Okayama weather in July

In July, Okayama sees average daytime highs of 31°C and overnight lows near 24°C, with 187 mm of rain across 13.6 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 33°C by the end. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 18 min at the start of July to 13 h 48 min by month's end. Set against the rest of the year, July is Okayama's 11th-clearest and 11th-windiest month. For the whole year in context, see Okayama's year-round climate.

Daytime high
31°
2nd warmest
Overnight low
24°
11th coldest
Rainfall
187 mm
13.6 wet days
Daylight
14 h 06 min
5:07 AM – 7:13 PM
Cloud cover
71%
11th clearest
Wind
8 km/h
11th windiest
Solar energy
5.35 kWh/m²
Travel score
4.0
out of 10
Air quality
Moderate
PM2.5 11 µg/m³ · 2010

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 29°C in the first days to 33°C by the end.

A typical July day in Okayama reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, July runs about 4°C warmer than June and about 2°C cooler than August.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
12922
22922
32923
42923
52923
62923
73023
83023
93023
103023
113024
123024
133124
143124
153124
163124
173124
183124
193124
203224
213225
223225
233225
243225
253225
263225
273225
283325
293325
303325
313325

How July really feels in Okayama

Once humidity and wind are folded in, July averages 26 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
26
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Okayama weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 405.50.39.92.4
Feb11° / 486.40.610.72.8
Mar14° / 929.30.111.74.3
Apr20° / 10°1089.7012.86.2
May24° / 15°1259.9013.86.8
Jun27° / 20°17212.2014.35.8
Jul31° / 24°18713.6014.14.0
Aug33° / 25°10810.3013.33.6
Sep29° / 21°16810.8012.25.5
Oct23° / 14°1147.7011.17.2
Nov18° / 576.1010.26.2
Dec12° / 465.30.19.73.7

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
32179
42278
52278
62278
72278
82377
92476
102575
112575
122773
132773
142872
153070
163070
173268
183367
193466
203664
213763
223862
234060
244159
254258
264357
274555
284654
294654
304753
314753

Chance of precipitation in July

Any precipitation

Okayama gets around 187 mm of rain over 13.6 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
152
251
351
450
550
649
749
848
948
1047
1146
1246
1345
1444
1543
1643
1742
1842
1941
2041
2140
2240
2339
2438
2538
2637
2736
2835
2935
3034
3134

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
131041443
22939473
32838494
41737505
51635535
61634536
70533557
80532558
90530569
1005295610
1104285711
1204275811
1304265812
1404245913
1504235914
1604225915
1704215817
1804205818
1904195819
2003185920
2103185821
2203175822
2303165724
2403155725
2502155726
2602145727
2702145628
2802135728
2902135629
3002135629
3101135630

Wind in July

Winds average 8 km/h in July.

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

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 18 min at the start of July to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 4:59 AM to 5:17 AM, and sunset from 7:16 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:597:16
214.34:597:16
314.35:007:16
414.35:007:16
514.35:007:16
614.35:017:16
714.25:017:16
814.25:027:16
914.25:027:16
1014.25:037:15
1114.25:047:15
1214.25:047:15
1314.25:057:14
1414.15:057:14
1514.15:067:14
1614.15:077:13
1714.15:077:13
1814.15:087:12
1914.15:087:12
2014.05:097:11
2114.05:107:11
2214.05:107:10
2314.05:117:10
2414.05:127:09
2513.95:137:08
2613.95:137:08
2713.95:147:07
2813.95:157:06
2913.85:157:05
3013.85:167:05
3113.85:177:04

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.35 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.74 kWh/m² in May across the year — July's 5.35 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.5Bright
195.5Bright
205.5Bright
215.6Bright
225.6Bright
235.6Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Hazard calendar for Okayama

In seasonPeak

In July, Okayama sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Okayama sits in the Pacific typhoon belt; the season peaks July–October.

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

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

Is July a good time to visit Okayama?

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

4.0
Sightseeing
8th-best month of the year
6.0
Beach & pool
3rd-best month of the year

July is a reasonable time to visit Okayama for sightseeing.

What to pack for Okayama in July

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

In July, Okayama sees daytime highs around 31°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Okayama in July

The nearest coast averages about 25°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 41 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 12 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov20Cool
Dec16Cool

UV index in Okayama in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Okayama peaks around July 13 at about 10 (extreme) — 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateJul 13UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Okayama in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Okayama is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Okayama's WHO annual average of 11 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1415 µg/m³Oct 168 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr15Moderate
May14Moderate
Jun12Moderate
Jul10Good
Aug10Good
Sep9Good
Oct8Good
Nov9Good
Dec9Good
Location & terrain

Where is Okayama?

Okayama sits at 34.6°N, 133.9°E, 5 m above sea level, in Japan. The nearest listed city is Tamano, 15 km away.

Topography around Okayama

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

Within 3 km, the terrain around Okayama has only modest variations in elevation — a maximum elevation change of 171 m around an average of 13 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 503 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,811 m.

The land around Okayama is covered by artificial surfaces (79%) within 3 km, trees (41%) and artificial surfaces (26%) within 16 km, and trees (61%) and water (26%) within 80 km.

3 km
171 m
16 km
503 m
80 km
1,811 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Tamano 15 km · Sōja 17 km · Kurashiki 17 km · Setouchi 19 km · Akaiwa 20 km · Naoshima 22 km · Bizen 32 km · Takahashi 33 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 Okayama (34.65°, 133.9333°, elevation 5 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).