Ōkawa weather in June

In June, Ōkawa sees average daytime highs of 26°C and overnight lows near 19°C, with 372 mm of rain across 16.6 wet days and about 14.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 11% of the time in June, and the air most often feels muggy.

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

Daytime high
26°
4th warmest
Overnight low
19°
9th coldest
Rainfall
372 mm
16.6 wet days
Daylight
14 h 12 min
5:13 AM – 7:24 PM
Cloud cover
80%
12th clearest
Wind
7 km/h
12th windiest
Solar energy
4.31 kWh/m²
Travel score
5.3
out of 10

Ōkawa is city in Fukuoka Prefecture, Japan.

Density
1,166/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

Day-to-day highs hold fairly steady near 26°C through the month.

A typical June day in Ōkawa reaches about 26°C in the afternoon and slips back to 19°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 30°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°35°151015202530
Avg high (°C)Avg low (°C)
12617
22617
32617
42617
52618
62618
72618
82618
92618
102618
112619
122619
132619
142619
152619
162619
172620
182620
192620
202720
212720
222720
232721
242721
252721
262721
272721
282721
292722
302722

How June really feels in Ōkawa

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.

Ōkawa weather by month

How June compares with the rest of the year at a glance. June is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 6180.710.12.3
Feb11° / 808.60.410.82.8
Mar15° / 12811.30.111.74.3
Apr20° / 10°14711.3012.85.9
May24° / 15°17011013.76.6
Jun26° / 19°37216.6014.25.3
Jul30° / 23°33417.50144.2
Aug31° / 24°17514.3013.24.0
Sep28° / 20°18012012.25.7
Oct23° / 14°1067.8011.27.3
Nov18° / 898.1010.35.9
Dec12° / 707.50.19.83.4

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% 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 (%)
13367
23367
33367
43169
53169
63070
72872
82872
92773
102674
112575
122377
132278
142179
152179
162080
171882
181882
191882
201783
211684
221684
231585
241486
251486
261486
271486
281486
291486
301585

Chance of precipitation in June

Any precipitation

Ōkawa gets around 372 mm of rain over 16.6 wet days in June, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 55% and peaks near 73% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
136
237
338
439
540
641
742
843
944
1046
1147
1249
1351
1452
1554
1656
1757
1859
1961
2062
2164
2266
2367
2469
2570
2671
2772
2872
2973
3073

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11630361710
21429371820
31228381920
41127392130
5925402240
6824402440
7722412550
8521412760
9419412870
10317403081
113163932101
122143834111
132133735121
141123537141
151103338161
16193140171
17182941192
18072842212
19072542232
20062342263
21052142283
22051942314
23041741335
24031541366
25031340387
26021138408
27021037439
28028354510
29017344711
30016324912

Wind in June

Winds average 7 km/h in June, the calmest month.

Across June, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
309calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 hours at the start of June to 14 h 12 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 5:15 AM to 5:16 AM, and sunset from 7:17 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:157:17
214.05:157:17
314.15:157:18
414.15:147:19
514.15:147:19
614.15:147:20
714.15:147:20
814.15:147:21
914.15:137:21
1014.15:137:22
1114.15:137:22
1214.25:137:23
1314.25:137:23
1414.25:137:23
1514.25:137:24
1614.25:137:24
1714.25:137:25
1814.25:137:25
1914.25:147:25
2014.25:147:25
2114.25:147:26
2214.25:147:26
2314.25:147:26
2414.25:157:26
2514.25:157:27
2614.25:157:27
2714.25:157:27
2814.25:167:27
2914.25:167:27
3014.25:167:27

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.31 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.24 kWh/m² in May across the year — June's 4.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.5Bright
134.5Bright
144.4Bright
154.4Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in June

Hazard calendar for Ōkawa

In seasonPeak

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

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

Ōkawa's rainy season runs May–September, 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 June a good time to visit Ōkawa?

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

5.3
Sightseeing
6th-best month of the year
5.2
Beach & pool
6th-best month of the year

June is a reasonable time to visit Ōkawa for sightseeing.

What to pack for Ōkawa in June

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

In June, Ōkawa sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Ōkawa in June

The nearest coast averages about 22°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 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Ōkawa in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ōkawa peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Ōkawa 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 Ōkawa is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ōkawa?

Ōkawa sits at 33.2°N, 130.4°E, 4 m above sea level, in Japan. The nearest listed city is Yanagawa, 5.0 km away.

Topography around Ōkawa

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

Within 3 km, the terrain around Ōkawa has only modest variations in elevation — a maximum elevation change of 15 m around an average of 3 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 355 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,685 m.

The land around Ōkawa is covered by artificial surfaces (46%) and cropland (39%) within 3 km, cropland (45%), artificial surfaces (25%) and water (20%) within 16 km, and trees (49%) and water (32%) within 80 km.

3 km
15 m
16 km
355 m
80 km
1,685 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Yanagawa 5.0 km · Saga 8.0 km · Setakamachi-takayanagi 11 km · Chikugo 11 km · Kanzakimachi-kanzaki 11 km · Nakatsukuma 15 km · Miyama 15 km · Hirokawa 17 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 Ōkawa (33.2057°, 130.3753°, elevation 4 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).