Suwa in Spring

In spring (March, April and May), Suwa sees average daytime highs around 13°C and overnight lows near 3°C, with 402 mm of precipitation over about 38 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.

Over the season highs climb from about 5°C in early March to 20°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 Suwa's 3rd-best season to visit on our travel score. For the whole year in context, see Suwa's year-round climate.

Avg daytime high: 13°C; 3rd-warmest season
Avg overnight low: 3°C
Precipitation: 402 mm; 38 wet days
Avg wind: 7 km/h
Travel score: 3.4; 3rd-best season
Months: Mar · Apr · May

← Winter Suwa year-round climate Summer →

Spring Summer Fall Winter

Temperature in Suwa in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 5°C in early March to 20°C by late May.

A typical spring day in Suwa reaches about 13°C and drops to 3°C overnight. The warmest of the three months is May, the coolest March.

How spring really feels in Suwa

Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 42 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.

Suwa 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	2° / -8°	85	11.5	12.4	9.8	0.0
Feb	3° / -7°	86	10.1	9.5	10.6	0.0
Mar	7° / -3°	142	13.3	8.9	11.7	0.9
Apr	14° / 3°	127	12.4	1.9	12.9	3.7
May	19° / 9°	133	12.1	0.1	13.9	5.7
Jun	22° / 14°	178	15.5	0	14.4	5.4
Jul	26° / 18°	198	17	0	14.2	5.5
Aug	27° / 18°	123	13.4	0	13.4	5.9
Sep	23° / 15°	159	12.8	0	12.2	6.1
Oct	17° / 8°	170	12.1	0.1	11.1	5.2
Nov	11° / 2°	97	10.4	1.7	10.1	2.8
Dec	5° / -4°	84	12	9.4	9.6	0.2

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

Suwa gets around 402 mm of rain and snow over 38 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 7 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 06 min in early March to 14 h 12 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 5.3 kWh/m².

Planning a trip in spring

Hazard calendar for Suwa

In seasonPeak

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

Suwa 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 spring a good time to visit Suwa?

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.

3.4

Sightseeing

3rd-best month of the year

0.9

Beach & pool

3rd-best month of the year

spring is a weaker month for outdoor sightseeing in Suwa.

What to pack for Suwa in Spring

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

In spring, Suwa sees daytime highs around 13°C and nights near 3°C. Pack a warm layer. Worth having: a heavy coat, rain gear and sun protection. About 38 days see rain.

a warm layera heavy coatrain gearsun protection

UV index in Suwa in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages 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 Suwa peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

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)	3	5	6	7	9	10	11	10	9	6	4	2
Level	Moderate	Moderate	High	Very high	Very high	Extreme	Extreme	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	6	High
Apr	7	Very high
May	9	Very high
Jun	10	Extreme
Jul	11	Extreme
Aug	10	Very high
Sep	9	Very high
Oct	6	High
Nov	4	Moderate
Dec	2	Moderate

Air quality in Suwa 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 Suwa is worst in April — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 8 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)	9	11	17	18	17	16	13	12	10	10	9	8
Level	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	9	Good
Feb	11	Good
Mar	17	Moderate
Apr	18	Moderate
May	17	Moderate
Jun	16	Moderate
Jul	13	Moderate
Aug	12	Good
Sep	10	Good
Oct	10	Good
Nov	9	Good
Dec	8	Good

Location & terrain

Where is Suwa?

Suwa sits at 36.0°N, 138.1°E, 762 m above sea level, in Japan. The nearest listed city is Shimosuwa, 5.0 km away.

Topography around Suwa

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

Within 3 km, the terrain around Suwa has significant variations in elevation — a maximum elevation change of 507 m around an average of 828 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,248 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,057 m.

The land around Suwa is covered by artificial surfaces (34%), trees (27%) and water (22%) within 3 km, trees (76%) within 16 km, and trees (87%) within 80 km.

3 km

507 m

artificial surfaces 34%

16 km

1,248 m

trees 76%

80 km

3,057 m

trees 87%

treesgrasslandcroplandartificial surfaceswater

← Winter Suwa year-round climate Summer →

Spring weather nearby: Shimosuwa 5.0 km · Chino 6.0 km · Okaya 6.0 km · Tatsuno 12 km · Shiojiri 15 km · Kinoshita 19 km · Minamiminowa 22 km · Matsumoto 25 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 Suwa (36.038°, 138.1131°, elevation 762 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.