Tateyama weather in April

In April, Tateyama sees average daytime highs of 16°C and overnight lows near 14°C, with 135 mm of rain across 11.6 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 Tateyama's 7th-clearest and 5th-windiest month. For the whole year in context, see Tateyama's year-round climate.

Daytime high
16°
8th warmest
Overnight low
14°
5th coldest
Rainfall
135 mm
11.6 wet days
Daylight
12 h 54 min
5:14 AM – 6:07 PM
Cloud cover
59%
7th clearest
Wind
25 km/h
5th windiest
Solar energy
4.97 kWh/m²
Travel score
5.0
out of 10

Tateyama is city in Chiba Prefecture, Japan.

Density
455/km²
people per km²
Founded
1939

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 15°C in the first days to 18°C by the end.

A typical April day in Tateyama reaches about 16°C in the afternoon and slips back to 14°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
21512
31512
41512
51512
61612
71612
81612
91613
101613
111613
121613
131613
141613
151613
161714
171714
181714
191714
201714
211714
221715
231715
241715
251715
261815
271815
281815
291815
301816

Tateyama 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° / 969.59.93.0
Feb11° / 969.910.72.9
Mar14° / 10°16214.111.73.6
Apr16° / 14°13511.612.95.0
May19° / 17°14810.913.86.0
Jun22° / 20°2101314.35.8
Jul25° / 23°14610.714.16.6
Aug26° / 25°100913.36.8
Sep25° / 23°19513.312.26.2
Oct22° / 19°24113.511.16.1
Nov18° / 15°13811.910.25.6
Dec14° / 10°8810.19.74.2

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 53%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
25050
35050
45050
55050
65050
75050
84951
94852
104852
114852
124852
134753
144753
154654
164654
174654
184555
194654
204654
214654
224555
234654
244654
254753
264654
274654
284555
294555
304555

Chance of precipitation in April

Any precipitation

Tateyama gets around 135 mm of rain over 11.6 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 39% and peaks near 43% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
143
243
343
443
543
642
742
841
941
1040
1140
1240
1339
1439
1539
1639
1739
1839
1939
2038
2138
2237
2337
2437
2536
2636
2735
2835
2934
3033

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 (%)
190910
2891010
3871210
4861310
5851410
6841510
7831610
8811720
9801820
10791920
11791920
12772030
13762130
14752140
15742240
16732340
17722350
18712450
19682561
20682561
21662671
22652771
23632881
24612991
255930101
265731111
275432131
285233141
295133151
304934171

Wind in April

Winds average 25 km/h in April.

Across April, daily wind ranges from about 24 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
126breezy
226breezy
326breezy
426breezy
526breezy
626breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2224breezy
2324breezy
2424breezy
2524breezy
2624breezy
2724breezy
2824breezy
2924breezy
3024breezy

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 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:355:55
212.45:345:56
312.45:325:57
412.45:315:57
512.55:305:58
612.55:285:59
712.65:276:00
812.65:256:01
912.65:246:01
1012.75:236:02
1112.75:216:03
1212.75:206:04
1312.85:186:05
1412.85:176:06
1512.85:166:06
1612.95:146:07
1712.95:136:08
1813.05:126:09
1913.05:106:10
2013.05:096:10
2113.15:086:11
2213.15:076:12
2313.15:056:13
2413.25:046:14
2513.25:036:14
2613.25:026:15
2713.35:016:16
2813.34:596:17
2913.34:586:18
3013.44:576:19

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.97 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.41 kWh/m² in May across the year — April's 4.97 kWh/m² falls in the middle.

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
124.8Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.1Bright
225.1Bright
235.1Bright
245.2Bright
255.2Bright
265.2Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Tateyama

In seasonPeak

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

Tateyama 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 Tateyama?

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

5.0
Sightseeing
8th-best month of the year
0.9
Beach & pool
8th-best month of the year

April is a reasonable time to visit Tateyama for sightseeing.

What to pack for Tateyama in April

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

In April, Tateyama sees daytime highs around 16°C and nights near 14°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 Tateyama 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 16°C.

It's comfortable for a long swim from May 25 to Dec 4 — about 6.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Refreshing
Aug26Warm
Sep26Warm
Oct24Refreshing
Nov22Refreshing
Dec19Cool

UV index in Tateyama 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 Tateyama peaks around August 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (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 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Tateyama 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 Tateyama is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Tateyama?

Tateyama sits at 35.0°N, 139.9°E, 7 m above sea level, in Japan. The nearest listed city is Minamibōsō, 8.0 km away.

Topography around Tateyama

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

Within 3 km, the terrain around Tateyama has only modest variations in elevation — a maximum elevation change of 159 m around an average of 31 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 354 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,372 m.

The land around Tateyama is covered by trees (45%) and artificial surfaces (26%) within 3 km, water (59%) and trees (32%) within 16 km, and water (66%) within 80 km.

3 km
159 m
16 km
354 m
80 km
1,372 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Minamibōsō 8.0 km · Kamogawa 25 km · Miura 28 km · Kurihama 31 km · Futtsu 37 km · Yokosuka 38 km · Kimitsu 41 km · Hayama 42 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 Tateyama (34.9833°, 139.8667°, elevation 7 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).