Uchiko weather in May

In May, Uchiko sees average daytime highs of 23°C and overnight lows near 13°C, with 169 mm of rain across 11.7 wet days and about 13.7 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 24°C by the end. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels dry.

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 Uchiko's 10th-clearest and 6th-windiest month. For the whole year in context, see Uchiko's year-round climate.

Daytime high
23°
5th warmest
Overnight low
13°
8th coldest
Rainfall
169 mm
11.7 wet days
Daylight
13 h 42 min
5:14 AM – 6:58 PM
Cloud cover
65%
10th clearest
Wind
8 km/h
6th windiest
Solar energy
5.45 kWh/m²
Travel score
6.4
out of 10

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 24°C by the end.

A typical May day in Uchiko reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°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)
12111
22111
32111
42112
52212
62212
72212
82212
92212
102212
112213
122213
132213
142313
152313
162313
172313
182313
192314
202314
212314
222314
232314
242414
252414
262414
272415
282415
292415
302415
312415

How May really feels in Uchiko

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.

Uchiko 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 / -0°6710.74.7101.3
Feb / 8310.43.510.81.8
Mar13° / 12712.5111.73.5
Apr18° / 14411.30.112.85.6
May23° / 13°16911.7013.76.4
Jun25° / 18°30116.8014.25.3
Jul29° / 22°26318.20144.3
Aug30° / 23°17917.2013.24.0
Sep27° / 19°20415.1012.25.5
Oct22° / 12°1539.3011.26.9
Nov16° / 868.60.110.35.3
Dec10° / 7910.62.69.82.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24456
34456
44357
54357
64258
74159
84159
93961
103862
113961
123862
133961
143862
153961
163961
173862
183961
193862
203763
213763
223862
233862
243664
253565
263565
273565
283367
293367
303169
313169

Chance of precipitation in May

Any precipitation

Uchiko gets around 169 mm of rain over 11.7 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 37% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
537
637
738
838
938
1038
1138
1238
1338
1438
1537
1637
1736
1836
1936
2036
2136
2236
2336
2436
2536
2636
2736
2837
2937
3038
3138

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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1751681
2741682
3721792
4721792
5711892
6691993
76819103
86819103
96720103
106720103
116720103
126621103
136621103
146621103
156522103
166422113
176422113
186323113
196223123
206124123
216024133
225925133
235726143
245627143
255428153
265328163
275029174
284830184
294531194
304232215
313933225

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
218calm
228calm
238calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 5:27 AM to 5:06 AM, and sunset from 6:46 PM to 7:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:276:46
213.35:266:47
313.45:256:48
413.45:246:48
513.45:236:49
613.55:226:50
713.55:216:51
813.55:206:52
913.55:196:52
1013.65:186:53
1113.65:186:54
1213.65:176:55
1313.75:166:55
1413.75:156:56
1513.75:146:57
1613.75:146:58
1713.85:136:58
1813.85:126:59
1913.85:127:00
2013.85:117:01
2113.85:107:01
2213.95:107:02
2313.95:097:03
2413.95:097:03
2513.95:087:04
2614.05:087:05
2714.05:077:05
2814.05:077:06
2914.05:067:07
3014.05:067:07
3114.05:067:08

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.45 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 5.45 kWh/m² in May across the year — May's 5.45 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
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.4Bright
305.3Bright
315.3Bright
Planning a trip in May

Hazard calendar for Uchiko

In seasonPeak

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

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

Uchiko's rainy season runs April–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 Uchiko?

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

6.4
Sightseeing
2nd-best month of the year
4.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Uchiko for sightseeing.

What to pack for Uchiko in May

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

In May, Uchiko sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Uchiko 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 offshore is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 11 to Nov 19 — about 5.3 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May17Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Uchiko in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Uchiko peaks around June 23 at about 10 (extreme) — 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Uchiko 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 Uchiko 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1523 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Uchiko?

Uchiko sits at 33.5°N, 132.6°E, 61 m above sea level, in Japan. The nearest listed city is Ōzu, 11 km away.

Topography around Uchiko

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

Within 3 km, the terrain around Uchiko has significant variations in elevation — a maximum elevation change of 498 m around an average of 138 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,110 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Uchiko is covered by trees (79%) within 3 km, trees (91%) within 16 km, and water (49%) and trees (47%) within 80 km.

3 km
498 m
16 km
1,110 m
80 km
1,895 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Ōzu 11 km · Yawatahama 22 km · Iyo 23 km · Uwa 24 km · Masaki-chō 27 km · Haramachi 28 km · Matsuyama 34 km · Shinagawa 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 Uchiko (33.5499°, 132.6471°, elevation 61 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).