Ōjima weather in July

In July, Ōjima sees average daytime highs of 29°C and overnight lows near 23°C, with 149 mm of rain across 12.9 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 31°C by the end. The sky is clear or mostly clear about 17% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 24 min at the start of July to 13 h 54 min by month's end. Set against the rest of the year, July is Ōjima's 11th-clearest and 6th-windiest month. For the whole year in context, see Ōjima's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
23°
11th coldest
Rainfall
149 mm
12.9 wet days
Daylight
14 h 12 min
4:40 AM – 6:52 PM
Cloud cover
74%
11th clearest
Wind
12 km/h
6th windiest
Solar energy
4.6 kWh/m²
Travel score
4.9
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 31°C by the end.

A typical July day in Ōjima reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°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, July runs about 4°C warmer than June and about 2°C cooler than August.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12722
22722
32822
42822
52822
62822
72822
82822
92823
102923
112923
122923
132923
142923
152923
162923
172923
182923
193024
203024
213024
223024
233024
243024
253024
263024
273024
283124
293124
303125
313125

How July really feels in Ōjima

Once humidity and wind are folded in, July 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 July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ōjima weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 676.91.29.92.1
Feb10° / 627.51.510.62.4
Mar13° / 11311.60.811.73.7
Apr18° / 10°11311.4012.95.5
May23° / 15°12911.8013.96.4
Jun25° / 19°15913.6014.45.8
Jul29° / 23°14912.9014.24.9
Aug31° / 25°11010.8013.34.5
Sep27° / 21°18013.6012.25.6
Oct21° / 15°20912.9011.16.1
Nov16° / 919.8010.15.3
Dec12° / 597.50.29.63.3

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 11% of July, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12179
22179
32278
42377
52278
62377
72476
82476
92476
102575
112575
122575
132575
142674
152674
162674
172773
182773
192872
202971
212971
223070
233169
243169
253367
263367
273664
283664
293862
303862
314060

Chance of precipitation in July

Any precipitation

Ōjima gets around 149 mm of rain over 12.9 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
150
250
350
449
549
649
748
847
947
1046
1145
1244
1343
1442
1542
1641
1740
1839
1938
2038
2137
2236
2336
2435
2534
2633
2733
2832
2931
3031
3130

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
141441402
231340422
331338442
421237463
521235483
621134494
711033524
811032525
911031526
101930546
111929547
121928557
131927558
141926559
1508255710
1608245711
1708235712
1808225614
1907215715
2007205617
2107195618
2206185620
2306175522
2406165523
2506155425
2605145427
2705135428
2805125330
2905115331
3005115232
3105105233

Wind in July

Winds average 12 km/h in July.

Across July, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 24 min at the start of July to 13 h 54 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 4:32 AM to 4:51 AM, and sunset from 6:56 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:326:56
214.44:336:56
314.44:336:56
414.44:346:56
514.44:346:55
614.34:356:55
714.34:356:55
814.34:366:55
914.34:366:55
1014.34:376:54
1114.34:376:54
1214.34:386:54
1314.24:386:53
1414.24:396:53
1514.24:406:53
1614.24:406:52
1714.24:416:52
1814.24:426:51
1914.14:426:51
2014.14:436:50
2114.14:446:50
2214.14:446:49
2314.14:456:48
2414.04:466:48
2514.04:476:47
2614.04:476:46
2714.04:486:46
2813.94:496:45
2913.94:506:44
3013.94:506:43
3113.94:516:42

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.6 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.07 kWh/m² in May across the year — July's 4.6 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.7Bright
204.7Bright
214.7Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
305.0Bright
315.0Bright
Planning a trip in July

Hazard calendar for Ōjima

In seasonPeak

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

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

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

Is July a good time to visit Ōjima?

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

4.9
Sightseeing
7th-best month of the year
6.2
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Ōjima for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ōjima in July

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

In July, Ōjima sees daytime highs around 29°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Ōjima in July

The nearest coast averages about 23°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Ōjima 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 Ōjima peaks around August 10 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highModerateAug 10UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ōjima 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 Ōjima 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 Ōjima?

Ōjima sits at 35.7°N, 139.8°E, 7 m above sea level, in Japan. The nearest listed city is Hirai, 2.0 km away.

Topography around Ōjima

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

Within 3 km, the terrain around Ōjima has only modest variations in elevation — a maximum elevation change of 35 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,718 m.

The land around Ōjima is covered by artificial surfaces (80%) within 3 km, artificial surfaces (66%) and water (26%) within 16 km, and trees (34%), artificial surfaces (26%) and water (21%) within 80 km.

3 km
35 m
16 km
75 m
80 km
1,718 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Hirai 2.0 km · Tōyō 3.0 km · Funabori 3.0 km · Edogawe 4.0 km · Ichinoe 4.0 km · Asakusa 5.0 km · Sumida 5.0 km · Katsushika 5.0 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 Ōjima (35.6892°, 139.8328°, elevation 7 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).