Saiki weather in May

In May, Saiki sees average daytime highs of 22°C and overnight lows near 17°C, with 151 mm of rain across 10.4 wet days and about 13.7 hours of daylight. It is the 6th-warmest and 6th-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 29% 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 hours by month's end. Set against the rest of the year, May is Saiki's 10th-clearest and 9th-windiest month. For the whole year in context, see Saiki's year-round climate.

Daytime high
22°
6th warmest
Overnight low
17°
7th coldest
Rainfall
151 mm
10.4 wet days
Daylight
13 h 42 min
5:18 AM – 6:59 PM
Cloud cover
64%
10th clearest
Wind
14 km/h
9th windiest
Solar energy
5.54 kWh/m²
Travel score
6.5
out of 10

Saiki is city in Ōita Prefecture, Japan.

Density
74/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 Saiki reaches about 22°C in the afternoon and slips back to 17°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 20°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)
12015
22115
32115
42116
52116
62116
72116
82116
92116
102116
112217
122217
132217
142217
152217
162217
172217
182217
192217
202218
212218
222318
232318
242318
252318
262318
272318
282319
292319
302319
312319

How May really feels in Saiki

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.

Saiki weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 626.710.12.8
Feb11° / 717.910.83.0
Mar14° / 11010.611.74.2
Apr18° / 13°12910.312.85.9
May22° / 17°15110.413.76.5
Jun25° / 21°29715.514.15.6
Jul28° / 25°19814.1145.2
Aug29° / 26°16614.713.24.8
Sep27° / 23°21513.612.26.0
Oct22° / 18°161911.27.1
Nov18° / 13°907.710.36.1
Dec13° / 6879.94.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34456
44555
54456
64357
74357
84258
94159
104159
114159
124159
134258
144159
154159
164159
174060
184159
194159
204159
214060
224060
234060
244060
253961
263961
273862
283664
293664
303565
313565

Chance of precipitation in May

Any precipitation

Saiki gets around 151 mm of rain over 10.4 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 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
233
333
433
533
633
733
834
934
1034
1134
1234
1334
1434
1534
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2734
2834
2935
3035
3136

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
145331750
243341850
341341960
439352060
538352170
636352270
734352370
833352480
932352580
1031352690
1130352790
1228352890
1327352990
1426343090
15253431100
16243432100
17233433100
18223334110
19203335110
20193236121
21183237131
22173138131
23153139141
24143039161
25132940171
26122841181
27112742201
28102642221
2982442241
3082342262
3172142282

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

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light 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 18 min at the start of May to 14 hours 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 5:10 AM, and sunset from 6:48 PM to 7:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:316:48
213.35:306:49
313.35:296:50
413.45:286:50
513.45:276:51
613.45:266:52
713.55:256:53
813.55:246:53
913.55:236:54
1013.55:236:55
1113.65:226:56
1213.65:216:56
1313.65:206:57
1413.65:196:58
1513.75:196:59
1613.75:186:59
1713.75:177:00
1813.75:177:01
1913.85:167:02
2013.85:157:02
2113.85:157:03
2213.85:147:04
2313.85:147:04
2413.95:137:05
2513.95:127:06
2613.95:127:06
2713.95:127:07
2813.95:117:08
2914.05:117:08
3014.05:107:09
3114.05:107:10

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.54 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.52 kWh/m² to a high of 5.54 kWh/m² in May across the year — May's 5.54 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
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
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Saiki

In seasonPeak

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

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

Saiki's rainy season runs May–October, 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 Saiki?

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 Saiki for sightseeing.

What to pack for Saiki in May

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

In May, Saiki sees daytime highs around 22°C and nights near 17°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Saiki in May

The nearest coast averages about 20°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 23 km away) is warmest in August at about 27°C and coldest in February near 17°C.

It's comfortable for a long swim from May 11 to Dec 14 — about 7.2 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar17Cool
Apr18Cool
May20Refreshing
Jun23Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Warm
Nov22Refreshing
Dec20Cool

UV index in Saiki 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 Saiki peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 22UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun11Extreme
Jul10Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Saiki 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 Saiki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodApr 1523 µg/m³Oct 1611 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul16Moderate
Aug16Moderate
Sep12Moderate
Oct11Good
Nov12Moderate
Dec12Good
Location & terrain

Where is Saiki?

Saiki sits at 33.0°N, 131.9°E, 3 m above sea level, in Japan. The nearest listed city is Tsukumiura, 14 km away.

Topography around Saiki

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

Within 3 km, the terrain around Saiki has significant variations in elevation — a maximum elevation change of 300 m around an average of 44 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 716 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,758 m.

The land around Saiki is covered by trees (47%) and artificial surfaces (27%) within 3 km, trees (64%) and water (30%) within 16 km, and water (50%) and trees (45%) within 80 km.

3 km
300 m
16 km
716 m
80 km
1,758 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Tsukumiura 14 km · Usuki 21 km · Mie 30 km · Tsurusaki 38 km · Ōita 42 km · Nobeoka 46 km · Takedamachi 47 km · Beppu 52 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 Saiki (32.95°, 131.9°, elevation 3 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).