Yachi weather in October

In October, Yachi sees average daytime highs of 17°C and overnight lows near 9°C, with 125 mm of rain across 13.6 wet days and about 11 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 15°C by the end. The sky is clear or mostly clear about 19% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 24 min by month's end. Set against the rest of the year, October is Yachi's 2nd-clearest and 8th-windiest month. For the whole year in context, see Yachi's year-round climate.

Daytime high
17°
6th warmest
Overnight low
7th coldest
Rainfall
125 mm
13.6 wet days
Daylight
11 hours
5:54 AM – 4:53 PM
Cloud cover
67%
2nd clearest
Wind
7 km/h
8th windiest
Solar energy
2.88 kWh/m²
Travel score
5.0
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 15°C by the end.

A typical October day in Yachi reaches about 17°C in the afternoon and slips back to 9°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°C. Set against its neighbours, October runs about 6°C cooler than September and about 7°C warmer than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12012
22012
32012
42012
51911
61911
71911
81911
91911
101810
111810
121810
131810
14189
15189
16179
17179
18179
19178
20178
21168
22168
23168
24167
25167
26157
27157
28157
29156
30156
31146

How October really feels in Yachi

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.

Yachi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°13522.623.99.60.0
Feb / -4°9618.618.710.50.0
Mar / -1°11417.712.611.70.5
Apr13° / 9813.72.6133.3
May19° / 10°9912.3014.15.6
Jun22° / 15°12012.5014.66.0
Jul26° / 19°19317.1014.45.4
Aug27° / 20°15115.1013.55.6
Sep23° / 16°12813.3012.35.9
Oct17° / 12513.60115.0
Nov11° / 10916.949.92.2
Dec / -2°13621.4179.40.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 21% of October, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33466
43565
53565
63565
73763
83763
93763
103961
114060
124060
134060
144159
154159
164159
174258
184258
194258
204159
214159
224159
234159
244159
254159
264159
274159
284159
294159
304159
314159

Chance of precipitation in October

Any precipitation

Yachi gets around 125 mm of rain over 13.6 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 44% and peaks near 47% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
145
245
345
445
545
644
744
844
943
1043
1142
1242
1341
1441
1541
1641
1741
1841
1942
2042
2142
2243
2344
2444
2545
2646
2746
2847
2947
3047
3147

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15134132
25333122
35532112
45731102
5603091
6612991
7642781
8672571
9692461
10712261
11752050
12771850
13801640
14821440
15851230
16861130
17871030
1890820
1991720
2092620
2194510
2294510
2395410
2495410
2596310
2696310
2797300
2898200
2998200
3098200
3198200

Wind in October

Winds average 7 km/h in October.

Across October, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 5:40 AM to 6:10 AM, and sunset from 5:16 PM to 4:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:405:16
211.65:415:14
311.55:415:13
411.55:425:11
511.45:435:10
611.45:445:08
711.45:455:07
811.35:465:05
911.35:475:03
1011.25:485:02
1111.25:495:01
1211.15:504:59
1311.15:514:58
1411.15:524:56
1511.05:534:55
1611.05:544:53
1710.95:554:52
1810.95:564:51
1910.95:574:49
2010.85:584:48
2110.86:004:46
2210.76:014:45
2310.76:024:44
2410.76:034:43
2510.66:044:41
2610.66:054:40
2710.66:064:39
2810.56:074:38
2910.56:084:37
3010.46:094:36
3110.46:104:34

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.88 kWh/m².

For context, solar energy here swings from a low near 1.76 kWh/m² to a high of 5.26 kWh/m² in May across the year — October's 2.88 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.1Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.0Moderate
93.0Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.5Moderate
312.5Moderate
Planning a trip in October

Hazard calendar for Yachi

In seasonPeak

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

Yachi 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 October a good time to visit Yachi?

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

5.0
Sightseeing
6th-best month of the year
1.4
Beach & pool
6th-best month of the year

October is a reasonable time to visit Yachi for sightseeing.

What to pack for Yachi in October

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

In October, Yachi sees daytime highs around 17°C and nights near 9°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Yachi in October

The nearest coast averages about 21°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 64 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 24 to Oct 27 — about 4.1 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct21Refreshing
Nov18Cool
Dec15Bracing

UV index in Yachi in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yachi peaks around August 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 15UV 9Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Yachi 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 Yachi is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1622 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Yachi?

Yachi sits at 38.4°N, 140.3°E, 89 m above sea level, in Japan. The nearest listed city is Sagae, 6.0 km away.

Topography around Yachi

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

Within 3 km, the terrain around Yachi has only modest variations in elevation — a maximum elevation change of 243 m around an average of 102 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,393 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,209 m.

The land around Yachi is covered by cropland (51%), trees (21%) and artificial surfaces (21%) within 3 km, trees (63%) and cropland (22%) within 16 km, and trees (73%) within 80 km.

3 km
243 m
16 km
1,393 m
80 km
2,209 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Sagae 6.0 km · Higashine 8.0 km · Tendō 9.0 km · Murayama 11 km · Yamagata 22 km · Obanazawa 22 km · Kaminoyama 30 km · Shinjō 37 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 Yachi (38.4219°, 140.3083°, elevation 89 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).