Yachi weather in May

In May, Yachi sees average daytime highs of 19°C and overnight lows near 10°C, with 99 mm of rain across 12.3 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 21°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 30 min by month's end. Set against the rest of the year, May is Yachi's 3rd-clearest and 7th-windiest month. For the whole year in context, see Yachi's year-round climate.

Daytime high
19°
5th warmest
Overnight low
10°
8th coldest
Rainfall
99 mm
12.3 wet days
Daylight
14 h 06 min
4:33 AM – 6:37 PM
Cloud cover
67%
3rd clearest
Wind
8 km/h
7th windiest
Solar energy
5.26 kWh/m²
Travel score
5.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 21°C by the end.

A typical May day in Yachi reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 24°C. Set against its neighbours, May runs about 6°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1177
2177
3177
4178
5178
6188
7188
8188
9189
10189
11189
12189
13189
14199
151910
161910
171910
181910
191910
202010
212011
222011
232011
242011
252011
262111
272112
282112
292112
302112
312112

How May really feels in Yachi

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.

Yachi weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°13522.623.99.60.0
Feb / -4°9618.618.710.50.0
Mar / -1°11417.712.611.70.5
Apr13° / 9813.72.6133.3
May19° / 10°9912.3014.15.6
Jun22° / 15°12012.5014.66.0
Jul26° / 19°19317.1014.45.4
Aug27° / 20°15115.1013.55.6
Sep23° / 16°12813.3012.35.9
Oct17° / 12513.60115.0
Nov11° / 10916.949.92.2
Dec / -2°13621.4179.40.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

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

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
43961
53961
63862
73862
83763
93763
103763
113763
123862
133763
143763
153862
163763
173862
183961
193961
203961
213961
223961
234060
244060
254060
264060
274060
284060
293961
303961
313862

Chance of precipitation in May

Any precipitation

Yachi gets around 99 mm of rain over 12.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
142
241
341
441
541
641
741
841
941
1041
1142
1242
1342
1442
1542
1642
1742
1842
1941
2041
2140
2239
2338
2438
2537
2636
2735
2835
2934
3034
3134

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 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19640
29640
39640
49640
59640
69550
79550
89451
99451
109451
119361
129361
139361
149271
159271
169181
179091
1889101
1988111
2086131
2185141
2283152
2381172
2480182
2578202
2676222
2775232
2872253
2971263
3068284
3166304

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 4:49 AM to 4:23 AM, and sunset from 6:23 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.64:496:23
213.64:476:24
313.74:466:25
413.74:456:26
513.74:446:27
613.84:436:28
713.84:426:29
813.84:406:30
913.94:396:31
1013.94:386:32
1113.94:376:33
1214.04:366:34
1314.04:356:35
1414.04:346:36
1514.04:346:36
1614.14:336:37
1714.14:326:38
1814.14:316:39
1914.24:306:40
2014.24:296:41
2114.24:296:42
2214.24:286:43
2314.34:276:43
2414.34:266:44
2514.34:266:45
2614.34:256:46
2714.44:256:47
2814.44:246:48
2914.44:246:48
3014.44:236:49
3114.54:236:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.26 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.76 kWh/m² to a high of 5.26 kWh/m² in May across the year — May's 5.26 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Yachi

In seasonPeak

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

Yachi 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 Yachi?

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

5.6
Sightseeing
3rd-best month of the year
2.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Yachi for sightseeing.

What to pack for Yachi in May

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

In May, Yachi sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Yachi in May

The nearest coast averages about 14°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 64 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 24 to Oct 27 — about 4.1 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct21Refreshing
Nov18Cool
Dec15Bracing

UV index in Yachi in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yachi peaks around August 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 15UV 9Dec 22UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Yachi 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 Yachi is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1622 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Yachi?

Yachi sits at 38.4°N, 140.3°E, 89 m above sea level, in Japan. The nearest listed city is Sagae, 6.0 km away.

Topography around Yachi

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

Within 3 km, the terrain around Yachi has only modest variations in elevation — a maximum elevation change of 243 m around an average of 102 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,393 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,209 m.

The land around Yachi is covered by cropland (51%), trees (21%) and artificial surfaces (21%) within 3 km, trees (63%) and cropland (22%) within 16 km, and trees (73%) within 80 km.

3 km
243 m
16 km
1,393 m
80 km
2,209 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Sagae 6.0 km · Higashine 8.0 km · Tendō 9.0 km · Murayama 11 km · Yamagata 22 km · Obanazawa 22 km · Kaminoyama 30 km · Shinjō 37 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 Yachi (38.4219°, 140.3083°, elevation 89 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).