Minamibōsō weather in April

In April, Minamibōsō sees average daytime highs of 16°C and overnight lows near 13°C, with 143 mm of rain across 12.1 wet days and about 12.9 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 18°C by the end. The sky is clear or mostly clear about 35% 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 24 min by month's end. Set against the rest of the year, April is Minamibōsō's 6th-clearest and 5th-windiest month. For the whole year in context, see Minamibōsō's year-round climate.

Daytime high
16°
8th warmest
Overnight low
13°
5th coldest
Rainfall
143 mm
12.1 wet days
Daylight
12 h 54 min
5:14 AM – 6:07 PM
Cloud cover
59%
6th clearest
Wind
24 km/h
5th windiest
Solar energy
4.99 kWh/m²
Travel score
4.8
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 18°C by the end.

A typical April day in Minamibōsō reaches about 16°C in the afternoon and slips back to 13°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 18°C. Set against its neighbours, April runs about 3°C warmer than March and about 3°C cooler than May.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11511
21511
31511
41511
51511
61511
71512
81512
91512
101612
111612
121612
131613
141613
151613
161613
171613
181613
191713
201714
211714
221714
231714
241714
251714
261714
271715
281815
291815
301815

Minamibōsō weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 104109.92.6
Feb11° / 10410.710.72.5
Mar13° / 17614.911.73.3
Apr16° / 13°14312.112.94.8
May19° / 17°15811.513.85.9
Jun22° / 20°22013.714.35.7
Jul25° / 23°14911.514.16.5
Aug26° / 25°1039.513.36.7
Sep25° / 23°21114.612.26.0
Oct21° / 18°25314.511.15.9
Nov17° / 14°16013.410.25.2
Dec13° / 103119.73.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% 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 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64852
74852
84852
94852
104852
114753
124654
134654
144654
154555
164555
174555
184555
194555
204555
214555
224555
234555
244654
254555
264654
274654
284654
294654
304654

Chance of precipitation in April

Any precipitation

Minamibōsō gets around 143 mm of rain over 12.1 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 41% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
246
346
446
545
645
745
844
944
1043
1143
1242
1342
1442
1542
1641
1741
1841
1940
2040
2139
2239
2338
2438
2537
2637
2736
2836
2935
3035

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1891010
2881110
3871210
4861310
5851410
6841510
7831610
8811720
9801820
10801820
11791920
12772030
13762130
14762130
15742240
16732340
17722440
18712450
19692551
20682651
21662761
22642871
23632971
24613081
25593191
265732101
275532121
285333131
295134141
304934161

Wind in April

Winds average 24 km/h in April.

Across April, daily wind ranges from about 22 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1923breezy
2023breezy
2123breezy
2223breezy
2323breezy
2423breezy
2523breezy
2623breezy
2723breezy
2823breezy
2923breezy
3022breezy

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 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 5:35 AM to 4:57 AM, and sunset from 5:55 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:355:55
212.45:345:56
312.45:325:56
412.45:315:57
512.55:295:58
612.55:285:59
712.65:266:00
812.65:256:00
912.65:246:01
1012.75:226:02
1112.75:216:03
1212.75:206:04
1312.85:186:05
1412.85:176:05
1512.85:156:06
1612.95:146:07
1712.95:136:08
1813.05:116:09
1913.05:106:09
2013.05:096:10
2113.15:086:11
2213.15:066:12
2313.15:056:13
2413.25:046:13
2513.25:036:14
2613.25:016:15
2713.35:006:16
2813.34:596:17
2913.34:586:18
3013.44:576:18

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.99 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.49 kWh/m² in August across the year — April's 4.99 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.1Bright
225.1Bright
235.2Bright
245.2Bright
255.2Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.4Bright
Planning a trip in April

Hazard calendar for Minamibōsō

In seasonPeak

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

Minamibōsō 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 Minamibōsō?

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

4.8
Sightseeing
8th-best month of the year
0.8
Beach & pool
8th-best month of the year

April is a reasonable time to visit Minamibōsō for sightseeing.

What to pack for Minamibōsō in April

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

In April, Minamibōsō sees daytime highs around 16°C and nights near 13°C. Worth packing: a warm layer, rain gear, sun protection and a windbreaker. About 12 days see rain.

a warm layerrain gearsun protectiona windbreaker

Sea temperature near Minamibōsō in April

The nearest coast averages about 17°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 February near 15°C.

It's comfortable for a long swim from May 31 to Nov 24 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Minamibōsō in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Minamibōsō peaks around August 10 at about 10 (extreme) — 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 highExtremeVery highHighModerateAug 10UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Minamibōsō 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 Minamibōsō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (September, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1322 µg/m³Sep 911 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep11Good
Oct14Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Minamibōsō?

Minamibōsō sits at 35.0°N, 139.9°E, 66 m above sea level, in Japan. The nearest listed city is Tateyama, 8.0 km away.

Topography around Minamibōsō

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

Within 3 km, the terrain around Minamibōsō has only modest variations in elevation — a maximum elevation change of 242 m around an average of 61 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 404 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,220 m.

The land around Minamibōsō is covered by trees (68%) and cropland (23%) within 3 km, trees (49%) and water (40%) within 16 km, and water (64%) within 80 km.

3 km
242 m
16 km
404 m
80 km
1,220 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Tateyama 8.0 km · Kamogawa 17 km · Kurihama 30 km · Miura 30 km · Futtsu 33 km · Kimitsu 36 km · Yokosuka 37 km · Katsuura 38 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 Minamibōsō (35.0313°, 139.9265°, elevation 66 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).