Yakumo weather in April

In April, Yakumo sees average daytime highs of 6°C and overnight lows near 2°C, with 85 mm of precipitation across 10.5 wet days and about 13.1 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 4°C in the first days to 8°C by the end. The sky is clear or mostly clear about 36% 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 48 min by month's end. Set against the rest of the year, April is Yakumo's 2nd-clearest and 7th-windiest month. For the whole year in context, see Yakumo's year-round climate.

Daytime high
8th warmest
Overnight low
5th coldest
Precipitation
85 mm
10.5 wet days
Daylight
13 h 06 min
5:05 AM – 6:13 PM
Cloud cover
57%
2nd clearest
Wind
15 km/h
7th windiest
Solar energy
5.16 kWh/m²
Travel score
0.5
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 4°C in the first days to 8°C by the end.

A typical April day in Yakumo reaches about 6°C in the afternoon and slips back to 2°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 9°C. Set against its neighbours, April runs about 4°C warmer than March and about 5°C cooler than May.

-5°10°15°151015202530
Avg high (°C)Avg low (°C)
140
240
340
441
551
651
751
851
951
1051
1151
1261
1362
1462
1562
1662
1762
1862
1972
2072
2173
2273
2373
2473
2573
2683
2783
2884
2984
3084

How April really feels in Yakumo

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 28 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
28
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Yakumo 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 daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°6012.7179.30.0
Feb-1° / -4°569.912.410.30.0
Mar / -2°65118.811.60.0
Apr / 8510.52.313.10.5
May11° / 11611.6014.42.7
Jun16° / 13°11211.60154.8
Jul20° / 17°17214.8014.85.5
Aug22° / 19°20013.7013.76.0
Sep20° / 17°17613.1012.35.7
Oct14° / 10°11512.8010.83.7
Nov / 9712.94.79.60.6
Dec / -2°8413.614.790.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25248
35248
45248
55149
65149
75149
85149
95248
105248
115248
125248
135248
145149
155248
165248
175149
185149
195248
205248
215248
225248
235149
245248
255248
265248
275149
285149
295149
304951

Chance of precipitation in April

Any precipitationSnow

Yakumo gets around 85 mm of rain and snow over 10.5 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 35% and peaks near 37% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
13316
23315
33314
43313
53313
63312
73311
83311
93310
103310
11349
12349
13348
14348
15358
16357
17367
18367
19366
20366
21376
22375
23375
24374
25374
26374
27373
28373
29372
30372

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in April

Winds average 15 km/h in April.

Across April, daily wind ranges from about 14 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
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 5:31 AM to 4:43 AM, and sunset from 5:56 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:315:56
212.55:295:58
312.55:275:59
412.65:256:00
512.65:246:01
612.75:226:02
712.75:206:03
812.85:186:04
912.85:176:05
1012.95:156:07
1112.95:136:08
1213.05:126:09
1313.05:106:10
1413.05:086:11
1513.15:076:12
1613.15:056:13
1713.25:036:15
1813.25:026:16
1913.35:006:17
2013.34:586:18
2113.44:576:19
2213.44:556:20
2313.54:546:21
2413.54:526:23
2513.64:516:24
2613.64:496:25
2713.64:486:26
2813.74:466:27
2913.74:456:28
3013.84:436:29

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.16 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 5.4 kWh/m² in May across the year — April's 5.16 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.4Bright
305.4Bright
Planning a trip in April

Hazard calendar for Yakumo

In seasonPeak

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

Yakumo 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 Yakumo?

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

0.5
Sightseeing
8th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Yakumo.

What to pack for Yakumo in April

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

In April, Yakumo sees daytime highs around 6°C and nights near 2°C. Pack a warm layer. Worth having: a heavy coat, rain gear and sun protection. About 11 days see rain.

a warm layera heavy coatrain gearsun protection

Sea temperature near Yakumo in April

The nearest coast averages about 6°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 16 km away) is warmest in August at about 21°C and coldest in February near 4°C.

It's comfortable for a long swim from Aug 5 to Sep 17 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan7Bracing
Feb4Bracing
Mar4Bracing
Apr6Bracing
May9Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep20Refreshing
Oct17Cool
Nov12Bracing
Dec9Bracing

UV index in Yakumo in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yakumo peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May8Very high
Jun7High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Yakumo 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 Yakumo is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1417 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May15Moderate
Jun9Good
Jul8Good
Aug8Good
Sep7Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Yakumo?

Yakumo sits at 42.3°N, 140.3°E, 9 m above sea level, in Japan. The nearest listed city is Honchō, 53 km away.

Topography around Yakumo

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

Within 3 km, the terrain around Yakumo has only modest variations in elevation — a maximum elevation change of 85 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 963 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Yakumo is covered by cropland (49%) and water (22%) within 3 km, trees (59%) and water (30%) within 16 km, and water (54%) and trees (41%) within 80 km.

3 km
85 m
16 km
963 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Honchō 53 km · Date 55 km · Hokuto 57 km · Kamiiso 57 km · Muroran 60 km · Hakodate 66 km · Niseko 71 km · Noboribetsu 78 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 Yakumo (42.2539°, 140.2692°, elevation 9 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).