Kōshi weather in March

In March, Kōshi sees average daytime highs of 15°C and overnight lows near 5°C, with 136 mm of precipitation across 12.3 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 16°C by the end. The sky is clear or mostly clear about 27% 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 Kōshi's 8th-clearest and 1st-windiest month. For the whole year in context, see Kōshi's year-round climate.

Daytime high
15°
9th warmest
Overnight low
4th coldest
Precipitation
136 mm
12.3 wet days
Daylight
11 h 42 min
6:34 AM – 6:19 PM
Cloud cover
62%
8th clearest
Wind
9 km/h
1st windiest
Solar energy
4.08 kWh/m²
Travel score
4.1
out of 10

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 16°C by the end.

A typical March day in Kōshi reaches about 15°C in the afternoon and slips back to 5°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 19°C. Set against its neighbours, March runs about 4°C warmer than February and about 5°C cooler than April.

10°20°151015202531
Avg high (°C)Avg low (°C)
1134
2134
3134
4134
5134
6134
7134
8134
9145
10145
11145
12145
13145
14145
15145
16145
17155
18156
19156
20156
21156
22156
23156
24166
25167
26167
27167
28167
29167
30177
31177

How March really feels in Kōshi

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.

Kōshi 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 daysSnow daysDaylight (hours)Travel score
Jan / 648.21.110.12.0
Feb11° / 889.3110.82.6
Mar15° / 13612.30.211.74.1
Apr19° / 10°15511.4012.85.8
May24° / 15°18111.5013.76.5
Jun26° / 19°42017014.15.3
Jul29° / 23°34317.8013.94.3
Aug31° / 24°15814.2013.24.2
Sep28° / 20°15611.3012.25.9
Oct23° / 14°967.5011.27.3
Nov17° / 847.9010.35.8
Dec12° / 697.90.49.93.2

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 17% of March, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24456
34357
44357
54357
64357
74456
84555
94456
104456
114555
124555
134456
144555
154456
164456
174456
184456
194456
204456
214456
224357
234456
244456
254456
264456
274555
284555
294555
304555
314555

Chance of precipitation in March

Any precipitation

Kōshi gets around 136 mm of rain and snow over 12.3 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 39% and peaks near 41% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
538
638
738
837
937
1037
1137
1238
1338
1438
1538
1639
1739
1840
1940
2041
2141
2241
2341
2441
2541
2641
2741
2841
2940
3040
3140

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69910
79910
89910
99910
109820
119820
129820
139820
149820
159730
169730
179730
189730
199730
209730
219640
229640
239640
249640
259541
269541
279451
289451
299352
309262
319262

Wind in March

Winds average 9 km/h in March, the windiest month of the year.

Across March, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 6:53 AM to 6:14 AM, and sunset from 6:07 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:536:07
211.36:526:08
311.36:516:09
411.36:496:10
511.46:486:10
611.46:476:11
711.46:466:12
811.56:446:13
911.56:436:14
1011.56:426:14
1111.66:416:15
1211.66:396:16
1311.66:386:17
1411.76:376:17
1511.76:356:18
1611.76:346:19
1711.86:336:20
1811.86:316:20
1911.96:306:21
2011.96:296:22
2111.96:276:23
2212.06:266:23
2312.06:256:24
2412.06:236:25
2512.16:226:26
2612.16:216:26
2712.16:196:27
2812.26:186:28
2912.26:176:29
3012.26:156:29
3112.36:146:30

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.08 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 5.18 kWh/m² in May across the year — March's 4.08 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
114.0Moderate
124.0Bright
134.0Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.4Bright
284.4Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in March

Hazard calendar for Kōshi

In seasonPeak

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

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

Kōshi'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 Kōshi?

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

4.1
Sightseeing
9th-best month of the year
0.2
Beach & pool
9th-best month of the year

March is a reasonable time to visit Kōshi for sightseeing.

What to pack for Kōshi in March

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

In March, Kōshi sees daytime highs around 15°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Kōshi 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 14 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 May 27 to Nov 13 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Kōshi 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 Kōshi peaks around June 22 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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 22UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Kōshi 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 Kōshi 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 Kōshi?

Kōshi sits at 32.9°N, 130.8°E, 71 m above sea level, in Japan. The nearest listed city is Okino, 3.0 km away.

Topography around Kōshi

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

Within 3 km, the terrain around Kōshi has only modest variations in elevation — a maximum elevation change of 97 m around an average of 80 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,071 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.

The land around Kōshi is covered by cropland (38%), artificial surfaces (32%) and trees (22%) within 3 km, trees (45%), cropland (27%) and artificial surfaces (24%) within 16 km, and trees (68%) within 80 km.

3 km
97 m
16 km
1,071 m
80 km
1,765 m
treesgrasslandcroplandartificial surfacesbare terrainwater
March weather nearby: Okino 3.0 km · Uekimachi-mōno 8.0 km · Ōzu 9.0 km · Kikuchi 11 km · Kumamoto 12 km · Kotō 13 km · Shimada 15 km · Yamaga 16 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 Kōshi (32.8927°, 130.7757°, elevation 71 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).