Unzen weather in March

In March, Unzen sees average daytime highs of 15°C and overnight lows near 8°C, with 134 mm of rain across 11.6 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 17°C by the end. The sky is clear or mostly clear about 30% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Unzen's 6th-clearest and 3rd-windiest month. For the whole year in context, see Unzen's year-round climate.

Daytime high
15°
9th warmest
Overnight low
4th coldest
Rainfall
134 mm
11.6 wet days
Daylight
11 h 42 min
6:36 AM – 6:21 PM
Cloud cover
62%
6th clearest
Wind
11 km/h
3rd windiest
Solar energy
4.11 kWh/m²
Travel score
4.6
out of 10

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 17°C by the end.

A typical March day in Unzen reaches about 15°C in the afternoon and slips back to 8°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 20°C. Set against its neighbours, March runs about 4°C warmer than February and about 5°C cooler than April.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1147
2147
3147
4147
5147
6147
7147
8147
9147
10157
11157
12158
13158
14158
15158
16158
17168
18168
19168
20169
21169
22169
23169
24169
25179
26179
27179
281710
291710
301710
311810

How March really feels in Unzen

Once humidity and wind are folded in, March 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

March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Unzen weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 707.710.12.7
Feb12° / 88910.83.2
Mar15° / 13411.611.84.6
Apr20° / 12°15110.912.86.1
May24° / 16°18211.113.76.6
Jun27° / 21°4291714.15.2
Jul30° / 24°34818.513.93.7
Aug32° / 25°17914.513.23.5
Sep29° / 22°20312.412.25.3
Oct24° / 17°1127.911.27.3
Nov18° / 12°1028.410.36.2
Dec13° / 817.69.93.9

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34456
44555
54555
64555
74456
84456
94456
104456
114456
124555
134555
144456
154456
164456
174456
184456
194456
204357
214456
224456
234456
244456
254456
264555
274456
284555
294555
304555
314555

Chance of precipitation in March

Any precipitation

Unzen gets around 134 mm of rain over 11.6 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
736
836
936
1035
1135
1235
1335
1435
1536
1636
1736
1837
1937
2038
2138
2238
2339
2439
2539
2639
2739
2839
2938
3038
3138

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March 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%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
198200
297300
397300
497300
597300
697300
797300
897300
996400
1096400
1195500
1295500
1395500
1494600
1594600
1693610
1793610
1892710
1992710
2092710
2192710
2292710
2391810
2491810
2591810
2690820
2790820
2890820
2988831
3088831
3187931

Wind in March

Winds average 11 km/h in March.

Across March, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 12 min at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over March. Sunrise moves from 6:55 AM to 6:16 AM, and sunset from 6:09 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:556:09
211.36:546:10
311.36:536:11
411.36:516:12
511.46:506:13
611.46:496:13
711.46:486:14
811.56:476:15
911.56:456:16
1011.56:446:17
1111.66:436:17
1211.66:416:18
1311.66:406:19
1411.76:396:20
1511.76:386:20
1611.76:366:21
1711.86:356:22
1811.86:346:23
1911.96:326:23
2011.96:316:24
2111.96:296:25
2212.06:286:26
2312.06:276:26
2412.06:256:27
2512.16:246:28
2612.16:236:28
2712.16:216:29
2812.26:206:30
2912.26:196:31
3012.26:176:31
3112.36:166:32

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.11 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.28 kWh/m² in May across the year — March's 4.11 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.7Moderate
33.7Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.9Moderate
83.9Moderate
93.9Moderate
104.0Moderate
114.0Bright
124.0Bright
134.1Bright
144.1Bright
154.1Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.4Bright
264.4Bright
274.4Bright
284.5Bright
294.5Bright
304.5Bright
314.6Bright
Planning a trip in March

Hazard calendar for Unzen

In seasonPeak

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

Unzen sits in the Pacific typhoon belt; the season peaks July–October.

Unzen's rainy season runs June–July, when most of the year's rain falls.

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

Is March a good time to visit Unzen?

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

4.6
Sightseeing
7th-best month of the year
0.5
Beach & pool
9th-best month of the year

March is a reasonable time to visit Unzen for sightseeing.

What to pack for Unzen in March

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

In March, Unzen sees daytime highs around 15°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Unzen in March

The nearest coast averages about 14°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 27 to Nov 14 — about 5.7 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Unzen in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 Unzen peaks around July 13 at about 10 (extreme) — 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateJul 13UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Unzen in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Unzen is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Unzen?

Unzen sits at 32.8°N, 130.2°E, 546 m above sea level, in Japan. The nearest listed city is Minamishimabara, 11 km away.

Topography around Unzen

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

Within 3 km, the terrain around Unzen has large variations in elevation — a maximum elevation change of 954 m around an average of 559 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,450 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,724 m.

The land around Unzen is covered by trees (96%) within 3 km, water (42%) and trees (37%) within 16 km, and trees (46%) and water (39%) within 80 km.

3 km
954 m
16 km
1,450 m
80 km
1,724 m
treesgrasslandcroplandartificial surfaceswater
March weather nearby: Minamishimabara 11 km · Shimabara 11 km · Isahaya 21 km · Nagasu 26 km · Ōyanomachi-noboritate 26 km · Arao 30 km · Ōmura 32 km · Nagasaki 34 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 Unzen (32.7711°, 130.2484°, elevation 546 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).