Kuroiso in Spring

In spring (March, April and May), Kuroiso sees average daytime highs around 15°C and overnight lows near 5°C, with 389 mm of precipitation over about 40 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.

Over the season highs climb from about 7°C in early March to 21°C by late May. The sky is clear or mostly clear about 28% of the time across spring, and the air most often feels dry.

Spring is Kuroiso's 3rd-best season to visit on our travel score. For the whole year in context, see Kuroiso's year-round climate.

Avg daytime high: 15°C; 3rd-warmest season
Avg overnight low: 5°C
Precipitation: 389 mm; 40 wet days
Avg wind: 8 km/h
Travel score: 3.8; 3rd-best season
Months: Mar · Apr · May

← Winter Kuroiso year-round climate Summer →

Spring Summer Fall Winter

Temperature in Kuroiso in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 7°C in early March to 21°C by late May.

A typical spring day in Kuroiso reaches about 15°C and drops to 5°C overnight. The warmest of the three months is May, the coolest March.

How spring really feels in Kuroiso

Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 33 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Kuroiso weather by month

How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	5° / -3°	61	9.3	8	9.8	0.0
Feb	5° / -2°	56	8.8	6.2	10.6	0.2
Mar	9° / 0°	111	13.3	5.1	11.7	1.8
Apr	15° / 5°	130	13.1	1.1	12.9	4.1
May	20° / 10°	149	13.9	0	13.9	5.6
Jun	23° / 15°	176	16.8	0	14.5	5.3
Jul	26° / 19°	240	21.1	0	14.3	4.8
Aug	27° / 20°	190	18.4	0	13.4	5.0
Sep	24° / 17°	227	16.4	0	12.3	5.5
Oct	18° / 10°	185	14	0	11	5.2
Nov	13° / 4°	88	9.4	0.3	10	3.5
Dec	7° / -0°	60	9.6	4.1	9.5	1.1

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time across spring.

Chance of precipitation in Spring

Any precipitationSnow

Kuroiso gets around 389 mm of rain and snow over 40 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

Wind in Spring

Winds average 8 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 06 min in early March to 14 h 18 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 4.8 kWh/m².

Planning a trip in spring

Hazard calendar for Kuroiso

In seasonPeak

In spring, Kuroiso overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

Kuroiso'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 spring a good time to visit Kuroiso?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.8

Sightseeing

3rd-best month of the year

1.1

Beach & pool

3rd-best month of the year

spring is a weaker month for outdoor sightseeing in Kuroiso.

What to pack for Kuroiso in Spring

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

In spring, Kuroiso sees daytime highs around 15°C and nights near 5°C. Pack a warm layer. Worth having: rain gear and sun protection. About 40 days see rain.

a warm layerrain gearsun protection

UV index in Kuroiso in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages 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 Kuroiso peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	5	7	8	9	10	9	9	6	3	2
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	Very high	High	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	4	Moderate
Mar	5	Moderate
Apr	7	High
May	8	Very high
Jun	9	Very high
Jul	10	Very high
Aug	9	Very high
Sep	9	Very high
Oct	6	High
Nov	3	Moderate
Dec	2	Low

Air quality in Kuroiso in Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.

Air quality in Kuroiso 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	10	13	19	21	20	16	14	13	11	11	10	9
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	13	Moderate
Mar	19	Moderate
Apr	21	Moderate
May	20	Moderate
Jun	16	Moderate
Jul	14	Moderate
Aug	13	Moderate
Sep	11	Good
Oct	11	Good
Nov	10	Good
Dec	9	Good

Location & terrain

Where is Kuroiso?

Kuroiso sits at 37.0°N, 140.1°E, 301 m above sea level, in Japan. The nearest listed city is Nasushiobara, 2.0 km away.

Topography around Kuroiso

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

Within 3 km, the terrain around Kuroiso has only modest variations in elevation — a maximum elevation change of 113 m around an average of 299 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,299 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,551 m.

The land around Kuroiso is covered by artificial surfaces (38%), trees (30%) and cropland (30%) within 3 km, trees (61%) and cropland (26%) within 16 km, and trees (75%) within 80 km.

3 km

113 m

artificial surfaces 38%

16 km

1,299 m

trees 61%

80 km

2,551 m

trees 75%

treesgrasslandcroplandartificial surfaceswater

← Winter Kuroiso year-round climate Summer →

Spring weather nearby: Nasushiobara 2.0 km · Nasu 9.0 km · Ōtawara 11 km · Yaita 21 km · Kumakura 23 km · Ogawa 25 km · Shirakawa 25 km · Sakura 28 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

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 Kuroiso (36.9667°, 140.05°, elevation 301 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.