Hōjō weather in September

In September, Hōjō sees average daytime highs of 26°C and overnight lows near 23°C, with 159 mm of rain across 11.6 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 24°C by the end. The sky is clear or mostly clear about 36% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Hōjō's 7th-clearest and 8th-windiest month. For the whole year in context, see Hōjō's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
159 mm
11.6 wet days
Daylight
12 h 12 min
5:57 AM – 6:09 PM
Cloud cover
58%
7th clearest
Wind
12 km/h
8th windiest
Solar energy
4.4 kWh/m²
Travel score
6.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 24°C by the end.

A typical September day in Hōjō reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12824
22824
32824
42724
52724
62724
72724
82724
92724
102723
112723
122723
132623
142623
152623
162623
172622
182622
192622
202522
212522
222522
232521
242521
252521
262521
272421
282421
292421
302420

How September really feels in Hōjō

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.

Hōjō 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 / 6410.61.1101.8
Feb10° / 7410.11.210.72.0
Mar12° / 11010.90.211.73.4
Apr17° / 12°12310.4012.85.2
May20° / 16°1419.9013.76.3
Jun23° / 20°22713.8014.25.9
Jul27° / 24°195130145.8
Aug29° / 25°11211.2013.35.6
Sep26° / 23°15911.6012.26.4
Oct21° / 18°1258.6011.17.0
Nov16° / 13°758.6010.25.5
Dec12° / 7711.20.59.83.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55050
65050
74951
84951
95050
105050
115149
125149
135149
145050
155149
165149
175149
185050
195050
205050
215050
225050
235050
245050
255050
265149
275149
285149
295248
305248

Chance of precipitation in September

Any precipitation

Hōjō gets around 159 mm of rain over 11.6 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
340
440
540
640
740
840
940
1040
1140
1239
1339
1438
1538
1637
1737
1837
1937
2037
2137
2236
2336
2436
2536
2636
2735
2835
2935
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004225420
2014235319
3015245317
4016255216
5016265215
6017275213
7028285012
8029284911
91310294810
10131130469
11141230458
12151430437
13151530417
14261731396
15271831375
16282031355
17392131324
183102231303
194112431283
204122531263
214132630242
225142830222
235152929202
246163029182
256163128171
266173228151
277183327141
288193326131
298203426120
309213425110

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1512calm
1612calm
1712calm
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 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 60 minutes over September. Sunrise moves from 5:46 AM to 6:07 AM, and sunset from 6:31 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:466:31
212.75:476:29
312.75:486:28
412.65:486:27
512.65:496:25
612.65:506:24
712.55:516:22
812.55:516:21
912.55:526:20
1012.45:536:18
1112.45:536:17
1212.45:546:15
1312.35:556:14
1412.35:566:12
1512.25:566:11
1612.25:576:09
1712.25:586:08
1812.15:586:07
1912.15:596:05
2012.16:006:04
2112.06:016:02
2212.06:016:01
2312.06:025:59
2411.96:035:58
2511.96:035:56
2611.86:045:55
2711.86:055:54
2811.86:065:52
2911.76:065:51
3011.76:075:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.4 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.66 kWh/m² in May across the year — September's 4.4 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
Planning a trip in September

Hazard calendar for Hōjō

In seasonPeak

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

Hōjō 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 Hōjō?

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

6.4
Sightseeing
2nd-best month of the year
6.2
Beach & pool
2nd-best month of the year

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

What to pack for Hōjō in September

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

In September, Hōjō sees daytime highs around 26°C and nights near 23°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Hōjō 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 18 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 12 to Nov 17 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Hōjō in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hōjō peaks around July 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 11UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Hōjō 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 Hōjō is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1523 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Hōjō?

Hōjō sits at 34.0°N, 132.8°E, 7 m above sea level, in Japan. The nearest listed city is Matsuyama, 15 km away.

Topography around Hōjō

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

Within 3 km, the terrain around Hōjō has significant variations in elevation — a maximum elevation change of 277 m around an average of 27 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,205 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Hōjō is covered by water (39%) and trees (26%) within 3 km, water (50%) and trees (41%) within 16 km, and trees (57%) and water (36%) within 80 km.

3 km
277 m
16 km
1,205 m
80 km
1,895 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Matsuyama 15 km · Masaki-chō 22 km · Tōon 23 km · Haramachi 23 km · Imabari 23 km · Iyo 26 km · Kure 34 km · Saijō 38 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 Hōjō (33.9766°, 132.7777°, elevation 7 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).