Yakumo weather in May

In May, Yakumo sees average daytime highs of 11°C and overnight lows near 7°C, with 116 mm of precipitation across 11.6 wet days and about 14.4 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 9°C in the first days to 14°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 48 min by month's end. Set against the rest of the year, May is Yakumo's 3rd-clearest and 8th-windiest month. For the whole year in context, see Yakumo's year-round climate.

Daytime high
11°
6th warmest
Overnight low
7th coldest
Precipitation
116 mm
11.6 wet days
Daylight
14 h 24 min
4:23 AM – 6:47 PM
Cloud cover
62%
3rd clearest
Wind
14 km/h
8th windiest
Solar energy
5.4 kWh/m²
Travel score
2.7
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 9°C in the first days to 14°C by the end.

A typical May day in Yakumo reaches about 11°C in the afternoon and slips back to 7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 14°C. Set against its neighbours, May runs about 5°C warmer than April and about 5°C cooler than June.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
184
284
394
494
595
695
795
895
9105
10105
11106
12106
13106
14116
15117
16117
17117
18127
19128
20128
21128
22138
23139
24139
25139
26139
271410
281410
291410
301410
311410

How May really feels in Yakumo

Once humidity and wind are folded in, May 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

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Yakumo weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 4th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44852
54654
64654
74555
84555
94357
104357
114258
124357
134357
144258
154258
164258
174258
184258
194258
204357
214357
224456
234456
244456
254555
264456
274555
284555
294555
304555
314357

Chance of precipitation in May

Any precipitationSnow

Yakumo gets around 116 mm of rain and snow over 11.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 38% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1372
2371
3371
4371
5371
6371
7370
8370
9380
10380
11380
12380
13380
14380
15390
16390
17390
18390
19390
20380
21380
22380
23380
24380
25370
26370
27370
28370
29370
30370
31360

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May 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%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
26991
27991
28991
29982
30973
31964

Wind in May

Winds average 14 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 4:42 AM to 4:12 AM, and sunset from 6:30 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:426:30
213.94:406:32
313.94:396:33
413.94:386:34
514.04:366:35
614.04:356:36
714.14:346:37
814.14:336:38
914.14:316:39
1014.24:306:40
1114.24:296:42
1214.24:286:43
1314.34:276:44
1414.34:266:45
1514.44:246:46
1614.44:236:47
1714.44:226:48
1814.54:216:49
1914.54:206:50
2014.54:206:51
2114.64:196:52
2214.64:186:53
2314.64:176:54
2414.64:166:55
2514.74:156:56
2614.74:156:57
2714.74:146:58
2814.84:136:59
2914.84:136:59
3014.84:127:00
3114.84:127:01

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.4 kWh/m² — the sunniest month for solar.

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 — May's 5.4 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Yakumo

In seasonPeak

In May, 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 May a good time to visit Yakumo?

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

2.7
Sightseeing
6th-best month of the year
0.0
Beach & pool
6th-best month of the year

May is a weaker month for outdoor sightseeing in Yakumo.

What to pack for Yakumo in May

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

In May, Yakumo sees daytime highs around 11°C and nights near 7°C. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Yakumo in May

The nearest coast averages about 9°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).