Yanagawa weather in April

In April, Yanagawa sees average daytime highs of 20°C and overnight lows near 10°C, with 147 mm of rain across 11.3 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 22°C by the end. The sky is clear or mostly clear about 31% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 18 min by month's end. Set against the rest of the year, April is Yanagawa's 5th-clearest and 4th-windiest month. For the whole year in context, see Yanagawa's year-round climate.

Daytime high
20°
7th warmest
Overnight low
10°
6th coldest
Rainfall
147 mm
11.3 wet days
Daylight
12 h 48 min
5:54 AM – 6:43 PM
Cloud cover
62%
5th clearest
Wind
8 km/h
4th windiest
Solar energy
4.95 kWh/m²
Travel score
5.9
out of 10

Yanagawa is city in Fukuoka Prefecture, Japan.

Density
836/km²
people per km²
Founded
2005

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 22°C by the end.

A typical April day in Yanagawa reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 23°C. Set against its neighbours, April runs about 5°C warmer than March and about 4°C cooler than May.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1178
2178
3188
4188
5188
6188
7189
8189
9199
10199
11199
12199
131910
141910
152010
162010
172010
182010
192010
202011
212111
222111
232111
242111
252111
262112
272112
282212
292212
302212

How April really feels in Yanagawa

Once humidity and wind are folded in, April 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

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

Yanagawa weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-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°37216.6014.15.3
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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24456
34357
44456
54357
64357
74159
84258
94258
104159
114159
124159
134159
144159
154159
164159
174159
184258
194357
204357
214456
224456
234555
244555
254456
264456
274456
284456
294456
304456

Chance of precipitation in April

Any precipitation

Yanagawa gets around 147 mm of rain over 11.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
537
637
737
837
937
1037
1137
1237
1338
1438
1538
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2638
2737
2837
2937
3036

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
189830
289830
388930
487940
587940
6861040
7851050
8841150
9841150
10841150
11831250
12831250
13811351
14811351
15791461
16791461
17781561
18781561
19771661
20761761
21741871
22721972
23702082
24692182
25672292
266523102
276324103
286224113
296125113
305926123

Wind in April

Winds average 8 km/h in April.

Across April, daily wind ranges from about 8 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over April. Sunrise moves from 6:14 AM to 5:38 AM, and sunset from 6:32 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:146:32
212.36:126:33
312.46:116:34
412.46:106:34
512.46:086:35
612.56:076:36
712.56:066:37
812.56:046:37
912.66:036:38
1012.66:026:39
1112.76:006:40
1212.75:596:40
1312.75:586:41
1412.85:576:42
1512.85:556:43
1612.85:546:43
1712.95:536:44
1812.95:526:45
1912.95:506:45
2013.05:496:46
2113.05:486:47
2213.05:476:48
2313.05:456:48
2413.15:446:49
2513.15:436:50
2613.15:426:51
2713.25:416:51
2813.25:406:52
2913.25:396:53
3013.35:386:54

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.95 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 — April's 4.95 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.7Bright
54.7Bright
64.7Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.2Bright
Planning a trip in April

Hazard calendar for Yanagawa

In seasonPeak

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

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

Yanagawa'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 April a good time to visit Yanagawa?

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

5.9
Sightseeing
3rd-best month of the year
2.9
Beach & pool
7th-best month of the year

April is a reasonable time to visit Yanagawa for sightseeing.

What to pack for Yanagawa in April

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

In April, Yanagawa sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Yanagawa in April

The nearest coast averages about 16°C in April — 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 Yanagawa in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yanagawa 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 Yanagawa in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Yanagawa 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 Yanagawa?

Yanagawa sits at 33.2°N, 130.4°E, 1 m above sea level, in Japan. The nearest listed city is Ōkawa, 5.0 km away.

Topography around Yanagawa

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

Within 3 km, the terrain around Yanagawa has only modest variations in elevation — a maximum elevation change of 10 m around an average of 3 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 406 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,762 m.

The land around Yanagawa is covered by cropland (47%) and artificial surfaces (46%) within 3 km, cropland (37%), water (26%) and artificial surfaces (22%) within 16 km, and trees (51%) and water (29%) within 80 km.

3 km
10 m
16 km
406 m
80 km
1,762 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Ōkawa 5.0 km · Setakamachi-takayanagi 6.0 km · Chikugo 10 km · Miyama 11 km · Saga 12 km · Ōmuta 16 km · Kanzakimachi-kanzaki 16 km · Hirokawa 16 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 Yanagawa (33.1667°, 130.4°, elevation 1 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).