Tachiarai weather in October

In October, Tachiarai sees average daytime highs of 23°C and overnight lows near 15°C, with 101 mm of rain across 8 wet days and about 11.2 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 21°C by the end. The sky is clear or mostly clear about 44% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 42 min by month's end. Set against the rest of the year, October is Tachiarai's 1st-clearest and 6th-windiest month. For the whole year in context, see Tachiarai's year-round climate.

Daytime high
23°
6th warmest
Overnight low
15°
7th coldest
Rainfall
101 mm
8 wet days
Daylight
11 h 12 min
6:28 AM – 5:37 PM
Cloud cover
50%
1st clearest
Wind
8 km/h
6th windiest
Solar energy
3.66 kWh/m²
Travel score
7.2
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 21°C by the end.

A typical October day in Tachiarai reaches about 23°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, October runs about 5°C cooler than September and about 6°C warmer than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12618
22617
32517
42517
52517
62517
72517
82516
92516
102416
112416
122415
132415
142415
152415
162315
172314
182314
192314
202314
212214
222213
232213
242213
252213
262113
272112
282112
292112
302112
312112

How October really feels in Tachiarai

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tachiarai weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 639.61.5102.1
Feb11° / 719.11.210.82.6
Mar14° / 11511.60.211.74.1
Apr19° / 10°13011.1012.85.9
May24° / 15°14710.6013.76.6
Jun27° / 20°30515.8014.25.3
Jul30° / 24°28717.50143.9
Aug32° / 24°17115.1013.23.7
Sep28° / 21°17912.8012.25.5
Oct23° / 15°1018011.27.2
Nov18° / 868.6010.35.8
Dec12° / 699.30.69.83.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25347
35347
45446
55545
65644
75842
85842
95941
105941
116139
126139
136139
146238
156238
166238
176238
186238
196238
206238
216139
226139
236040
246040
256139
266040
276040
286040
296040
306139
316040

Chance of precipitation in October

Any precipitation

Tachiarai gets around 101 mm of rain over 8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
133
232
332
431
530
630
729
828
927
1027
1126
1226
1326
1425
1525
1625
1725
1825
1925
2026
2126
2226
2325
2425
2525
2625
2725
2825
2925
3025
3125

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1152630219
2162629208
3182729197
4202828177
5222928166
6242927155
7262926145
8293024134
9323023123
10342922113
11372921102
12392920102
1342291992
1444291881
1546291771
1648291671
1750281561
1851281461
1954271450
2055271350
2158261240
2260251140
2361251130
2463241030
2564231030
266722920
276821920
287020820
297119820
307219720
317318720

Wind in October

Winds average 8 km/h in October.

Across October, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
89calm
99calm
109calm
119calm
129calm
139calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over October. Sunrise moves from 6:16 AM to 6:41 AM, and sunset from 5:57 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:165:57
211.66:175:55
311.66:185:54
411.66:195:53
511.56:195:51
611.56:205:50
711.56:215:49
811.46:225:47
911.46:225:46
1011.46:235:45
1111.36:245:43
1211.36:255:42
1311.36:255:41
1411.26:265:40
1511.26:275:38
1611.26:285:37
1711.16:295:36
1811.16:305:35
1911.16:305:34
2011.06:315:33
2111.06:325:31
2211.06:335:30
2310.96:345:29
2410.96:355:28
2510.96:365:27
2610.86:365:26
2710.86:375:25
2810.86:385:24
2910.76:395:23
3010.76:405:22
3110.76:415:21

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.66 kWh/m².

For context, solar energy here swings from a low near 2.18 kWh/m² to a high of 5.36 kWh/m² in May across the year — October's 3.66 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
313.2Moderate
Planning a trip in October

Hazard calendar for Tachiarai

In seasonPeak

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

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

Tachiarai's rainy season runs May–September, 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 October a good time to visit Tachiarai?

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

7.2
Sightseeing
1st-best month of the year
5.6
Beach & pool
3rd-best month of the year

October is one of the better times to visit Tachiarai for general sightseeing.

What to pack for Tachiarai in October

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

In October, Tachiarai sees daytime highs around 23°C and nights near 15°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Tachiarai in October

The nearest coast averages about 23°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 38 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Tachiarai in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Tachiarai peaks around July 13 at about 10 (very high) — 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 13UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Tachiarai in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Tachiarai is worst in April — around 25 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1225 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun18Moderate
Jul13Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Tachiarai?

Tachiarai sits at 33.4°N, 130.6°E, 26 m above sea level, in Japan. The nearest listed city is Yamaguma, 2.0 km away.

Topography around Tachiarai

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

Within 3 km, the terrain around Tachiarai has only modest variations in elevation — a maximum elevation change of 125 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 923 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Tachiarai is covered by cropland (53%) and artificial surfaces (32%) within 3 km, trees (51%), cropland (22%) and artificial surfaces (22%) within 16 km, and trees (47%) and water (32%) within 80 km.

3 km
125 m
16 km
923 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Yamaguma 2.0 km · Amagi 4.0 km · Ogōri 6.0 km · Tanushimarumachi-toyoki 8.0 km · Asakura 10 km · Tosu 10 km · Sonobe 11 km · Kurume 13 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 Tachiarai (33.4°, 130.6167°, elevation 26 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).