Anan weather in May

In May, Anan sees average daytime highs of 20°C and overnight lows near 18°C, with 165 mm of rain across 10.6 wet days and about 13.7 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels humid.

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 Anan's 10th-clearest and 9th-windiest month. For the whole year in context, see Anan's year-round climate.

Daytime high
20°
6th warmest
Overnight low
18°
7th coldest
Rainfall
165 mm
10.6 wet days
Daylight
13 h 48 min
5:05 AM – 6:50 PM
Cloud cover
63%
10th clearest
Wind
19 km/h
9th windiest
Solar energy
5.53 kWh/m²
Travel score
6.1
out of 10

Anan is city in Tokushima Prefecture, Japan.

Density
252/km²
people per km²
Founded
1958

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 19°C in the first days to 21°C by the end.

A typical May day in Anan reaches about 20°C in the afternoon and slips back to 18°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 21°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11816
21816
31916
41916
51916
61917
71917
81917
91917
101917
111917
121917
131917
141917
152017
162018
172018
182018
192018
202018
212018
222018
232018
242019
252119
262119
272119
282119
292119
302119
312119

Anan weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 789.5102.6
Feb11° / 8410.210.72.7
Mar14° / 10°12811.711.73.8
Apr17° / 14°13710.612.85.3
May20° / 18°16510.613.76.1
Jun23° / 21°24313.814.25.8
Jul26° / 25°18711.8146.3
Aug27° / 26°1149.413.36.6
Sep26° / 24°22113.512.26.2
Oct22° / 20°21211.211.16.6
Nov18° / 15°1048.610.25.9
Dec13° / 10°8489.83.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44654
54654
64555
74456
84357
94357
104258
114258
124159
134159
144159
154357
164357
174357
184357
194357
204456
214456
224456
234357
244357
254258
264258
274159
284159
294060
304060
313763

Chance of precipitation in May

Any precipitation

Anan gets around 165 mm of rain over 10.6 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 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
334
434
534
635
735
835
935
1035
1135
1235
1335
1435
1534
1634
1733
1833
1932
2032
2132
2232
2331
2431
2531
2631
2731
2832
2932
3033
3133

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14235203
24036213
33836223
43636244
53536254
63336264
73236274
83036285
92937295
102837305
112737315
122637326
132437336
142337346
152237356
162037376
171937387
181836397
191636408
201535428
211434439
2213334410
2312324511
2411314612
2510304714
269284815
278274817
288264819
297244821
306234823
316214825

Wind in May

Winds average 19 km/h in May.

Across May, daily wind ranges from about 17 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
420breezy
520breezy
620breezy
720breezy
820breezy
920light breeze
1020light breeze
1120light breeze
1220light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2917light breeze
3017light breeze
3117light breeze

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 5:19 AM to 4:57 AM, and sunset from 6:39 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:196:39
213.45:176:39
313.45:166:40
413.45:156:41
513.55:146:42
613.55:136:43
713.55:136:43
813.55:126:44
913.65:116:45
1013.65:106:46
1113.65:096:47
1213.75:086:47
1313.75:076:48
1413.75:066:49
1513.75:066:50
1613.85:056:50
1713.85:046:51
1813.85:046:52
1913.85:036:53
2013.95:026:53
2113.95:026:54
2213.95:016:55
2313.95:006:55
2413.95:006:56
2514.04:596:57
2614.04:596:58
2714.04:586:58
2814.04:586:59
2914.04:577:00
3014.14:577:00
3114.14:577:01

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.53 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.53 kWh/m² in May across the year — May's 5.53 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
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Anan

In seasonPeak

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

Anan 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 Anan?

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

6.1
Sightseeing
5th-best month of the year
3.0
Beach & pool
6th-best month of the year

May is a reasonable time to visit Anan for sightseeing.

What to pack for Anan in May

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

In May, Anan sees daytime highs around 20°C and nights near 18°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Anan in May

The nearest coast averages about 19°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 21 km away) is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 24 to Dec 2 — about 6.3 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Warm
Nov22Refreshing
Dec19Cool

UV index in Anan 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 Anan peaks around July 10 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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Very high
Jul10Extreme
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Anan 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 Anan is worst in April — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1319 µg/m³Dec 1310 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar19Moderate
Apr19Moderate
May17Moderate
Jun14Moderate
Jul10Good
Aug10Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Anan?

Anan sits at 33.9°N, 134.7°E, 12 m above sea level, in Japan. The nearest listed city is Komatsushimachō, 11 km away.

Topography around Anan

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

Within 3 km, the terrain around Anan has significant variations in elevation — a maximum elevation change of 285 m around an average of 27 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 778 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,908 m.

The land around Anan is covered by cropland (32%), trees (29%) and artificial surfaces (28%) within 3 km, water (48%) and trees (37%) within 16 km, and water (50%) and trees (43%) within 80 km.

3 km
285 m
16 km
778 m
80 km
1,908 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Komatsushimachō 11 km · Tokushima 18 km · Ishii 25 km · Takabō 26 km · Yakami 28 km · Narutochō-mitsuishi 32 km · Kamojimachō-jōgejima 32 km · Yoshinogawa 36 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 Anan (33.9167°, 134.65°, elevation 12 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).