Kōka weather in April

In April, Kōka sees average daytime highs of 18°C and overnight lows near 8°C, with 133 mm of rain across 11.4 wet days and about 12.9 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 30% 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 24 min by month's end. Set against the rest of the year, April is Kōka's 6th-clearest and 4th-windiest month. For the whole year in context, see Kōka's year-round climate.

Daytime high
18°
7th warmest
Overnight low
6th coldest
Rainfall
133 mm
11.4 wet days
Daylight
12 h 54 min
5:29 AM – 6:22 PM
Cloud cover
62%
6th clearest
Wind
10 km/h
4th windiest
Solar energy
5.12 kWh/m²
Travel score
5.4
out of 10

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 Kōka reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 22°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1155
2155
3156
4156
5166
6166
7166
8167
9167
10177
11177
12177
13178
14178
15188
16188
17188
18189
19189
20199
21199
22199
231910
241910
251910
262010
272010
282010
292011
302011

How April really feels in Kōka

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.

Kōka 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 / 627.52.29.91.1
Feb / 688.52.310.71.5
Mar12° / 11612.10.611.73.1
Apr18° / 13311.4012.95.4
May22° / 13°15611.5013.86.4
Jun26° / 18°20314.8014.35.6
Jul30° / 23°21417.8014.14.2
Aug31° / 23°14815013.34.1
Sep27° / 20°20213.9012.25.7
Oct21° / 13°17710.6011.16.5
Nov16° / 847.4010.25.1
Dec10° / 607.119.72.5

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34654
44555
54555
64654
74654
84555
94654
104654
114555
124555
134456
144456
154357
164357
174357
184258
194258
204258
214258
224258
234357
244258
254357
264357
274357
284357
294357
304258

Chance of precipitation in April

Any precipitation

Kōka gets around 133 mm of rain over 11.4 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 38% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
538
638
738
838
938
1039
1139
1239
1339
1439
1539
1639
1739
1839
1939
2039
2139
2238
2338
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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19820
29820
39820
49820
59730
69730
79730
89730
99730
109541
119541
129541
139541
149541
159451
169451
179451
189262
199262
209172
219172
229082
238992
248992
2587103
2686113
2785123
2884133
2982144
3082144

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 18 min at the start of April to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 5:50 AM to 5:12 AM, and sunset from 6:10 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:506:10
212.45:496:11
312.45:476:11
412.45:466:12
512.55:446:13
612.55:436:14
712.65:426:15
812.65:406:16
912.65:396:16
1012.75:376:17
1112.75:366:18
1212.75:356:19
1312.85:336:20
1412.85:326:20
1512.85:316:21
1612.95:296:22
1712.95:286:23
1813.05:276:24
1913.05:256:24
2013.05:246:25
2113.15:236:26
2213.15:216:27
2313.15:206:28
2413.25:196:29
2513.25:186:29
2613.25:176:30
2713.35:156:31
2813.35:146:32
2913.35:136:33
3013.45:126:33

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 2.32 kWh/m² to a high of 5.48 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
14.8Bright
24.8Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Kōka

In seasonPeak

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

Kōka 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 Kōka?

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

5.4
Sightseeing
5th-best month of the year
1.7
Beach & pool
7th-best month of the year

April is a reasonable time to visit Kōka for sightseeing.

What to pack for Kōka in April

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

In April, Kōka sees daytime highs around 18°C and nights near 8°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Kōka 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 44 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul26Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Kōka 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 Kōka peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 23UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Kōka 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 Kōka is worst in April — around 26 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1125 µg/m³Aug 1817 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr26Moderate
May25Moderate
Jun21Moderate
Jul17Moderate
Aug17Moderate
Sep17Moderate
Oct18Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Kōka?

Kōka sits at 35.0°N, 136.2°E, 170 m above sea level, in Japan. The nearest listed city is Minakuchichō-matoba, 2.0 km away.

Topography around Kōka

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

Within 3 km, the terrain around Kōka has only modest variations in elevation — a maximum elevation change of 185 m around an average of 177 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 782 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,422 m.

The land around Kōka is covered by trees (39%), artificial surfaces (34%) and cropland (22%) within 3 km, trees (61%) within 16 km, and trees (58%) within 80 km.

3 km
185 m
16 km
782 m
80 km
1,422 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Minakuchichō-matoba 2.0 km · Konan 6.0 km · Hino 9.0 km · Rittō 15 km · Youkaichi 16 km · Ōmihachiman 17 km · Kusatsu 18 km · Yasu 18 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 Kōka (34.9802°, 136.1575°, elevation 170 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).