Arai weather in March

In March, Arai sees average daytime highs of 7°C and overnight lows near -1°C, with 162 mm of precipitation across 20 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 5°C in the first days to 9°C by the end. The sky is clear or mostly clear about 18% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Arai's 6th-clearest and 3rd-windiest month. For the whole year in context, see Arai's year-round climate.

Daytime high
9th warmest
Overnight low
-1°
4th coldest
Precipitation
162 mm
20 wet days
Daylight
11 h 42 min
6:06 AM – 5:48 PM
Cloud cover
68%
6th clearest
Wind
8 km/h
3rd windiest
Solar energy
4.38 kWh/m²
Travel score
0.6
out of 10

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 5°C in the first days to 9°C by the end.

A typical March day in Arai reaches about 7°C in the afternoon and slips back to -1°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 12°C. Set against its neighbours, March runs about 4°C warmer than February and about 7°C cooler than April.

-10°10°20°151015202531
Avg high (°C)Avg low (°C)
15-2
25-2
35-2
45-2
55-1
65-1
75-1
85-1
96-1
106-1
116-1
126-1
136-1
146-1
157-1
167-1
177-1
1870
1970
2070
2180
2280
2380
2480
2580
2680
2791
2891
2991
3091
3191

How March really feels in Arai

Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

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

Arai weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°24225.423.59.70.0
Feb / -3°17920.918.410.60.0
Mar / -1°1622013.311.70.6
Apr13° / 11714.82.712.93.4
May19° / 10°130140145.6
Jun23° / 16°16616.5014.55.4
Jul26° / 20°24921.1014.34.8
Aug28° / 21°19119.7013.44.8
Sep24° / 17°20417.2012.35.4
Oct18° / 11°18816.40114.9
Nov12° / 16618.23.4102.5
Dec / -1°2272315.69.50.3

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
43070
53169
63169
73268
83268
93367
103367
113367
123367
133565
143565
153664
163664
173763
183763
193763
203664
213664
223664
233664
243763
253763
263862
273862
283961
293961
304060
314159

Chance of precipitation in March

Any precipitationSnow

Arai gets around 162 mm of rain and snow over 20 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 64% and peaks near 68% on the wettest days, and about 13 days bring snow. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
16854
26854
36853
46853
56753
66752
76752
86651
96650
106650
116649
126548
136547
146546
156545
166544
176543
186442
196441
206439
216338
226337
236236
246234
256133
266132
276031
285929
295828
305827
315725

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in March

Winds average 8 km/h in March.

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

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 06 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 72 minutes over March. Sunrise moves from 6:27 AM to 5:43 AM, and sunset from 5:34 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:275:34
211.16:265:35
311.26:245:36
411.26:235:37
511.36:225:38
611.36:205:39
711.36:195:39
811.46:175:40
911.46:165:41
1011.56:145:42
1111.56:135:43
1211.56:125:44
1311.66:105:45
1411.66:095:46
1511.76:075:47
1611.76:065:48
1711.76:045:49
1811.86:035:50
1911.86:015:51
2011.96:005:52
2111.95:585:53
2211.95:565:53
2312.05:555:54
2412.05:535:55
2512.15:525:56
2612.15:505:57
2712.25:495:58
2812.25:475:59
2912.25:466:00
3012.35:446:01
3112.35:436:01

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.38 kWh/m².

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.68 kWh/m² in May across the year — March's 4.38 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.9Moderate
43.9Moderate
53.9Moderate
64.0Moderate
74.0Bright
84.1Bright
94.1Bright
104.2Bright
114.2Bright
124.3Bright
134.3Bright
144.3Bright
154.4Bright
164.4Bright
174.5Bright
184.5Bright
194.5Bright
204.6Bright
214.6Bright
224.6Bright
234.7Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in March

Hazard calendar for Arai

In seasonPeak

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

Arai 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 March a good time to visit Arai?

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

0.6
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Arai.

What to pack for Arai in March

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

In March, Arai sees daytime highs around 7°C and nights near -1°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 20 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Arai in March

The nearest coast averages about 10°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 16 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 20 to Nov 1 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec15Cool

UV index in Arai in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arai peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep9Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Arai 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 Arai is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 1510 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug13Moderate
Sep12Good
Oct11Good
Nov11Good
Dec10Good
Location & terrain

Where is Arai?

Arai sits at 37.0°N, 138.2°E, 175 m above sea level, in Japan. The nearest listed city is Myoko, 4.0 km away.

Topography around Arai

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

Within 3 km, the terrain around Arai has significant variations in elevation — a maximum elevation change of 416 m around an average of 193 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,437 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,978 m.

The land around Arai is covered by trees (52%) and cropland (30%) within 3 km, trees (79%) within 16 km, and trees (60%) and water (29%) within 80 km.

3 km
416 m
16 km
2,437 m
80 km
2,978 m
treesgrasslandcroplandartificial surfacesbare terrainwater
March weather nearby: Myoko 4.0 km · Jōetsu 16 km · Iiyama 21 km · Nakano 31 km · Itoigawa 34 km · Nagano 39 km · Suzaka 40 km · Kashiwazaki 50 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 Arai (37.0006°, 138.2259°, elevation 175 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).