Masaki-chō weather in April

In April, Masaki-chō sees average daytime highs of 18°C and overnight lows near 10°C, with 133 mm of precipitation across 11 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 20°C by the end. The sky is clear or mostly clear about 35% 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 Masaki-chō's 4th-clearest and 7th-windiest month. For the whole year in context, see Masaki-chō's year-round climate.

Daytime high
18°
7th warmest
Overnight low
10°
6th coldest
Precipitation
133 mm
11 wet days
Daylight
12 h 48 min
5:44 AM – 6:35 PM
Cloud cover
58%
4th clearest
Wind
9 km/h
7th windiest
Solar energy
5.3 kWh/m²
Travel score
5.5
out of 10

Masaki-chō is town in Iyo district, Ehime prefecture, Japan.

Density
1,497/km²
people per km²
Founded
1922

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 20°C by the end.

A typical April day in Masaki-chō reaches about 18°C in the afternoon and slips back to 10°C overnight — a 8°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 5°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1157
2158
3168
4168
5168
6168
7168
8169
9179
10179
11179
12179
131710
141710
151810
161810
171810
181810
191810
201811
211911
221911
231911
241911
251911
261912
272012
282012
292012
302012

How April really feels in Masaki-chō

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.

Masaki-chō weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6911.33.3101.4
Feb / 7910.42.910.71.8
Mar13° / 11812.30.711.73.4
Apr18° / 10°133110.112.85.5
May22° / 15°15411.1013.76.4
Jun25° / 19°26815.7014.25.6
Jul29° / 23°23916.80144.7
Aug30° / 24°15615.8013.34.5
Sep27° / 20°18713.6012.25.9
Oct22° / 15°1419.4011.16.9
Nov16° / 839.1010.25.3
Dec11° / 8311.41.99.82.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
25149
35149
45050
55050
65050
75050
85050
94951
104852
114852
124753
134753
144852
154753
164753
174753
184753
194852
204852
214753
224753
234852
244951
254951
264951
274951
285050
294852
304852

Chance of precipitation in April

Any precipitation

Masaki-chō gets around 133 mm of rain and snow over 11 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 37% and peaks near 39% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
336
436
536
636
736
836
937
1037
1137
1238
1338
1439
1539
1639
1739
1839
1939
2039
2138
2238
2337
2437
2536
2636
2735
2835
2935
3035

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 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
195410
294510
394510
493610
592620
691720
791720
890820
990820
1090820
1189920
1289920
1389920
14881020
15881020
16871030
17861130
18861130
19861130
20841240
21831340
22831340
23821440
24801550
25791650
26781660
27761761
28741871
29731881
30721981

Wind in April

Winds average 9 km/h in April.

Across April, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:04 AM to 5:28 AM, and sunset from 6:23 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:046:23
212.46:036:24
312.46:026:25
412.46:006:25
512.55:596:26
612.55:576:27
712.55:566:28
812.65:556:29
912.65:536:29
1012.65:526:30
1112.75:516:31
1212.75:496:32
1312.75:486:32
1412.85:476:33
1512.85:456:34
1612.85:446:35
1712.95:436:35
1812.95:426:36
1912.95:406:37
2013.05:396:38
2113.05:386:38
2213.05:376:39
2313.15:356:40
2413.15:346:41
2513.15:336:42
2613.25:326:42
2713.25:316:43
2813.25:306:44
2913.35:296:45
3013.35:286:45

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.3 kWh/m².

For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 5.57 kWh/m² in May across the year — April's 5.3 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in April

Hazard calendar for Masaki-chō

In seasonPeak

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

Masaki-chō 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 Masaki-chō?

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

5.5
Sightseeing
5th-best month of the year
1.7
Beach & pool
7th-best month of the year

April is a reasonable time to visit Masaki-chō for sightseeing.

What to pack for Masaki-chō in April

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

In April, Masaki-chō sees daytime highs around 18°C and nights near 10°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Masaki-chō in April

The nearest coast averages about 15°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 13 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 12 to Nov 17 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Masaki-chō 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 Masaki-chō 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 Masaki-chō 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 Masaki-chō 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 Masaki-chō?

Masaki-chō sits at 33.8°N, 132.7°E, 7 m above sea level, in Japan. The nearest listed city is Iyo, 4.0 km away.

Topography around Masaki-chō

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

Within 3 km, the terrain around Masaki-chō has only modest variations in elevation — a maximum elevation change of 29 m around an average of 5 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,015 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Masaki-chō is covered by artificial surfaces (44%), cropland (26%) and water (23%) within 3 km, water (40%) and trees (39%) within 16 km, and trees (53%) and water (41%) within 80 km.

3 km
29 m
16 km
1,015 m
80 km
1,895 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Iyo 4.0 km · Haramachi 8.0 km · Matsuyama 8.0 km · Tōon 17 km · Hōjō 22 km · Uchiko 27 km · Shinagawa 32 km · Ōzu 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 Masaki-chō (33.7876°, 132.7112°, elevation 7 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).