Ōtsuki weather in April

In April, Ōtsuki sees average daytime highs of 16°C and overnight lows near 6°C, with 158 mm of precipitation across 14.3 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 26% 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 Ōtsuki's 6th-clearest and 1st-windiest month. For the whole year in context, see Ōtsuki's year-round climate.

Daytime high
16°
7th warmest
Overnight low
6th coldest
Precipitation
158 mm
14.3 wet days
Daylight
12 h 54 min
5:17 AM – 6:11 PM
Cloud cover
66%
6th clearest
Wind
6 km/h
1st windiest
Solar energy
4.85 kWh/m²
Travel score
4.2
out of 10

Ōtsuki is city in Yamanashi Prefecture, Japan.

Density
86/km²
people per km²
Founded
1954

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 13°C in the first days to 18°C by the end.

A typical April day in Ōtsuki reaches about 16°C in the afternoon and slips back to 6°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 21°C. Set against its neighbours, April runs about 6°C warmer than March and about 4°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1133
2133
3133
4134
5144
6144
7144
8144
9145
10155
11155
12155
13155
14156
15156
16166
17166
18166
19167
20167
21167
22177
23177
24178
25178
26178
27178
28188
29188
30189

How April really feels in Ōtsuki

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.

Ōtsuki weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°818.85.89.90.4
Feb / -3°879.96.210.70.7
Mar10° / 15815.15.111.72.0
Apr16° / 15814.30.812.94.2
May20° / 11°16814.9013.95.4
Jun23° / 16°22918.4014.45.0
Jul27° / 20°23019.8014.24.9
Aug27° / 21°18719.1013.35.0
Sep24° / 17°24917.2012.25.4
Oct18° / 11°24615.3011.15.1
Nov13° / 11311.30.110.13.7
Dec / 789.32.39.61.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34357
44357
54456
64258
74258
84159
94258
104060
114060
124060
133862
143763
153763
163664
173565
183565
193664
203664
213664
223664
233763
243763
253763
263763
273763
283763
293763
303763

Chance of precipitation in April

Any precipitationSnow

Ōtsuki gets around 158 mm of rain and snow over 14.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 48% and peaks near 50% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1507
2507
3506
4506
5505
6505
7505
8504
9494
10494
11493
12493
13493
14493
15492
16492
17492
18492
19492
20482
21481
22471
23471
24461
25461
26451
27450
28440
29440
30430

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
810000
99910
109910
119910
129910
139910
149910
159910
169910
179820
189820
199721
209721
219721
229631
239631
249631
259541
269541
279451
289451
299361
309271

Wind in April

Winds average 6 km/h in April, the windiest month of the year.

Across April, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:39 AM to 5:00 AM, and sunset from 5:59 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:395:59
212.45:376:00
312.45:366:01
412.55:346:01
512.55:336:02
612.55:316:03
712.65:306:04
812.65:286:05
912.65:276:05
1012.75:266:06
1112.75:246:07
1212.85:236:08
1312.85:216:09
1412.85:206:10
1512.95:196:10
1612.95:176:11
1712.95:166:12
1813.05:156:13
1913.05:136:14
2013.05:126:15
2113.15:116:16
2213.15:096:16
2313.25:086:17
2413.25:076:18
2513.25:066:19
2613.35:046:20
2713.35:036:21
2813.35:026:21
2913.45:016:22
3013.45:006:23

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.85 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.16 kWh/m² in May across the year — April's 4.85 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.6Bright
34.6Bright
44.6Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.9Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in April

Hazard calendar for Ōtsuki

In seasonPeak

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

Ōtsuki 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 Ōtsuki?

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

4.2
Sightseeing
7th-best month of the year
0.6
Beach & pool
7th-best month of the year

April is a reasonable time to visit Ōtsuki for sightseeing.

What to pack for Ōtsuki in April

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

In April, Ōtsuki sees daytime highs around 16°C and nights near 6°C. Pack rain gear. Worth having: a warm layer and sun protection. About 14 days see rain.

rain geara warm layersun protection

Sea temperature near Ōtsuki 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 at the nearest coast (about 57 km away) 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 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Ōtsuki 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 Ōtsuki peaks around July 16 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highModerateJul 16UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Very high
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Ōtsuki 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 Ōtsuki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Ōtsuki?

Ōtsuki sits at 35.6°N, 139.0°E, 360 m above sea level, in Japan. The nearest listed city is Tsuru, 10 km away.

Topography around Ōtsuki

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

Within 3 km, the terrain around Ōtsuki has large variations in elevation — a maximum elevation change of 737 m around an average of 476 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,836 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Ōtsuki is covered by trees (82%) within 3 km, trees (94%) within 16 km, and trees (60%) and artificial surfaces (20%) within 80 km.

3 km
737 m
16 km
1,836 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Tsuru 10 km · Uenohara 13 km · Kōshū 22 km · Enzan 24 km · Sagamihara 25 km · Itsukaichi 25 km · Fujiyoshida 26 km · Yamanashi 26 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 Ōtsuki (35.6185°, 138.974°, elevation 360 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).