Chichibu weather in August

In August, Chichibu sees average daytime highs of 27°C and overnight lows near 21°C, with 267 mm of rain across 24.7 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 26°C by the end. The sky is clear or mostly clear about 15% of the time in August, and the air most often feels muggy.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Chichibu's 9th-clearest and 11th-windiest month. For the whole year in context, see Chichibu's year-round climate.

Daytime high
27°
1st warmest
Overnight low
21°
12th coldest
Rainfall
267 mm
24.7 wet days
Daylight
13 h 24 min
5:06 AM – 6:29 PM
Cloud cover
71%
9th clearest
Wind
4 km/h
11th windiest
Solar energy
4.57 kWh/m²
Travel score
4.3
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 August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 26°C by the end.

A typical August day in Chichibu reaches about 27°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92821
102821
112821
122821
132721
142721
152721
162721
172721
182721
192721
202721
212720
222720
232720
242720
252620
262620
272620
282620
292620
302620
312620

How August really feels in Chichibu

Once humidity and wind are folded in, August 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

August 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 August compares with the rest of the year at a glance. August is the 1st-warmest and 3rd-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23466
33466
43466
53466
63466
73565
83565
93466
103367
113268
123268
133268
143268
153268
163169
173169
183169
193169
203169
213169
223169
233169
243169
253268
263268
273169
283169
293070
303070
313169

Chance of precipitation in August

Any precipitation

Chichibu gets around 267 mm of rain over 24.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 79% and peaks near 80% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
179
279
379
479
580
680
780
880
980
1080
1179
1279
1379
1479
1579
1679
1779
1879
1979
2079
2179
2279
2379
2479
2579
2679
2779
2879
2979
3079
3179

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 86% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10184348
20184249
30184150
40184150
50174151
60174052
70174052
80184051
90183952
100183952
110184051
120184051
130194049
141194149
151194148
1611104247
1712104245
1812114344
1912114343
2012124441
2112134539
2213144538
2313154636
2403164734
2503174732
2603184830
2704194928
2804204926
2904225025
3004235023
3105245021

Wind in August

Winds average 4 km/h in August.

Across August, daily wind ranges from about 4 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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 4:54 AM to 5:19 AM, and sunset from 6:45 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:546:45
213.84:556:44
313.84:566:43
413.84:576:42
513.74:586:41
613.74:586:40
713.74:596:39
813.65:006:38
913.65:016:37
1013.65:026:36
1113.55:026:35
1213.55:036:34
1313.55:046:33
1413.45:056:31
1513.45:066:30
1613.45:066:29
1713.35:076:28
1813.35:086:27
1913.35:096:25
2013.25:106:24
2113.25:116:23
2213.25:116:21
2313.15:126:20
2413.15:136:19
2513.15:146:17
2613.05:156:16
2713.05:156:15
2812.95:166:13
2912.95:176:12
3012.95:186:10
3112.85:196:09

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.57 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 — August's 4.57 kWh/m² sits near the top of that range.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.4Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
314.1Bright
Planning a trip in August

Hazard calendar for Chichibu

In seasonPeak

In August, 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 August a good time to visit Chichibu?

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

4.3
Sightseeing
5th-best month of the year
4.4
Beach & pool
1st-best month of the year

August is a reasonable time to visit Chichibu for sightseeing.

What to pack for Chichibu in August

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

In August, Chichibu sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Chichibu in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).