Semboku weather in October

In October, Semboku sees average daytime highs of 15°C and overnight lows near 7°C, with 159 mm of precipitation across 15 wet days and about 10.9 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 12°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 18 min by month's end. Set against the rest of the year, October is Semboku's 2nd-clearest and 8th-windiest month. For the whole year in context, see Semboku's year-round climate.

Daytime high
15°
6th warmest
Overnight low
7th coldest
Precipitation
159 mm
15 wet days
Daylight
10 h 54 min
5:54 AM – 4:50 PM
Cloud cover
67%
2nd clearest
Wind
8 km/h
8th windiest
Solar energy
2.88 kWh/m²
Travel score
4.1
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 18°C in the first days to 12°C by the end.

A typical October day in Semboku reaches about 15°C in the afternoon and slips back to 7°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 19°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)
11810
21810
31810
41810
51710
6179
7179
8179
9179
10168
11168
12168
13168
14168
15157
16157
17157
18157
19156
20146
21146
22146
23146
24145
25135
26135
27135
28135
29125
30124
31124

How October really feels in Semboku

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.

Semboku weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -8°10718.322.19.50.0
Feb / -7°9816.118.310.40.0
Mar / -4°13418.316.211.70.1
Apr10° / 13315.95132.1
May17° / 150150.114.24.6
Jun21° / 13°15815.1014.85.3
Jul24° / 18°25019.6014.55.2
Aug25° / 19°21617.9013.65.4
Sep21° / 14°18715.8012.35.4
Oct15° / 159150.310.94.1
Nov / 13717.66.49.81.2
Dec / -5°13019.419.29.20.0

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 19% of October, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33367
43367
53367
63367
73565
83565
93565
103664
113763
123862
133961
143961
154060
164060
173961
184060
194060
204060
214159
224159
234159
244060
254060
263961
274060
284060
293961
303961
313961

Chance of precipitation in October

Any precipitationSnow

Semboku gets around 159 mm of rain and snow over 15 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 48% and peaks near 52% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1490
2490
3490
4490
5490
6490
7490
8480
9480
10480
11470
12470
13460
14461
15451
16451
17451
18451
19461
20461
21461
22472
23482
24482
25492
26502
27502
28513
29513
30523
31524

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1692461
2712360
3732250
4742150
5762040
6771940
7791740
8811630
9821530
10841420
11861220
12871120
13891010
1490910
1591810
1692710
1793610
1894510
1995500
2096400
2197300
2297300
2398200
2498200
2599100
2699100
2799100
2899100
2999100
3099100
3199100

Wind in October

Winds average 8 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
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 36 min at the start of October to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over October. Sunrise moves from 5:38 AM to 6:11 AM, and sunset from 5:14 PM to 4:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:385:14
211.55:395:12
311.55:405:10
411.55:415:09
511.45:425:07
611.45:435:05
711.35:445:04
811.35:465:02
911.25:475:01
1011.25:484:59
1111.15:494:58
1211.15:504:56
1311.15:514:55
1411.05:524:53
1511.05:534:52
1610.95:544:50
1710.95:554:49
1810.95:564:47
1910.85:574:46
2010.85:584:44
2110.75:594:43
2210.76:014:42
2310.66:024:40
2410.66:034:39
2510.66:044:38
2610.56:054:36
2710.56:064:35
2810.46:074:34
2910.46:084:33
3010.46:104:32
3110.36:114:30

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 1.73 kWh/m² to a high of 5.22 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
33.2Moderate
43.2Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.0Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in October

Is October a good time to visit Semboku?

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

4.1
Sightseeing
6th-best month of the year
0.6
Beach & pool
6th-best month of the year

October is a reasonable time to visit Semboku for sightseeing.

What to pack for Semboku in October

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

In October, Semboku sees daytime highs around 15°C and nights near 7°C. Pack rain gear. Worth having: a warm layer. About 15 days see rain.

rain geara warm layer

UV index in Semboku 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 Semboku peaks around August 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighVery highHighModerateLowAug 18UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Semboku 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 Semboku is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1420 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep11Good
Oct12Good
Nov11Good
Dec9Good
Location & terrain

Where is Semboku?

Semboku sits at 39.7°N, 140.7°E, 389 m above sea level, in Japan. The nearest listed city is Shizukuishi, 20 km away.

Topography around Semboku

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

Within 3 km, the terrain around Semboku has large variations in elevation — a maximum elevation change of 836 m around an average of 444 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,556 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,976 m.

The land around Semboku is covered by trees (88%) within 3 km, trees (91%) within 16 km, and trees (80%) within 80 km.

3 km
836 m
16 km
1,556 m
80 km
1,976 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Shizukuishi 20 km · Morioka 35 km · Takizawa 35 km · Yahaba 36 km · Ōmagari 37 km · Rokugō 37 km · Daisen 37 km · Hachimantai 39 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 Semboku (39.7093°, 140.7465°, elevation 389 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. 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).