Chichibu weather in October

In October, Chichibu sees average daytime highs of 18°C and overnight lows near 11°C, with 248 mm of rain across 17.6 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 16°C by the end. The sky is clear or mostly clear about 28% 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 30 min by month's end. Set against the rest of the year, October is Chichibu's 7th-clearest and 8th-windiest month. For the whole year in context, see Chichibu's year-round climate.

Daytime high
18°
6th warmest
Overnight low
11°
7th coldest
Rainfall
248 mm
17.6 wet days
Daylight
11 h 06 min
5:57 AM – 5:01 PM
Cloud cover
65%
7th clearest
Wind
5 km/h
8th windiest
Solar energy
3 kWh/m²
Travel score
4.8
out of 10

Chichibu is city in Saitama prefecture, Japan.

Density
106/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 16°C by the end.

A typical October day in Chichibu reaches about 18°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 22°C. Set against its neighbours, October runs about 5°C cooler than September and about 5°C warmer than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12114
22014
32014
42014
52013
62013
72013
82013
91913
101912
111912
121912
131912
141912
151811
161811
171811
181811
191811
201810
211710
221710
231710
24179
25179
26179
27179
28169
29168
30168
31168

How October really feels in Chichibu

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.

Chichibu weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°718.35.49.80.6
Feb / -2°739.75.710.60.9
Mar11° / 13815.25.911.72.2
Apr16° / 15715.21.212.94.3
May20° / 11°19517.2013.95.2
Jun23° / 16°26622.2014.44.5
Jul26° / 20°31825.1014.24.2
Aug27° / 21°26724.7013.44.3
Sep23° / 17°28121.2012.24.8
Oct18° / 11°24817.6011.14.8
Nov14° / 9310.70.310.13.9
Dec / 648.32.39.61.9

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23367
33367
43466
53466
63466
73565
83565
93664
103664
113664
123664
133763
143862
153763
163862
173961
183961
194159
204258
214258
224555
234555
244753
254852
264951
275050
285248
295347
305446
315545

Chance of precipitation in October

Any precipitation

Chichibu gets around 248 mm of rain over 17.6 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 56% and peaks near 63% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
163
263
362
462
562
661
761
861
961
1060
1160
1259
1358
1458
1557
1656
1756
1855
1955
2054
2154
2253
2352
2452
2551
2650
2748
2847
2946
3044
3143

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13638224
23838204
34038193
44237182
54437172
64736162
74934151
85233141
95531131
105829121
116127111
12652591
13682381
14702181
15741970
16761860
17791650
18811540
19831340
20851230
21871120
22881020
2390910
2491810
2592710
2694600
2794600
2895500
2995500
3096400
3196400

Wind in October

Winds average 5 km/h in October.

Across October, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over October. Sunrise moves from 5:43 AM to 6:11 AM, and sunset from 5:22 PM to 4:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:435:22
211.65:445:20
311.65:455:19
411.55:465:17
511.55:475:16
611.45:485:15
711.45:495:13
811.45:495:12
911.35:505:10
1011.35:515:09
1111.35:525:07
1211.25:535:06
1311.25:545:05
1411.15:555:03
1511.15:565:02
1611.15:575:01
1711.05:585:00
1811.05:594:58
1911.05:594:57
2010.96:004:56
2110.96:014:55
2210.96:024:53
2310.86:034:52
2410.86:044:51
2510.76:054:50
2610.76:064:49
2710.76:074:48
2810.66:084:47
2910.66:094:45
3010.66:104:44
3110.56:114:43

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.21 kWh/m² in May across the year — October's 3 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.1Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
123.0Moderate
133.0Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.0Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in October

Hazard calendar for Chichibu

In seasonPeak

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

Chichibu's rainy season runs April–October, when most of the year's rain falls.

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

Is October a good time to visit Chichibu?

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

4.8
Sightseeing
2nd-best month of the year
1.7
Beach & pool
6th-best month of the year

October is a reasonable time to visit Chichibu for sightseeing.

What to pack for Chichibu in October

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

In October, Chichibu sees daytime highs around 18°C and nights near 11°C. Pack rain gear. About 18 days see rain.

rain gear

UV index in Chichibu in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Chichibu peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Chichibu 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 Chichibu is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug14Moderate
Sep13Moderate
Oct12Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Chichibu?

Chichibu sits at 36.0°N, 139.1°E, 236 m above sea level, in Japan. The nearest listed city is Yorii, 18 km away.

Topography around Chichibu

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

Within 3 km, the terrain around Chichibu has significant variations in elevation — a maximum elevation change of 424 m around an average of 280 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,713 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Chichibu is covered by trees (56%) and artificial surfaces (33%) within 3 km, trees (92%) within 16 km, and trees (61%) and artificial surfaces (24%) within 80 km.

3 km
424 m
16 km
1,713 m
80 km
3,737 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Yorii 18 km · Ogawamachi 18 km · Morohongō 21 km · Kodamachō-kodamaminami 22 km · Ranzan 23 km · Hannō 27 km · Hidaka 27 km · Ōme 27 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 Chichibu (35.9903°, 139.0764°, elevation 236 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).