Hirakawa weather in April

In April, Hirakawa sees average daytime highs of 12°C and overnight lows near 3°C, with 98 mm of precipitation across 13.7 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 8°C in the first days to 15°C by the end. The sky is clear or mostly clear about 25% 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 42 min by month's end. Set against the rest of the year, April is Hirakawa's 1st-clearest and 4th-windiest month. For the whole year in context, see Hirakawa's year-round climate.

Daytime high
12°
7th warmest
Overnight low
6th coldest
Precipitation
98 mm
13.7 wet days
Daylight
13 h 06 min
5:06 AM – 6:10 PM
Cloud cover
62%
1st clearest
Wind
10 km/h
4th windiest
Solar energy
5.12 kWh/m²
Travel score
2.8
out of 10

Hirakawa is city in Aomori Prefecture, Japan.

Density
89/km²
people per km²
Founded
2006

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 8°C in the first days to 15°C by the end.

A typical April day in Hirakawa reaches about 12°C in the afternoon and slips back to 3°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 17°C. Set against its neighbours, April runs about 7°C warmer than March and about 6°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
180
280
380
490
590
691
7101
8101
9101
10102
11112
12112
13112
14122
15123
16123
17123
18133
19134
20134
21134
22144
23144
24145
25145
26155
27155
28156
29156
30156

How April really feels in Hirakawa

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 15 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
15
wind chill below the day's low

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

Hirakawa 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-0° / -6°8216.921.69.40.0
Feb / -6°8015.517.910.40.0
Mar / -3°10116.813.811.70.2
Apr12° / 9813.73.4132.8
May18° / 10413.10.114.25.2
Jun22° / 14°10913.1014.85.8
Jul25° / 18°16316.4014.65.6
Aug26° / 19°17716.1013.65.6
Sep22° / 14°15414.2012.35.8
Oct16° / 12913.80.110.94.5
Nov / 11216.369.71.5
Dec / -4°1061818.29.20.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in April, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54258
64258
74357
84258
94357
104357
114357
124357
134357
144357
154258
164357
174258
184258
194357
204258
214357
224357
234456
244456
254456
264456
274456
284456
294456
304456

Chance of precipitation in April

Any precipitationSnow

Hirakawa gets around 98 mm of rain and snow over 13.7 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 46% and peaks near 49% on the wettest days, and about 3 days bring snow.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
14926
24925
34923
44922
54920
64819
74818
84817
94716
104715
114714
124613
134612
144611
154611
164610
17469
18469
19468
20457
21457
22457
23456
24446
25445
26445
27444
28444
29443
30443

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 100% 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
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
27991
28991
29991
30991

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 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over April. Sunrise moves from 5:30 AM to 4:45 AM, and sunset from 5:54 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:305:54
212.45:295:55
312.55:275:57
412.55:255:58
512.65:245:59
612.65:226:00
712.75:206:01
812.75:196:02
912.85:176:03
1012.85:156:04
1112.95:146:05
1212.95:126:06
1312.95:106:07
1413.05:096:08
1513.05:076:09
1613.15:066:10
1713.15:046:11
1813.25:026:12
1913.25:016:13
2013.34:596:14
2113.34:586:16
2213.34:566:17
2313.44:556:18
2413.44:536:19
2513.54:526:20
2613.54:516:21
2713.54:496:22
2813.64:486:23
2913.64:466:24
3013.74:456:25

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.12 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 5.42 kWh/m² in May across the year — April's 5.12 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Hirakawa

In seasonPeak

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

Hirakawa 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 Hirakawa?

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

2.8
Sightseeing
7th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Hirakawa.

What to pack for Hirakawa in April

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

In April, Hirakawa sees daytime highs around 12°C and nights near 3°C. Pack a warm layer and rain gear. Worth having: sun protection. About 14 days see rain.

a warm layerrain gearsun protection

Sea temperature near Hirakawa in April

The nearest coast averages about 8°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 41 km away) is warmest in August at about 23°C and coldest in March near 8°C.

It's comfortable for a long swim from Jul 24 to Oct 7 — about 2.5 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar8Bracing
Apr8Bracing
May11Bracing
Jun15Cool
Jul19Cool
Aug23Refreshing
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Hirakawa 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 Hirakawa peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 19UV 8Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun8Very high
Jul5Moderate
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Hirakawa 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 Hirakawa is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1620 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb13Moderate
Mar18Moderate
Apr20Moderate
May18Moderate
Jun13Moderate
Jul12Good
Aug10Good
Sep10Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Hirakawa?

Hirakawa sits at 40.6°N, 140.6°E, 46 m above sea level, in Japan. The nearest listed city is Kuroishi, 7.0 km away.

Topography around Hirakawa

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

Within 3 km, the terrain around Hirakawa has only modest variations in elevation — a maximum elevation change of 131 m around an average of 49 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 976 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,616 m.

The land around Hirakawa is covered by cropland (54%) and trees (23%) within 3 km, trees (65%) and cropland (21%) within 16 km, and trees (59%) and water (31%) within 80 km.

3 km
131 m
16 km
976 m
80 km
1,616 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Kuroishi 7.0 km · Hirosaki 8.0 km · Namioka 14 km · Goshogawara 27 km · Tsugaru 28 km · Aomori 29 km · Shimokizukuri 30 km · Ōdate 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 Hirakawa (40.5873°, 140.5711°, elevation 46 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).