Kiryū weather in April

In April, Kiryū sees average daytime highs of 15°C and overnight lows near 6°C, with 114 mm of precipitation across 12.7 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 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 32% 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 Kiryū's 6th-clearest and 5th-windiest month. For the whole year in context, see Kiryū's year-round climate.

Daytime high
15°
7th warmest
Overnight low
6th coldest
Precipitation
114 mm
12.7 wet days
Daylight
12 h 54 min
5:15 AM – 6:11 PM
Cloud cover
60%
6th clearest
Wind
7 km/h
5th windiest
Solar energy
5.08 kWh/m²
Travel score
4.4
out of 10

Kiryū is city in Gunma Prefecture, Japan.

Density
397/km²
people per km²
Founded
1889

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 13°C in the first days to 18°C by the end.

A typical April day in Kiryū reaches about 15°C in the afternoon and slips back to 6°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 20°C. Set against its neighbours, April runs about 6°C warmer than March and about 5°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1123
2133
3134
4134
5134
6134
7144
8145
9145
10145
11155
12155
13156
14156
15156
16166
17166
18167
19167
20167
21167
22177
23178
24178
25178
26178
27188
28188
29189
30189

How April really feels in Kiryū

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.

Kiryū 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 / -2°517.25.59.80.1
Feb / -2°518.35.910.60.4
Mar10° / 9912.45.411.72.0
Apr15° / 11412.71.312.94.4
May20° / 11°13614.3013.95.6
Jun23° / 16°17318.4014.45.1
Jul27° / 20°21721.3014.24.7
Aug28° / 21°17420.2013.44.7
Sep24° / 17°20417.2012.25.4
Oct18° / 11°16813.4011.15.4
Nov13° / 667.80.310.13.9
Dec / 4573.39.61.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55050
64951
74951
84951
94951
104852
114852
124852
134753
144753
154654
164654
174654
184654
194654
204753
214654
224654
234654
244654
254654
264654
274654
284654
294654
304654

Chance of precipitation in April

Any precipitationSnow

Kiryū gets around 114 mm of rain and snow over 12.7 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 43% and peaks near 44% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
14211
24210
34210
4429
5429
6428
7428
8427
9427
10436
11436
12436
13435
14445
15445
16445
17444
18444
19444
20443
21443
22433
23432
24432
25432
26432
27421
28421
29421
30421

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
810000
910000
1010000
1110000
129910
139910
149910
159910
169910
179910
189910
199811
209811
219811
229811
239721
249721
259721
269631
279631
289541
299541
309541

Wind in April

Winds average 7 km/h in April.

Across April, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:37 AM to 4:57 AM, and sunset from 5:58 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:375:58
212.45:355:59
312.45:345:59
412.55:326:00
512.55:316:01
612.55:296:02
712.65:286:03
812.65:276:04
912.75:256:05
1012.75:246:05
1112.75:226:06
1212.85:216:07
1312.85:196:08
1412.95:186:09
1512.95:166:10
1612.95:156:11
1713.05:146:12
1813.05:126:12
1913.05:116:13
2013.15:106:14
2113.15:086:15
2213.15:076:16
2313.25:066:17
2413.25:046:18
2513.35:036:19
2613.35:026:19
2713.35:016:20
2813.44:596:21
2913.44:586:22
3013.44:576:23

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.08 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.29 kWh/m² in May across the year — April's 5.08 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
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Kiryū

In seasonPeak

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

Kiryū's rainy season runs March–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Kiryū?

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

4.4
Sightseeing
7th-best month of the year
0.6
Beach & pool
7th-best month of the year

April is a reasonable time to visit Kiryū for sightseeing.

What to pack for Kiryū in April

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

In April, Kiryū sees daytime highs around 15°C and nights near 6°C. Worth packing: a warm layer, rain gear and sun protection. About 13 days see rain.

a warm layerrain gearsun protection

UV index in Kiryū 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 Kiryū peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 16UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Kiryū 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 Kiryū 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 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Kiryū?

Kiryū sits at 36.4°N, 139.3°E, 108 m above sea level, in Japan. The nearest listed city is Ōmamachō-ōmama, 6.0 km away.

Topography around Kiryū

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

Within 3 km, the terrain around Kiryū has significant variations in elevation — a maximum elevation change of 306 m around an average of 134 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,075 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,552 m.

The land around Kiryū is covered by artificial surfaces (57%) and trees (35%) within 3 km, trees (50%) and artificial surfaces (31%) within 16 km, and trees (65%) within 80 km.

3 km
306 m
16 km
1,075 m
80 km
2,552 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Ōmamachō-ōmama 6.0 km · Midori 7.0 km · Ōta 12 km · Ashikaga 13 km · Isesaki 15 km · Sakai-nakajima 17 km · Kamikoizumi 17 km · Menuma 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 Kiryū (36.4°, 139.3333°, elevation 108 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. 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).