Ryōtsu-minato weather in April

In April, Ryōtsu-minato sees average daytime highs of 13°C and overnight lows near 8°C, with 89 mm of precipitation across 12.2 wet days and about 13 hours of daylight. It is the 8th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 15°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 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Ryōtsu-minato's 2nd-clearest and 7th-windiest month. For the whole year in context, see Ryōtsu-minato's year-round climate.

Daytime high
13°
8th warmest
Overnight low
5th coldest
Precipitation
89 mm
12.2 wet days
Daylight
13 hours
5:17 AM – 6:16 PM
Cloud cover
60%
2nd clearest
Wind
14 km/h
7th windiest
Solar energy
5.29 kWh/m²
Travel score
3.5
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 11°C in the first days to 15°C by the end.

A typical April day in Ryōtsu-minato reaches about 13°C in the afternoon and slips back to 8°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 17°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°C cooler than May.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
1116
2116
3116
4117
5117
6127
7127
8127
9127
10128
11128
12138
13138
14138
15138
16138
17149
18149
19149
20149
21149
22149
231510
241510
251510
261510
271510
281610
291611
301611

How April really feels in Ryōtsu-minato

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.

Ryōtsu-minato weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 13221.49.89.70.2
Feb / 9117.68.210.50.3
Mar / 10116.23.311.71.4
Apr13° / 8912.20.2133.5
May18° / 13°92110145.8
Jun22° / 18°12410.5014.66.4
Jul26° / 22°20514.3014.45.8
Aug28° / 24°14612.1013.55.6
Sep25° / 21°14212.5012.36.2
Oct19° / 15°13613.20115.7
Nov14° / 10°13717.30.19.93.3
Dec / 15421.64.89.41.1

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 17% of April, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34753
44753
54753
64852
74852
84753
94852
104753
114852
124852
134753
144852
154852
164852
174753
184753
194753
204852
214753
224852
234852
244852
254852
264951
274852
284852
294852
304852

Chance of precipitation in April

Any precipitationSnow

Ryōtsu-minato gets around 89 mm of rain and snow over 12.2 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 47% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1474
2474
3473
4463
5463
6462
7452
8451
9451
10441
11441
12431
13420
14420
15410
16410
17400
18390
19390
20380
21380
22380
23370
24370
25370
26370
27370
28370
29370
30370

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24982
25982
26973
27973
28964
29955
30955

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 5:40 AM to 4:58 AM, and sunset from 6:02 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:406:02
212.45:386:03
312.55:376:04
412.55:356:05
512.55:346:06
612.65:326:07
712.65:306:08
812.75:296:08
912.75:276:09
1012.75:266:10
1112.85:246:11
1212.85:236:12
1312.95:216:13
1412.95:206:14
1512.95:186:15
1613.05:176:16
1713.05:156:17
1813.15:146:18
1913.15:136:19
2013.15:116:20
2113.25:106:21
2213.25:086:22
2313.35:076:23
2413.35:066:24
2513.35:046:25
2613.45:036:25
2713.45:026:26
2813.45:006:27
2913.54:596:28
3013.54:586:29

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.29 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 5.85 kWh/m² in May across the year — April's 5.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.9Bright
44.9Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.4Bright
205.4Bright
215.4Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in April

Hazard calendar for Ryōtsu-minato

In seasonPeak

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

Ryōtsu-minato 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 April a good time to visit Ryōtsu-minato?

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

3.5
Sightseeing
7th-best month of the year
0.1
Beach & pool
8th-best month of the year

April is a weaker month for outdoor sightseeing in Ryōtsu-minato.

What to pack for Ryōtsu-minato in April

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

In April, Ryōtsu-minato sees daytime highs around 13°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Ryōtsu-minato in April

The nearest coast averages about 11°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 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 24 to Oct 29 — about 4.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr11Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Ryōtsu-minato in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ryōtsu-minato peaks around August 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 14UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Ryōtsu-minato 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 Ryōtsu-minato is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1220 µg/m³Oct 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr20Moderate
May18Moderate
Jun14Moderate
Jul12Moderate
Aug10Good
Sep9Good
Oct9Good
Nov10Good
Dec9Good
Location & terrain

Where is Ryōtsu-minato?

Ryōtsu-minato sits at 38.1°N, 138.4°E, 4 m above sea level, in Japan. The nearest listed city is Sado, 9.0 km away.

Topography around Ryōtsu-minato

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

Within 3 km, the terrain around Ryōtsu-minato has only modest variations in elevation — a maximum elevation change of 102 m around an average of 11 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,155 m; within 80 km, large variations in elevation — a maximum elevation change of 1,125 m.

The land around Ryōtsu-minato is covered by water (50%) and trees (23%) within 3 km, trees (55%) and water (34%) within 16 km, and water (78%) within 80 km.

3 km
102 m
16 km
1,155 m
80 km
1,125 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Sado 9.0 km · Maki 53 km · Niigata 55 km · Yoshida-kasugachō 59 km · Shirone 62 km · Tsubame 63 km · Kameda-honchō 63 km · Niitsu-honchō 67 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 Ryōtsu-minato (38.0782°, 138.4394°, 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).