Honchō weather in September

In September, Honchō sees average daytime highs of 21°C and overnight lows near 16°C, with 170 mm of rain across 13.4 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Honchō's 6th-clearest and 8th-windiest month. For the whole year in context, see Honchō's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
16°
10th coldest
Rainfall
170 mm
13.4 wet days
Daylight
12 h 18 min
5:23 AM – 5:40 PM
Cloud cover
67%
6th clearest
Wind
10 km/h
8th windiest
Solar energy
3.77 kWh/m²
Travel score
5.8
out of 10

Honchō is town in Kameda district, Hokkaidō, Japan.

Density
132/km²
people per km²
Founded
1957

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 23°C in the first days to 19°C by the end.

A typical September day in Honchō reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, September runs about 2°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12318
22318
32318
42318
52318
62217
72217
82217
92217
102217
112217
122216
132216
142116
152116
162116
172115
182115
192115
202015
212015
222014
232014
242014
251914
261914
271913
281913
291913
301913

How September really feels in Honchō

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.

Honchō weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°527.89.19.30.0
Feb-0° / -6°497.17.210.30.0
Mar / -3°6410.17.711.70.0
Apr / 739.82.313.11.9
May14° / 9211.10.114.34.0
Jun18° / 12°869.70155.5
Jul21° / 16°12811.6014.76.0
Aug23° / 19°16712.7013.76.2
Sep21° / 16°17013.4012.35.8
Oct15° / 10411.90.110.94.4
Nov / 8211.62.69.61.3
Dec / -3°689.69.190.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13367
23268
33268
43367
53367
63367
73466
83466
93565
103565
113763
123862
133862
143961
154060
164060
174060
184159
194159
204159
214159
224258
234258
244258
254159
264159
274258
284258
294258
304258

Chance of precipitation in September

Any precipitation

Honchō gets around 170 mm of rain over 13.4 wet days in September, the wettest month. 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 47% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
246
346
447
547
647
747
847
947
1047
1147
1247
1346
1446
1546
1645
1745
1845
1944
2044
2144
2244
2343
2443
2543
2644
2744
2844
2944
3044

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
151938299
252038289
362039278
472139258
582239247
692239227
7102339216
8122439206
9132538185
10152637175
11172736164
12192835154
13212933143
14242932123
15263030113
16293128102
1731312792
1833322582
1936322372
2038332161
2141332051
2243341851
2345341641
2447341531
2549341421
2650341321
2754341110
2857321010
295832910
305931910

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:07 AM to 5:38 AM, and sunset from 6:07 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:076:07
212.95:086:05
312.95:096:03
412.85:106:01
512.85:116:00
612.85:135:58
712.75:145:56
812.75:155:54
912.65:165:53
1012.65:175:51
1112.55:185:49
1212.55:195:47
1312.45:205:45
1412.45:215:43
1512.35:225:42
1612.35:235:40
1712.25:245:38
1812.25:255:36
1912.15:265:34
2012.15:285:33
2112.05:295:31
2212.05:305:29
2311.95:315:27
2411.95:325:25
2511.85:335:24
2611.85:345:22
2711.75:355:20
2811.75:365:18
2911.75:375:16
3011.65:385:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.77 kWh/m².

For context, solar energy here swings from a low near 1.78 kWh/m² to a high of 5.43 kWh/m² in May across the year — September's 3.77 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Honchō

In seasonPeak

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

Honchō sits in the Pacific typhoon belt; the season peaks July–October.

Honchō's rainy season runs May–November, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Honchō?

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

5.8
Sightseeing
3rd-best month of the year
3.5
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Honchō for sightseeing.

What to pack for Honchō in September

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

In September, Honchō sees daytime highs around 21°C and nights near 16°C. Pack rain gear. About 13 days see rain.

rain gear

Sea temperature near Honchō in September

The nearest coast averages about 20°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 26 km away) is warmest in August at about 21°C and coldest in February near 4°C.

It's comfortable for a long swim from Aug 7 to Sep 16 — about 1.3 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan7Bracing
Feb4Bracing
Mar4Bracing
Apr6Bracing
May9Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep20Refreshing
Oct17Cool
Nov12Bracing
Dec9Bracing

UV index in Honchō in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Honchō peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May8Very high
Jun7High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Honchō 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 Honchō is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1216 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May14Moderate
Jun9Good
Jul8Good
Aug8Good
Sep8Good
Oct9Good
Nov8Good
Dec6Good
Location & terrain

Where is Honchō?

Honchō sits at 41.9°N, 140.7°E, 72 m above sea level, in Japan. The nearest listed city is Kamiiso, 9.0 km away.

Topography around Honchō

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

Within 3 km, the terrain around Honchō has significant variations in elevation — a maximum elevation change of 527 m around an average of 110 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,164 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,258 m.

The land around Honchō is covered by trees (39%) and cropland (35%) within 3 km, trees (68%) within 16 km, and water (62%) and trees (35%) within 80 km.

3 km
527 m
16 km
1,164 m
80 km
1,258 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kamiiso 9.0 km · Hokuto 10 km · Hakodate 14 km · Muroran 53 km · Yakumo 53 km · Date 65 km · Noboribetsu 74 km · Mutsu 80 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 Honchō (41.8944°, 140.6939°, elevation 72 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).