Itogawa weather in April

In April, Itogawa sees average daytime highs of 17°C and overnight lows near 11°C, with 139 mm of rain across 11.3 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 19°C by the end. The sky is clear or mostly clear about 34% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 18 min by month's end. Set against the rest of the year, April is Itogawa's 4th-clearest and 5th-windiest month. For the whole year in context, see Itogawa's year-round climate.

Daytime high
17°
7th warmest
Overnight low
11°
6th coldest
Rainfall
139 mm
11.3 wet days
Daylight
12 h 48 min
5:34 AM – 6:25 PM
Cloud cover
57%
4th clearest
Wind
15 km/h
5th windiest
Solar energy
5.31 kWh/m²
Travel score
5.4
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 19°C by the end.

A typical April day in Itogawa reaches about 17°C in the afternoon and slips back to 11°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1159
2159
3159
4169
5169
61610
71610
81610
91610
101710
111710
121711
131711
141711
151711
161811
171811
181812
191812
201812
211812
221812
231912
241913
251913
261913
271913
281913
292013
302013

How April really feels in Itogawa

Once humidity and wind are folded in, April 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

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Itogawa weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8711.22.3101.8
Feb10° / 9410.8210.72.1
Mar13° / 13812.80.311.73.5
Apr17° / 11°13911.3012.85.4
May21° / 16°16011013.76.3
Jun24° / 20°26514.9014.25.7
Jul28° / 24°22414.30145.3
Aug29° / 25°13213013.35.0
Sep27° / 22°19113.3012.25.9
Oct22° / 16°19511.1011.16.6
Nov17° / 11°1108.7010.25.5
Dec12° / 91101.19.83.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75248
85347
95347
105248
115149
125149
135050
145050
154951
164852
174852
184753
194753
204753
214753
224753
234654
244654
254654
264654
274753
284654
294654
304753

Chance of precipitation in April

Any precipitation

Itogawa gets around 139 mm of rain over 11.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
239
338
438
538
638
738
838
938
1039
1139
1239
1340
1440
1540
1640
1740
1840
1940
2039
2139
2238
2338
2437
2537
2636
2735
2835
2934
3034

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
193520
292620
392620
491720
591720
689830
789830
888930
988930
10871030
11861031
12851131
13851221
14841321
15831421
16821431
17811531
18801631
19791731
20791731
21771841
22761941
23742051
24732151
25712261
26692371
27672481
28672481
29642592
306325102

Wind in April

Winds average 15 km/h in April.

Across April, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over April. Sunrise moves from 5:54 AM to 5:17 AM, and sunset from 6:13 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:546:13
212.45:536:14
312.45:516:15
412.45:506:15
512.55:496:16
612.55:476:17
712.55:466:18
812.65:446:19
912.65:436:19
1012.65:426:20
1112.75:406:21
1212.75:396:22
1312.75:386:22
1412.85:366:23
1512.85:356:24
1612.85:346:25
1712.95:326:25
1812.95:316:26
1913.05:306:27
2013.05:296:28
2113.05:276:29
2213.15:266:29
2313.15:256:30
2413.15:246:31
2513.25:236:32
2613.25:226:32
2713.25:206:33
2813.25:196:34
2913.35:186:35
3013.35:176:36

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.31 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.59 kWh/m² in May across the year — April's 5.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in April

Hazard calendar for Itogawa

In seasonPeak

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

Itogawa 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 April a good time to visit Itogawa?

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

5.4
Sightseeing
6th-best month of the year
1.6
Beach & pool
7th-best month of the year

April is a reasonable time to visit Itogawa for sightseeing.

What to pack for Itogawa in April

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

In April, Itogawa sees daytime highs around 17°C and nights near 11°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Itogawa in April

The nearest coast averages about 16°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 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 May 31 to Nov 23 — about 5.8 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb14Bracing
Mar15Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Itogawa in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Itogawa peaks around June 23 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 highModerateJun 23UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug7High
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Itogawa in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Itogawa 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 Itogawa?

Itogawa sits at 34.0°N, 135.3°E, 129 m above sea level, in Japan. The nearest listed city is Arida, 14 km away.

Topography around Itogawa

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

Within 3 km, the terrain around Itogawa has significant variations in elevation — a maximum elevation change of 599 m around an average of 261 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 946 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,879 m.

The land around Itogawa is covered by trees (95%) within 3 km, trees (82%) within 16 km, and trees (47%) and water (43%) within 80 km.

3 km
599 m
16 km
946 m
80 km
1,879 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Arida 14 km · Kainan 14 km · Gobō 18 km · Minato 23 km · Wakayama 24 km · Iwade 26 km · Kinokawa 31 km · Hannan 34 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 Itogawa (34.0262°, 135.2528°, elevation 129 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).