Yorii weather in August

In August, Yorii sees average daytime highs of 29°C and overnight lows near 23°C, with 180 mm of rain across 19.7 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 28°C by the end. The sky is clear or mostly clear about 18% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Yorii's 9th-clearest and 11th-windiest month. For the whole year in context, see Yorii's year-round climate.

Daytime high
29°
1st warmest
Overnight low
23°
12th coldest
Rainfall
180 mm
19.7 wet days
Daylight
13 h 24 min
5:06 AM – 6:29 PM
Cloud cover
69%
9th clearest
Wind
5 km/h
11th windiest
Solar energy
4.47 kWh/m²
Travel score
4.2
out of 10

Yorii is town in Ōsato district, Saitama prefecture, Japan.

Density
511/km²
people per km²
Founded
1955

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 30°C in the first days to 28°C by the end.

A typical August day in Yorii reaches about 29°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
152923
162923
172923
182923
192923
202922
212922
222922
232922
242922
252922
262822
272822
282822
292822
302822
312822

How August really feels in Yorii

Once humidity and wind are folded in, August averages 16 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
16
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Yorii weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°626.73.79.81.2
Feb / -1°597.64.110.61.6
Mar12° / 111134.511.72.9
Apr17° / 12312.80.912.95.0
May22° / 13°14814.4013.95.8
Jun24° / 18°19918.1014.45.2
Jul28° / 22°22220.8014.24.4
Aug29° / 23°18019.7013.44.2
Sep25° / 19°22317.3012.25.4
Oct20° / 13°21714.5011.15.6
Nov15° / 819.20.210.14.6
Dec10° / 547.21.39.62.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53763
63763
73763
83664
93664
103763
113763
123664
133565
143565
153565
163565
173565
183664
193565
203664
213664
223565
233664
243664
253664
263664
273664
283664
293664
303763
313664

Chance of precipitation in August

Any precipitation

Yorii gets around 180 mm of rain over 19.7 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 63% and peaks near 64% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
164
264
364
464
564
664
764
864
964
1064
1164
1264
1363
1463
1563
1663
1763
1864
1964
2064
2163
2263
2363
2463
2563
2663
2763
2863
2963
3063
3163

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 59% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100619687
200618688
300618688
400618688
500618679
600618679
700618679
800618679
900618679
1000619669
1100619668
1201620658
1301620658
1411621638
1511622637
1611623627
1711724616
1811725606
1911726605
2012827575
2112828574
2212929554
2312931543
24021032533
25021034522
26021135502
27021236482
28021237462
29021338452
30021439431
31031540411

Wind in August

Winds average 5 km/h in August.

Across August, 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 August

DaylightNight

Daylight runs from about 13 h 54 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 66 minutes over August. Sunrise moves from 4:54 AM to 5:18 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)
113.94:546:45
213.84:546:44
313.84:556:43
413.84:566:42
513.74:576:41
613.74:586:40
713.74:586:39
813.64:596:38
913.65:006:37
1013.65:016:36
1113.55:026:35
1213.55:036:34
1313.55:036:32
1413.55:046:31
1513.45:056:30
1613.45:066:29
1713.35:076:28
1813.35:076:26
1913.35:086:25
2013.25:096:24
2113.25:106:22
2213.25:116:21
2313.15:126:20
2413.15:126:18
2513.15:136:17
2613.05:146:16
2713.05:156:14
2813.05:166:13
2912.95:166:11
3012.95:176:10
3112.85:186:09

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.47 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.08 kWh/m² in May across the year — August's 4.47 kWh/m² sits near the top of that range.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
314.0Moderate
Planning a trip in August

Hazard calendar for Yorii

In seasonPeak

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

Yorii's rainy season runs March–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 Yorii?

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

4.2
Sightseeing
8th-best month of the year
5.3
Beach & pool
1st-best month of the year

August is a reasonable time to visit Yorii for sightseeing.

What to pack for Yorii in August

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

In August, Yorii sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 20 days see rain.

light clothesrain gear

UV index in Yorii 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 Yorii 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 Yorii 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 Yorii is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Yorii?

Yorii sits at 36.1°N, 139.2°E, 102 m above sea level, in Japan. The nearest listed city is Ogawamachi, 9.0 km away.

Topography around Yorii

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

Within 3 km, the terrain around Yorii has significant variations in elevation — a maximum elevation change of 298 m around an average of 139 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 955 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,855 m.

The land around Yorii is covered by trees (55%) and artificial surfaces (27%) within 3 km, trees (54%) and artificial surfaces (23%) within 16 km, and trees (60%) and artificial surfaces (23%) within 80 km.

3 km
298 m
16 km
955 m
80 km
2,855 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Ogawamachi 9.0 km · Kodamachō-kodamaminami 10 km · Fukayachō 12 km · Ranzan 13 km · Honjō 14 km · Ishigami 15 km · Yamata 16 km · Chichibu 18 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 Yorii (36.1157°, 139.1943°, elevation 102 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).