Sanyōonoda weather in May

In May, Sanyōonoda sees average daytime highs of 21°C and overnight lows near 16°C, with 166 mm of rain across 10.2 wet days and about 13.7 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 31% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 18 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Sanyōonoda's 7th-clearest and 8th-windiest month. For the whole year in context, see Sanyōonoda's year-round climate.

Daytime high
21°
6th warmest
Overnight low
16°
7th coldest
Rainfall
166 mm
10.2 wet days
Daylight
13 h 48 min
5:19 AM – 7:05 PM
Cloud cover
61%
7th clearest
Wind
12 km/h
8th windiest
Solar energy
5.52 kWh/m²
Travel score
6.5
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 23°C by the end.

A typical May day in Sanyōonoda reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 24°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)
11914
22014
32014
42014
52014
62015
72015
82015
92015
102115
112115
122115
132115
142116
152116
162116
172116
182116
192216
202216
212216
222217
232217
242217
252217
262217
272217
282317
292318
302318
312318

How May really feels in Sanyōonoda

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.

Sanyōonoda weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 7310.81.3101.8
Feb10° / 8110.41.110.72.1
Mar13° / 13311.50.211.73.4
Apr17° / 12°14710.7012.85.3
May21° / 16°16610.2013.76.5
Jun25° / 20°26914.1014.25.9
Jul28° / 24°25614.50145.1
Aug30° / 25°14111.9013.34.9
Sep27° / 22°16211.4012.26.2
Oct22° / 17°1007.8011.17.1
Nov17° / 12°868.4010.25.5
Dec12° / 74110.39.82.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% 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
34753
44753
54654
64555
74555
84456
94456
104357
114357
124456
134357
144357
154357
164357
174357
184357
194357
204357
214357
224357
234357
244258
254258
264258
274159
284159
294060
303961
314060

Chance of precipitation in May

Any precipitation

Sanyōonoda gets around 166 mm of rain over 10.2 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 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
432
532
633
733
833
933
1033
1133
1233
1333
1432
1532
1632
1732
1832
1932
2032
2133
2233
2333
2433
2533
2633
2733
2833
2933
3033
3134

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 37% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1603091
25831101
35632111
45632111
55333122
65234122
75035132
84936142
94736142
104637152
114538153
124338163
134139173
144040173
153841183
163642203
173442213
183243233
193043243
202843264
212642284
222442304
232241324
242140345
251939365
261838386
271637407
281535437
291433459
3012314610
3111294811

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 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 48 minutes over May. Sunrise moves from 5:32 AM to 5:10 AM, and sunset from 6:53 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:326:53
213.45:316:54
313.45:306:54
413.45:296:55
513.55:286:56
613.55:276:57
713.55:266:58
813.55:256:58
913.65:246:59
1013.65:247:00
1113.65:237:01
1213.75:227:01
1313.75:217:02
1413.75:207:03
1513.75:197:04
1613.85:197:05
1713.85:187:05
1813.85:177:06
1913.85:177:07
2013.95:167:08
2113.95:157:08
2213.95:157:09
2313.95:147:10
2413.95:147:10
2514.05:137:11
2614.05:137:12
2714.05:127:12
2814.05:127:13
2914.05:117:14
3014.15:117:14
3114.15:107:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.52 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 5.52 kWh/m² in May across the year — May's 5.52 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
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Sanyōonoda

In seasonPeak

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

Sanyōonoda 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 Sanyōonoda?

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
4.0
Beach & pool
6th-best month of the year

May is a reasonable time to visit Sanyōonoda for sightseeing.

What to pack for Sanyōonoda in May

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

In May, Sanyōonoda sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Sanyōonoda in May

The nearest coast averages about 17°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 18 km away) is warmest in August at about 27°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 6 to Nov 10 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec16Cool

UV index in Sanyōonoda 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 Sanyōonoda peaks around June 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 20UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr8Very high
May8Very high
Jun10Very high
Jul9Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sanyōonoda 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 Sanyōonoda is worst in March — around 27 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2026 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar27Moderate
Apr24Moderate
May21Moderate
Jun18Moderate
Jul16Moderate
Aug19Moderate
Sep13Moderate
Oct12Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Sanyōonoda?

Sanyōonoda sits at 34.0°N, 131.2°E, 33 m above sea level, in Japan. The nearest listed city is Onoda, 4.0 km away.

Topography around Sanyōonoda

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

Within 3 km, the terrain around Sanyōonoda has only modest variations in elevation — a maximum elevation change of 147 m around an average of 30 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 475 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,205 m.

The land around Sanyōonoda is covered by trees (55%) and artificial surfaces (20%) within 3 km, trees (51%) and water (30%) within 16 km, and water (49%) and trees (42%) within 80 km.

3 km
147 m
16 km
475 m
80 km
1,205 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Onoda 4.0 km · Ube 13 km · Mine 18 km · Shimonoseki 22 km · Ogōri-shimogō 23 km · Kanda 32 km · Yamaguchi 33 km · Kitakyushu 35 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 Sanyōonoda (34.0325°, 131.1603°, elevation 33 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).