Shūnan in Spring
In spring (March, April and May), Shūnan sees average daytime highs around 16°C and overnight lows near 11°C, with 441 mm of precipitation over about 31 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 11°C in early March to 22°C by late May. The sky is clear or mostly clear about 33% of the time across spring, and the air most often feels dry.
Spring is Shūnan's 3rd-best season to visit on our travel score. For the whole year in context, see Shūnan's year-round climate.
- Avg daytime high
- 16°C
- 3rd-warmest season
- Avg overnight low
- 11°C
- Precipitation
- 441 mm
- 31 wet days
- Avg wind
- 14 km/h
- Travel score
- 4.9
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Shūnan in Spring
Over the season highs climb from about 11°C in early March to 22°C by late May.
A typical spring day in Shūnan reaches about 16°C and drops to 11°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Shūnan
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
spring sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Shūnan 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 | 9° / 4° | 62 | 9.3 | 1.3 | 10 | 1.7 |
| Feb | 9° / 4° | 76 | 9.5 | 1.1 | 10.7 | 2.0 |
| Mar | 12° / 7° | 124 | 10.7 | 0.2 | 11.7 | 3.3 |
| Apr | 17° / 11° | 148 | 10.2 | 0 | 12.8 | 5.2 |
| May | 21° / 15° | 169 | 10.1 | 0 | 13.7 | 6.3 |
| Jun | 24° / 20° | 264 | 14.3 | 0 | 14.2 | 5.9 |
| Jul | 27° / 24° | 259 | 14.7 | 0 | 14 | 5.5 |
| Aug | 29° / 25° | 147 | 12.7 | 0 | 13.3 | 5.2 |
| Sep | 26° / 22° | 169 | 11.5 | 0 | 12.2 | 6.4 |
| Oct | 22° / 16° | 113 | 7.7 | 0 | 11.1 | 7.1 |
| Nov | 16° / 11° | 78 | 8.1 | 0 | 10.2 | 5.5 |
| Dec | 11° / 7° | 69 | 9.8 | 0.3 | 9.8 | 2.9 |
Cloud cover in Spring
The sky is clear or mostly clear about 33% of the time across spring.
Chance of precipitation in Spring
Shūnan gets around 441 mm of rain and snow over 31 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
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 14 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 12 min in early March to 14 h 06 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.0 kWh/m².
Hazard calendar for Shūnan
In spring, Shūnan overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Shūnan sits in the Pacific typhoon belt; the season peaks July–October.
Shūnan's rainy season runs March–September, when most of the year's rain falls.
Is spring a good time to visit Shūnan?
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.
spring is a reasonable time to visit Shūnan for sightseeing.
What to pack for Shūnan in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Shūnan sees daytime highs around 16°C and nights near 11°C. Worth packing: a warm layer, rain gear and sun protection. About 31 days see rain.
Sea temperature near Shūnan in Spring
The nearest coast averages about 15°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 23 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 Jun 9 to Nov 16 — about 5.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 13 | 15 | 17 | 21 | 25 | 27 | 25 | 23 | 20 | 17 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Bracing |
| May | 17 | Cool |
| Jun | 21 | Refreshing |
| Jul | 25 | Warm |
| Aug | 27 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 20 | Refreshing |
| Dec | 17 | Cool |
UV index in Shūnan in Spring
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 Shūnan peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (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 | 4 | 6 | 7 | 8 | 10 | 10 | 9 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 8 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Shūnan in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Shūnan is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 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) | 15 | 18 | 23 | 23 | 22 | 19 | 17 | 16 | 13 | 11 | 13 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 18 | Moderate |
| Mar | 23 | Moderate |
| Apr | 23 | Moderate |
| May | 22 | Moderate |
| Jun | 19 | Moderate |
| Jul | 17 | Moderate |
| Aug | 16 | Moderate |
| Sep | 13 | Moderate |
| Oct | 11 | Good |
| Nov | 13 | Moderate |
| Dec | 13 | Moderate |
Where is Shūnan?
Shūnan sits at 34.1°N, 131.8°E, 316 m above sea level, in Japan. The nearest listed city is Tokuyama, 3.0 km away.
Topography around Shūnan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Shūnan.
Within 3 km, the terrain around Shūnan has significant variations in elevation — a maximum elevation change of 556 m around an average of 247 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 785 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,367 m.
The land around Shūnan is covered by trees (85%) within 3 km, trees (68%) and water (21%) within 16 km, and water (49%) and trees (45%) within 80 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 Shūnan (34.0805°, 131.8256°, elevation 316 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.