Ōmura weather in April

In April, Ōmura sees average daytime highs of 18°C and overnight lows near 13°C, with 150 mm of rain across 10.8 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 16°C in the first days to 19°C by the end. The sky is clear or mostly clear about 33% 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 Ōmura's 5th-clearest and 6th-windiest month. For the whole year in context, see Ōmura's year-round climate.

Daytime high
18°
7th warmest
Overnight low
13°
6th coldest
Rainfall
150 mm
10.8 wet days
Daylight
12 h 48 min
5:56 AM – 6:45 PM
Cloud cover
60%
5th clearest
Wind
12 km/h
6th windiest
Solar energy
5 kWh/m²
Travel score
5.5
out of 10

Ōmura is city in Nagasaki Prefecture, Japan.

Density
753/km²
people per km²
Founded
1942

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 16°C in the first days to 19°C by the end.

A typical April day in Ōmura reaches about 18°C in the afternoon and slips back to 13°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 20°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)
11511
21611
31611
41611
51611
61612
71612
81612
91712
101712
111712
121712
131713
141713
151713
161813
171813
181813
191813
201814
211814
221814
231914
241914
251914
261914
271915
281915
291915
302015

How April really feels in Ōmura

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.

Ōmura 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 / 657.90.510.12.1
Feb10° / 838.40.310.82.4
Mar13° / 13111011.73.7
Apr18° / 13°15010.8012.85.5
May22° / 17°17310.6013.76.4
Jun25° / 21°38116014.15.6
Jul28° / 25°309170144.9
Aug30° / 26°17915013.24.7
Sep27° / 23°18811.5012.26.3
Oct22° / 18°1107011.27.3
Nov17° / 13°947.7010.35.8
Dec12° / 767.709.93.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34555
44555
54555
64555
74555
84456
94456
104456
114357
124357
134357
144357
154357
164357
174456
184555
194555
204456
214555
224555
234654
244654
254654
264654
274654
284555
294555
304555

Chance of precipitation in April

Any precipitation

Ōmura gets around 150 mm of rain over 10.8 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 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
336
436
536
635
735
835
935
1035
1135
1236
1336
1436
1537
1637
1737
1837
1937
2037
2137
2237
2337
2437
2537
2636
2736
2836
2936
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 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
189920
2881020
3871120
4861220
5851320
6831430
7821530
8811630
9801730
10791830
11771940
12762040
13752140
14752140
15732250
16722350
17702460
18702460
19692560
20662671
21652771
22632881
23603091
245831101
255632111
265532121
275233132
285034142
294834162
304635173

Wind in April

Winds average 12 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:16 AM to 5:40 AM, and sunset from 6:34 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:166:34
212.36:146:35
312.46:136:35
412.46:126:36
512.46:106:37
612.56:096:38
712.56:086:38
812.56:066:39
912.66:056:40
1012.66:046:40
1112.66:026:41
1212.76:016:42
1312.76:006:43
1412.75:596:43
1512.85:576:44
1612.85:566:45
1712.85:556:46
1812.95:546:46
1912.95:526:47
2012.95:516:48
2113.05:506:48
2213.05:496:49
2313.05:486:50
2413.15:466:51
2513.15:456:51
2613.15:446:52
2713.25:436:53
2813.25:426:54
2913.25:416:54
3013.35:406:55

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5 kWh/m².

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 5.31 kWh/m² in May across the year — April's 5 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in April

Hazard calendar for Ōmura

In seasonPeak

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

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

Ōmura's rainy season runs May–September, 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 April a good time to visit Ōmura?

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

5.5
Sightseeing
6th-best month of the year
1.6
Beach & pool
7th-best month of the year

April is a reasonable time to visit Ōmura for sightseeing.

What to pack for Ōmura in April

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

In April, Ōmura sees daytime highs around 18°C and nights near 13°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Ōmura in April

The nearest coast averages about 17°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 31 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 27 to Nov 29 — about 6.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec19Cool

UV index in Ōmura in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ōmura peaks around July 16 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 highVery highModerateJul 16UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun9Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Ōmura 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 Ōmura is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodModerateApr 1324 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May21Moderate
Jun17Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct11Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Ōmura?

Ōmura sits at 32.9°N, 130.0°E, 17 m above sea level, in Japan. The nearest listed city is Isahaya, 12 km away.

Topography around Ōmura

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

Within 3 km, the terrain around Ōmura has only modest variations in elevation — a maximum elevation change of 229 m around an average of 33 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,058 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,406 m.

The land around Ōmura is covered by artificial surfaces (48%) and water (24%) within 3 km, trees (52%) and water (32%) within 16 km, and water (55%) and trees (32%) within 80 km.

3 km
229 m
16 km
1,058 m
80 km
1,406 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Isahaya 12 km · Obita 13 km · Togitsu 14 km · Nagasaki 20 km · Ureshinomachi-shimojuku 22 km · Kashima 24 km · Saikai 26 km · Arita 30 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 Ōmura (32.9214°, 129.9539°, elevation 17 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).