Sunagawa weather in April

In April, Sunagawa sees average daytime highs of 10°C and overnight lows near 1°C, with 73 mm of precipitation across 13.4 wet days and about 13.2 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 6°C in the first days to 13°C by the end. The sky is clear or mostly clear about 26% 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 48 min by month's end. Set against the rest of the year, April is Sunagawa's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Sunagawa's year-round climate.

Daytime high
10°
7th warmest
Overnight low
6th coldest
Precipitation
73 mm
13.4 wet days
Daylight
13 h 12 min
4:57 AM – 6:08 PM
Cloud cover
62%
2nd clearest
Wind
10 km/h
3rd windiest
Solar energy
4.99 kWh/m²
Travel score
1.9
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 6°C in the first days to 13°C by the end.

A typical April day in Sunagawa reaches about 10°C in the afternoon and slips back to 1°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 15°C. Set against its neighbours, April runs about 8°C warmer than March and about 6°C cooler than May.

-10°10°20°151015202530
Avg high (°C)Avg low (°C)
16-2
26-2
36-2
47-2
57-2
67-1
77-1
88-1
98-1
1080
1180
1290
1390
1490
15101
16101
17101
18101
19111
20112
21112
22112
23122
24123
25123
26123
27133
28134
29134
30134

How April really feels in Sunagawa

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 25 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
25
wind chill below the day's low

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

Sunagawa weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-4° / -11°6115.820.59.10.0
Feb-3° / -10°5213.417.310.20.0
Mar / -6°6814.314.911.60.0
Apr10° / 7313.45.413.21.9
May16° / 8912.40.314.54.6
Jun20° / 12°7911.1015.25.9
Jul23° / 16°13213.5014.96.1
Aug24° / 17°17014.4013.86.0
Sep20° / 12°14014.5012.35.5
Oct14° / 11115.40.910.83.5
Nov / -1°10518.2129.50.6
Dec-1° / -8°8317.720.88.80.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24654
34654
44555
54555
64555
74555
84555
94456
104456
114456
124357
134357
144357
154456
164456
174456
184456
194456
204456
214456
224555
234555
244357
254357
264357
274357
284258
294159
304159

Chance of precipitation in April

Any precipitationSnow

Sunagawa gets around 73 mm of rain and snow over 13.4 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 44% and peaks near 45% on the wettest days, and about 5 days bring snow.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
14432
24431
34429
44428
54427
64426
74425
84424
94423
104522
114522
124521
134520
144520
154519
164518
174517
184517
194516
204515
214514
224513
234412
244411
254410
26449
27448
28447
29446
30446

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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

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 11 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
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 5:24 AM to 4:34 AM, and sunset from 5:50 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:245:50
212.55:225:52
312.55:205:53
412.65:185:54
512.65:165:55
612.75:155:56
712.75:135:58
812.85:115:59
912.85:096:00
1012.95:076:01
1112.95:066:02
1213.05:046:04
1313.05:026:05
1413.15:006:06
1513.14:596:07
1613.24:576:08
1713.24:556:10
1813.34:536:11
1913.34:526:12
2013.44:506:13
2113.44:486:14
2213.54:476:16
2313.54:456:17
2413.64:436:18
2513.64:426:19
2613.74:406:20
2713.74:396:22
2813.84:376:23
2913.84:366:24
3013.84:346:25

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.99 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 5.3 kWh/m² in May across the year — April's 4.99 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.2Bright
305.2Bright
Planning a trip in April

Hazard calendar for Sunagawa

In seasonPeak

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

Sunagawa 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 Sunagawa?

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

1.9
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 Sunagawa.

What to pack for Sunagawa in April

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

In April, Sunagawa sees daytime highs around 10°C and nights near 1°C. Pack a warm layer. Worth having: rain gear and sun protection. About 13 days see rain.

a warm layerrain gearsun protection

Sea temperature near Sunagawa in April

The nearest coast averages about 7°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 45 km away) is warmest in August at about 22°C and coldest in February near 5°C.

It's comfortable for a long swim from Jul 31 to Sep 22 — about 1.8 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb5Bracing
Mar5Bracing
Apr7Bracing
May10Bracing
Jun14Bracing
Jul19Cool
Aug22Refreshing
Sep21Refreshing
Oct17Cool
Nov13Bracing
Dec9Bracing

UV index in Sunagawa in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sunagawa peaks around August 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 17UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7Very high
Jun7High
Jul6High
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Sunagawa 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 Sunagawa 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1220 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb15Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun14Moderate
Jul13Moderate
Aug11Good
Sep11Good
Oct12Good
Nov10Good
Dec9Good
Location & terrain

Where is Sunagawa?

Sunagawa sits at 43.5°N, 141.9°E, 33 m above sea level, in Japan. The nearest listed city is Takikawa, 7.0 km away.

Topography around Sunagawa

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

Within 3 km, the terrain around Sunagawa has only modest variations in elevation — a maximum elevation change of 198 m around an average of 37 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,086 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,253 m.

The land around Sunagawa is covered by cropland (43%) and trees (29%) within 3 km, trees (64%) and cropland (26%) within 16 km, and trees (62%) within 80 km.

3 km
198 m
16 km
1,086 m
80 km
2,253 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Takikawa 7.0 km · Bibai 18 km · Ashibetsu 23 km · Fukagawa 27 km · Iwamizawa 34 km · Furano 41 km · Shimo-furano 41 km · Tōbetsu 43 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 Sunagawa (43.4864°, 141.9056°, elevation 33 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).