Ōarai weather in June

In June, Ōarai sees average daytime highs of 23°C and overnight lows near 18°C, with 159 mm of rain across 14.1 wet days and about 14.4 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 24°C by the end. The sky is clear or mostly clear about 12% of the time in June, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of June to 14 h 30 min by month's end. Set against the rest of the year, June is Ōarai's 12th-clearest and 10th-windiest month. For the whole year in context, see Ōarai's year-round climate.

Daytime high
23°
4th warmest
Overnight low
18°
9th coldest
Rainfall
159 mm
14.1 wet days
Daylight
14 h 30 min
4:24 AM – 6:52 PM
Cloud cover
78%
12th clearest
Wind
12 km/h
10th windiest
Solar energy
4.89 kWh/m²
Travel score
5.7
out of 10

Ōarai is town in Higashiibaraki District, Ibaraki Prefecture, Japan.

Density
661/km²
people per km²
Founded
1954

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 24°C by the end.

A typical June day in Ōarai reaches about 23°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, June runs about 3°C warmer than May and about 3°C cooler than July.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12117
22117
32117
42117
52117
62217
72217
82217
92218
102218
112218
122218
132218
142218
152218
162218
172319
182319
192319
202319
212319
222319
232319
242319
252320
262420
272420
282420
292420
302420

How June really feels in Ōarai

Once humidity and wind are folded in, June 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

June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ōarai weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 737.61.39.81.7
Feb / 718.11.610.61.8
Mar12° / 126130.911.72.9
Apr16° / 10°12412.40.112.94.7
May20° / 15°14812.6013.95.8
Jun23° / 18°15914.1014.45.7
Jul26° / 22°16214.9014.25.7
Aug28° / 23°11112.1013.46.0
Sep25° / 21°17614.1012.26.0
Oct20° / 16°21313.5011.15.8
Nov16° / 11°10610.5010.14.8
Dec11° / 718.60.29.62.9

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of June, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23169
33070
42971
52872
62773
72773
82575
92575
102476
112377
122278
132179
142179
151981
161981
171882
181882
191882
201882
211882
221882
231882
241882
251882
261882
271882
281882
291981
301981

Chance of precipitation in June

Any precipitation

Ōarai gets around 159 mm of rain over 14.1 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
138
238
338
439
540
641
742
843
944
1045
1146
1248
1349
1450
1551
1651
1752
1852
1952
2052
2152
2252
2353
2453
2553
2654
2754
2854
2954
3055

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the humid band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
118373950
217364160
315364270
414354380
512334590
6113246111
7103147121
882948141
972848161
1062649171
1152549201
1242350221
1342150242
1431949262
1531849292
1621648312
1721547343
1821445364
1911344384
2011242405
2111140417
2211038438
2319364410
2418344511
2518324613
2617304715
2716284817
2816264819
2915254822
3015234724

Wind in June

Winds average 12 km/h in June.

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

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 18 min at the start of June to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:27 AM to 4:27 AM, and sunset from 6:44 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:276:44
214.34:266:44
314.34:266:45
414.34:266:46
514.34:256:46
614.44:256:47
714.44:256:47
814.44:256:48
914.44:256:49
1014.44:246:49
1114.44:246:50
1214.44:246:50
1314.44:246:50
1414.44:246:51
1514.54:246:51
1614.54:246:52
1714.54:246:52
1814.54:246:52
1914.54:246:53
2014.54:246:53
2114.54:256:53
2214.54:256:53
2314.54:256:54
2414.54:256:54
2514.54:266:54
2614.54:266:54
2714.54:266:54
2814.54:266:54
2914.54:276:54
3014.54:276:54

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.89 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.38 kWh/m² in May across the year — June's 4.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in June

Hazard calendar for Ōarai

In seasonPeak

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

Ōarai 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 June a good time to visit Ōarai?

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

5.7
Sightseeing
5th-best month of the year
4.2
Beach & pool
4th-best month of the year

June is a reasonable time to visit Ōarai for sightseeing.

What to pack for Ōarai in June

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

In June, Ōarai sees daytime highs around 23°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Ōarai in June

The nearest coast averages about 19°C in June — 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 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Ōarai in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June 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 Ōarai peaks around July 24 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 highModerateJul 24UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ōarai in June

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ōarai is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Ōarai?

Ōarai sits at 36.3°N, 140.6°E, 22 m above sea level, in Japan. The nearest listed city is Katsuta, 9.0 km away.

Topography around Ōarai

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

Within 3 km, the terrain around Ōarai has only modest variations in elevation — a maximum elevation change of 45 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 64 m; within 80 km, large variations in elevation — a maximum elevation change of 1,005 m.

The land around Ōarai is covered by water (56%) within 3 km, water (50%) within 16 km, and trees (36%), water (29%) and cropland (20%) within 80 km.

3 km
45 m
16 km
64 m
80 km
1,005 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Katsuta 9.0 km · Hitachi-Naka 10 km · Mito 13 km · Inada 15 km · Okunoya 15 km · Funaishikawa 17 km · Tokai 18 km · Hokota 19 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 Ōarai (36.3141°, 140.5839°, elevation 22 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).