Ōmagari weather in April

In April, Ōmagari sees average daytime highs of 13°C and overnight lows near 4°C, with 112 mm of precipitation across 15.2 wet days and about 13 hours of daylight. It is the 7th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 16°C by the end. The sky is clear or mostly clear about 24% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 36 min by month's end. Set against the rest of the year, April is Ōmagari's 1st-clearest and 5th-windiest month. For the whole year in context, see Ōmagari's year-round climate.

Daytime high
13°
7th warmest
Overnight low
6th coldest
Precipitation
112 mm
15.2 wet days
Daylight
13 hours
5:07 AM – 6:09 PM
Cloud cover
64%
1st clearest
Wind
10 km/h
5th windiest
Solar energy
4.95 kWh/m²
Travel score
3.3
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 10°C in the first days to 16°C by the end.

A typical April day in Ōmagari reaches about 13°C in the afternoon and slips back to 4°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 19°C. Set against its neighbours, April runs about 7°C warmer than March and about 5°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1101
2101
3102
4112
5112
6112
7112
8123
9123
10123
11123
12133
13134
14134
15134
16144
17144
18145
19145
20155
21155
22155
23156
24156
25166
26166
27166
28167
29167
30177

How April really feels in Ōmagari

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 9 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
9
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Ōmagari weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°11021.121.69.50.0
Feb / -5°90171710.40.0
Mar / -1°11517.912.111.70.7
Apr13° / 11215.22.3133.3
May19° / 10°12113.5014.15.5
Jun23° / 15°13112.8014.76.0
Jul26° / 19°20617014.55.4
Aug27° / 20°17316.2013.55.4
Sep24° / 16°15214.2012.35.8
Oct17° / 14114.10115.0
Nov11° / 12917.63.59.82.1
Dec / -2°1302115.99.30.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in April, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23961
33961
44159
54159
64159
74159
84258
94258
104159
114159
124258
134159
144159
154060
164060
174060
183961
194060
204060
214060
224060
234159
244258
254258
264159
274258
284258
294258
304258

Chance of precipitation in April

Any precipitationSnow

Ōmagari gets around 112 mm of rain and snow over 15.2 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 51% and peaks near 56% on the wettest days, and about 2 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
15622
25521
35519
45518
55517
65416
75415
85313
95312
105211
115210
12519
13519
14518
15507
16506
17506
18505
19494
20494
21493
22483
23483
24482
25482
26482
27481
28471
29471
30471

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25982
26982
27982
28973
29973
30973

Wind in April

Winds average 10 km/h in April.

Across April, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over April. Sunrise moves from 5:31 AM to 4:47 AM, and sunset from 5:54 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:315:54
212.45:295:55
312.55:285:56
412.55:265:57
512.65:255:58
612.65:235:59
712.65:216:00
812.75:206:01
912.75:186:02
1012.85:176:03
1112.85:156:04
1212.95:136:05
1312.95:126:06
1413.05:106:07
1513.05:096:08
1613.05:076:09
1713.15:066:10
1813.15:046:11
1913.25:036:12
2013.25:016:13
2113.25:006:14
2213.34:586:15
2313.34:576:16
2413.44:566:17
2513.44:546:18
2613.44:536:19
2713.54:516:20
2813.54:506:21
2913.64:496:22
3013.64:476:23

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.95 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 5.31 kWh/m² in May across the year — April's 4.95 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in April

Hazard calendar for Ōmagari

In seasonPeak

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

Ōmagari 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 Ōmagari?

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

3.3
Sightseeing
7th-best month of the year
0.2
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Ōmagari.

What to pack for Ōmagari in April

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

In April, Ōmagari sees daytime highs around 13°C and nights near 4°C. Pack rain gear. Worth having: a warm layer and sun protection. About 15 days see rain.

rain geara warm layersun protection

Sea temperature near Ōmagari in April

The nearest coast averages about 10°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 53 km away) is warmest in August at about 26°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 27 to Oct 24 — about 3.9 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun19Cool
Jul22Refreshing
Aug26Warm
Sep25Warm
Oct21Refreshing
Nov18Cool
Dec14Bracing

UV index in Ōmagari in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ōmagari peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Jan 11UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun8Very high
Jul6High
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Ōmagari 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 Ōmagari is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun15Moderate
Jul13Moderate
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Ōmagari?

Ōmagari sits at 39.5°N, 140.5°E, 28 m above sea level, in Japan. The nearest listed city is Daisen, 1.0 km away.

Topography around Ōmagari

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

Within 3 km, the terrain around Ōmagari has only modest variations in elevation — a maximum elevation change of 51 m around an average of 25 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 869 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,211 m.

The land around Ōmagari is covered by cropland (53%) and artificial surfaces (30%) within 3 km, trees (51%) and cropland (38%) within 16 km, and trees (69%) within 80 km.

3 km
51 m
16 km
869 m
80 km
2,211 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Daisen 1.0 km · Rokugō 7.0 km · Yokote 16 km · Yuzawa 32 km · Semboku 37 km · Yurihonjō 37 km · Akita 43 km · Shizukuishi 51 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 Ōmagari (39.45°, 140.4833°, elevation 28 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).