Hakone weather in April

In April, Hakone sees average daytime highs of 16°C and overnight lows near 8°C, with 181 mm of precipitation across 14.4 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 14°C in the first days to 18°C by the end. The sky is clear or mostly clear about 25% 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 Hakone's 7th-clearest and 1st-windiest month. For the whole year in context, see Hakone's year-round climate.

Daytime high
16°
7th warmest
Overnight low
6th coldest
Precipitation
181 mm
14.4 wet days
Daylight
12 h 54 min
5:18 AM – 6:11 PM
Cloud cover
67%
7th clearest
Wind
7 km/h
1st windiest
Solar energy
4.92 kWh/m²
Travel score
4.5
out of 10

Hakone is town in Ashigarashimo district, Kanagawa prefecture, Japan.

Density
122/km²
people per km²
Founded
1956

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 14°C in the first days to 18°C by the end.

A typical April day in Hakone reaches about 16°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 21°C. Set against its neighbours, April runs about 5°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1145
2145
3146
4146
5156
6156
7156
8156
9157
10157
11167
12167
13168
14168
15168
16168
17178
18178
19179
20179
21179
22179
23189
241810
251810
261810
271810
281810
291910
301911

How April really feels in Hakone

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.

Hakone 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 / 949.74.69.91.1
Feb / 10610.9510.71.2
Mar11° / 18015.63.411.72.5
Apr16° / 18114.40.512.94.5
May21° / 13°19114.4013.85.6
Jun23° / 17°23518014.35.1
Jul28° / 21°23517.9014.14.9
Aug29° / 22°18416.5013.34.8
Sep25° / 19°26016.7012.25.5
Oct20° / 13°25115.5011.15.4
Nov15° / 13112.4010.14.1
Dec10° / 8810.219.72.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34357
44357
54357
64357
74357
84159
94258
104258
114159
123961
133862
143862
153763
163664
173664
183664
193664
203565
213565
223565
233664
243664
253763
263763
273664
283763
293862
303862

Chance of precipitation in April

Any precipitationSnow

Hakone gets around 181 mm of rain and snow over 14.4 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 (%)
1485
2485
3485
4484
5484
6484
7483
8483
9483
10483
11482
12492
13492
14492
15502
16501
17501
18501
19501
20501
21491
22490
23490
24480
25480
26470
27470
28460
29460
30450

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 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19910
29820
39820
49820
59820
69820
79820
89631
99631
109631
119631
129631
139541
149541
159541
169541
179451
189352
199352
209262
219172
229172
239082
248992
2588102
2687112
2786122
2885132
2984142
3082153

Wind in April

Winds average 7 km/h in April, the windiest month of the year.

Across April, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:58 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:395:58
212.45:375:59
312.45:366:00
412.45:346:01
512.55:336:02
612.55:316:03
712.65:306:03
812.65:296:04
912.65:276:05
1012.75:266:06
1112.75:246:07
1212.75:236:07
1312.85:226:08
1412.85:206:09
1512.85:196:10
1612.95:186:11
1712.95:166:12
1813.05:156:12
1913.05:146:13
2013.05:126:14
2113.15:116:15
2213.15:106:16
2313.15:086:16
2413.25:076:17
2513.25:066:18
2613.25:056:19
2713.35:046:20
2813.35:026:21
2913.35:016:21
3013.45:006:22

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.92 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 5.27 kWh/m² in May across the year — April's 4.92 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
Planning a trip in April

Hazard calendar for Hakone

In seasonPeak

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

Hakone 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 Hakone?

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

4.5
Sightseeing
7th-best month of the year
0.9
Beach & pool
7th-best month of the year

April is a reasonable time to visit Hakone for sightseeing.

What to pack for Hakone in April

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

In April, Hakone sees daytime highs around 16°C and nights near 8°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 Hakone 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 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 Hakone 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 Hakone peaks around July 20 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 highHighModerateJul 20UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Hakone 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 Hakone 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 Hakone?

Hakone sits at 35.2°N, 139.0°E, 0 m above sea level, in Japan. The nearest listed city is Yugawara, 6.0 km away.

Topography around Hakone

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

Within 3 km, the terrain around Hakone has large variations in elevation — a maximum elevation change of 627 m around an average of 811 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,429 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,736 m.

The land around Hakone is covered by trees (81%) within 3 km, trees (63%) within 16 km, and trees (44%) and water (40%) within 80 km.

3 km
627 m
16 km
1,429 m
80 km
3,736 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Yugawara 6.0 km · Susono 11 km · Atami 12 km · Kamizawa 12 km · Nakatogari 13 km · Mishima 13 km · Odawara 14 km · Fushimi 14 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 Hakone (35.1895°, 139.0265°, elevation 0 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).