Hagi weather in May

In May, Hagi sees average daytime highs of 22°C and overnight lows near 15°C, with 135 mm of rain across 10.8 wet days and about 13.8 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 32% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Hagi's 4th-clearest and 7th-windiest month. For the whole year in context, see Hagi's year-round climate.

Daytime high
22°
5th warmest
Overnight low
15°
7th coldest
Rainfall
135 mm
10.8 wet days
Daylight
13 h 48 min
5:17 AM – 7:04 PM
Cloud cover
61%
4th clearest
Wind
12 km/h
7th windiest
Solar energy
5.66 kWh/m²
Travel score
6.5
out of 10

Hagi is city in Yamaguchi Prefecture, Japan.

Density
64/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 23°C by the end.

A typical May day in Hagi reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12013
22013
32113
42113
52113
62114
72114
82114
92114
102114
112214
122214
132214
142215
152215
162215
172215
182215
192215
202315
212315
222315
232316
242316
252316
262316
272316
282316
292316
302417
312417

How May really feels in Hagi

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.

Hagi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9014.13.6101.4
Feb10° / 8512.63.110.71.8
Mar13° / 126130.911.73.4
Apr18° / 10°12111.1012.85.5
May22° / 15°13510.8013.86.5
Jun25° / 19°22414.1014.35.9
Jul29° / 23°26915.6014.14.8
Aug30° / 24°16913.5013.34.4
Sep27° / 21°18912.9012.26.0
Oct22° / 15°1039.3011.16.9
Nov16° / 10°909.9010.25.2
Dec11° / 9113.41.69.72.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 10% of May, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34654
44654
54555
64456
74456
84357
94357
104258
114357
124357
134159
144159
154159
164258
174258
184159
194159
204159
214258
224258
234159
244258
254159
264159
274159
284159
294060
304060
313961

Chance of precipitation in May

Any precipitation

Hagi gets around 135 mm of rain over 10.8 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 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
736
836
936
1036
1135
1235
1335
1435
1534
1634
1734
1834
1934
2034
2134
2234
2334
2434
2534
2634
2734
2834
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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1712081
2702181
3682192
4672292
5662392
66523102
76424102
86424102
96325102
106225103
116126103
125927113
135828113
145729113
155630113
165631112
175432122
185233132
195134132
204835142
214735153
224536163
234337183
244137193
253938203
263738223
273538243
283238264
293038274
302838295
312637316

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912calm
2012calm
2112calm
2212calm
2312calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:31 AM to 5:08 AM, and sunset from 6:52 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:316:52
213.45:306:53
313.45:296:54
413.55:286:55
513.55:276:56
613.55:266:56
713.55:256:57
813.65:246:58
913.65:236:59
1013.65:227:00
1113.75:217:00
1213.75:207:01
1313.75:197:02
1413.75:187:03
1513.85:187:03
1613.85:177:04
1713.85:167:05
1813.85:157:06
1913.95:157:07
2013.95:147:07
2113.95:137:08
2213.95:137:09
2314.05:127:10
2414.05:127:10
2514.05:117:11
2614.05:117:12
2714.05:107:12
2814.15:107:13
2914.15:097:14
3014.15:097:14
3114.15:087:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.66 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 5.66 kWh/m² in May across the year — May's 5.66 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in May

Hazard calendar for Hagi

In seasonPeak

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

Hagi sits in the Pacific typhoon belt; the season peaks July–October.

Hagi's rainy season runs March–September, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Hagi?

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

6.5
Sightseeing
2nd-best month of the year
4.5
Beach & pool
6th-best month of the year

May is a reasonable time to visit Hagi for sightseeing.

What to pack for Hagi in May

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

In May, Hagi sees daytime highs around 22°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Hagi in May

The nearest coast averages about 18°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 25 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 9 to Nov 20 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Hagi 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 Hagi peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 23UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Hagi 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 Hagi is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1023 µg/m³Oct 1111 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr23Moderate
May20Moderate
Jun16Moderate
Jul13Moderate
Aug15Moderate
Sep11Good
Oct11Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Hagi?

Hagi sits at 34.4°N, 131.4°E, 31 m above sea level, in Japan. The nearest listed city is Nagato, 20 km away.

Topography around Hagi

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

Within 3 km, the terrain around Hagi has significant variations in elevation — a maximum elevation change of 442 m around an average of 112 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 779 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Hagi is covered by trees (66%) and artificial surfaces (23%) within 3 km, trees (67%) and water (28%) within 16 km, and water (55%) and trees (40%) within 80 km.

3 km
442 m
16 km
779 m
80 km
1,369 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Nagato 20 km · Yamaguchi 25 km · Mine 30 km · Ogōri-shimogō 33 km · Hōfu 41 km · Sanyōonoda 47 km · Onoda 49 km · Masuda 50 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 Hagi (34.4°, 131.4167°, elevation 31 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).