing

UV index in Ishikawa in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ishikawa peaks around July 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 11UV 12Dec 22UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar9Very high
Apr8Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5Moderate

Air quality in Ishikawa 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 Ishikawa is worst in March — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2017 µg/m³Jul 128 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar17Moderate
Apr16Moderate
May13Moderate
Jun9Good
Jul8Good
Aug10Good
Sep9Good
Oct9Good
Nov10Good
Dec10Good
Location & terrain

Where is Ishikawa?

Ishikawa sits at 26.4°N, 127.8°E, 11 m above sea level, in Japan. The nearest listed city is Uruma, 6.0 km away.

Topography around Ishikawa

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

Within 3 km, the terrain around Ishikawa has only modest variations in elevation — a maximum elevation change of 192 m around an average of 45 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 358 m; within 80 km, significant variations in elevation — a maximum elevation change of 491 m.

The land around Ishikawa is covered by trees (54%) within 3 km, water (63%) and trees (22%) within 16 km, and water (92%) within 80 km.

3 km
192 m
16 km
358 m
80 km
491 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Uruma 6.0 km · Yomitan 8.0 km · Gushikawa 8.0 km · Okinawa 10 km · Katsuren-haebaru 11 km · Kishaba 14 km · Chatan 14 km · Ginowan 19 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 Ishikawa (26.4233°, 127.8214°, elevation 11 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).