Kasama weather in April

In April, Kasama sees average daytime highs of 17°C and overnight lows near 8°C, with 117 mm of precipitation across 12.1 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 28% 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 Kasama's 6th-clearest and 2nd-windiest month. For the whole year in context, see Kasama's year-round climate.

Daytime high
17°
7th warmest
Overnight low
6th coldest
Precipitation
117 mm
12.1 wet days
Daylight
12 h 54 min
5:11 AM – 6:07 PM
Cloud cover
62%
6th clearest
Wind
9 km/h
2nd windiest
Solar energy
4.95 kWh/m²
Travel score
5.2
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 Kasama reaches about 17°C in the afternoon and slips back to 8°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 22°C. Set against its neighbours, April runs about 5°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1155
2156
3156
4156
5166
6166
7167
8167
9167
10167
11177
12177
13178
14178
15178
16188
17188
18189
19189
20189
21189
22199
231910
241910
251910
261910
271910
282010
292011
302011

How April really feels in Kasama

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.

Kasama 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 / 566.71.69.81.6
Feb / 587.32.110.61.9
Mar12° / 10712.11.411.73.2
Apr17° / 11712.10.212.95.2
May22° / 13°14212.6013.96.1
Jun25° / 18°15215.3014.45.6
Jul28° / 22°18417.3014.24.7
Aug30° / 23°13715013.44.5
Sep26° / 19°17514.8012.25.7
Oct21° / 14°17912.4011.16.0
Nov15° / 888.5010.15.0
Dec10° / 577.30.39.62.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24852
34951
44852
54753
64654
74753
84753
94654
104654
114456
124456
134357
144258
154258
164258
174357
184258
194258
204258
214357
224357
234456
244456
254456
264456
274456
284456
294456
304456

Chance of precipitation in April

Any precipitationSnow

Kasama gets around 117 mm of rain and snow over 12.1 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 41% and peaks near 41% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1412
2412
3412
4412
5412
6411
7411
8411
9411
10411
11411
12411
13410
14410
15410
16410
17410
18410
19400
20400
21400
22400
23400
24400
25400
26400
27400
28400
29390
30390

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 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69910
79820
89820
99820
109820
119730
129730
139730
149640
159640
169541
179451
189451
199361
209361
219271
229181
239091
2489101
2587112
2686122
2785132
2884142
2983152
3081163

Wind in April

Winds average 9 km/h in April.

Across April, daily wind ranges from about 9 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
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:33 AM to 4:53 AM, and sunset from 5:54 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:335:54
212.45:325:55
312.45:305:56
412.55:295:57
512.55:275:57
612.55:265:58
712.65:245:59
812.65:236:00
912.75:216:01
1012.75:206:02
1112.75:186:03
1212.85:176:03
1312.85:166:04
1412.95:146:05
1512.95:136:06
1612.95:116:07
1713.05:106:08
1813.05:096:09
1913.05:076:10
2013.15:066:10
2113.15:056:11
2213.15:036:12
2313.25:026:13
2413.25:016:14
2513.34:596:15
2613.34:586:16
2713.34:576:17
2813.44:566:17
2913.44:556:18
3013.44:536:19

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 2.37 kWh/m² to a high of 5.23 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
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.1Bright
255.1Bright
265.1Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in April

Hazard calendar for Kasama

In seasonPeak

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

Kasama 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 Kasama?

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

5.2
Sightseeing
5th-best month of the year
1.5
Beach & pool
7th-best month of the year

April is a reasonable time to visit Kasama for sightseeing.

What to pack for Kasama in April

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

In April, Kasama sees daytime highs around 17°C and nights near 8°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Kasama 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 32 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Kasama 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 Kasama peaks around July 24 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 24UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Kasama 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 Kasama is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Kasama?

Kasama sits at 36.4°N, 140.3°E, 177 m above sea level, in Japan. The nearest listed city is Tomobe, 5.0 km away.

Topography around Kasama

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

Within 3 km, the terrain around Kasama has only modest variations in elevation — a maximum elevation change of 167 m around an average of 71 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 698 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,298 m.

The land around Kasama is covered by trees (58%) within 3 km, trees (66%) within 16 km, and trees (43%) and cropland (21%) within 80 km.

3 km
167 m
16 km
698 m
80 km
2,298 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Tomobe 5.0 km · Ishitsuka 15 km · Iwase 15 km · Mito 17 km · Okunoya 17 km · Omitama 18 km · Mashiko 18 km · Makabe 20 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 Kasama (36.3833°, 140.2667°, elevation 177 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).