Karuizawa weather in March

In March, Karuizawa sees average daytime highs of 8°C and overnight lows near -1°C, with 110 mm of precipitation across 13.1 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 6°C in the first days to 10°C by the end. The sky is clear or mostly clear about 34% 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 Karuizawa's 5th-clearest and 3rd-windiest month. For the whole year in context, see Karuizawa's year-round climate.

Daytime high: 8°; 9th warmest
Overnight low: -1°; 4th coldest
Precipitation: 110 mm; 13.1 wet days
Daylight: 11 h 42 min; 6:04 AM – 5:47 PM
Cloud cover: 57%; 5th clearest
Wind: 8 km/h; 3rd windiest
Solar energy: 4.66 kWh/m²
Travel score: 1.3; out of 10

← February Karuizawa year-round climate April →Best places to visit in March

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 6°C in the first days to 10°C by the end.

A typical March day in Karuizawa reaches about 8°C in the afternoon and slips back to -1°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 14°C. Set against its neighbours, March runs about 4°C warmer than February and about 6°C cooler than April.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	6	6	6	6	6	6	7	7	7	7	7	7	8	8	8	8	8	8	9	9	9	9	9	9	10	10	10	10	10	11	11
Avg low (°C)	-3	-3	-3	-3	-2	-2	-2	-2	-2	-2	-2	-2	-2	-1	-1	-1	-1	-1	-1	-1	0	0	0	0	0	0	1	1	1	1	1

	Avg high (°C)	Avg low (°C)
1	6	-3
2	6	-3
3	6	-3
4	6	-3
5	6	-2
6	6	-2
7	7	-2
8	7	-2
9	7	-2
10	7	-2
11	7	-2
12	7	-2
13	8	-2
14	8	-1
15	8	-1
16	8	-1
17	8	-1
18	8	-1
19	9	-1
20	9	-1
21	9	0
22	9	0
23	9	0
24	9	0
25	10	0
26	10	0
27	10	1
28	10	1
29	10	1
30	11	1
31	11	1

How March really feels in Karuizawa

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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Karuizawa weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	3° / -4°	59	7.4	6.5	9.8	0.0
Feb	4° / -4°	60	8.6	6.7	10.6	0.0
Mar	8° / -1°	110	13.1	7.1	11.7	1.3
Apr	14° / 5°	122	13.8	2.1	12.9	3.7
May	19° / 10°	165	16.8	0.1	13.9	5.1
Jun	21° / 15°	254	22.7	0	14.4	4.3
Jul	25° / 19°	282	24	0	14.2	4.5
Aug	26° / 19°	240	24.1	0	13.4	4.5
Sep	22° / 16°	241	20.6	0	12.2	4.8
Oct	17° / 9°	195	15.5	0	11.1	4.7
Nov	11° / 3°	72	8.8	0.6	10.1	3.1
Dec	6° / -1°	49	7.6	4.4	9.6	0.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 20% of March, with mostly cloudy or overcast conditions the remaining 46%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	56	55	55	55	55	55	55	56	56	56	56	55	55	55	55	55	55	54	54	53	53	53	52	52	52	51	51	51	51	50	50
Cloudier (%)	44	45	45	45	45	45	45	44	44	44	44	45	45	45	45	45	45	46	46	47	47	47	48	48	48	49	49	49	49	50	50

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	56	44
10	56	44
11	56	44
12	55	45
13	55	45
14	55	45
15	55	45
16	55	45
17	55	45
18	54	46
19	54	46
20	53	47
21	53	47
22	53	47
23	52	48
24	52	48
25	52	48
26	51	49
27	51	49
28	51	49
29	51	49
30	50	50
31	50	50

Chance of precipitation in March

Any precipitationSnow

Karuizawa gets around 110 mm of rain and snow over 13.1 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 41% and peaks near 45% on the wettest days, and about 7 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	38	38	39	39	39	39	39	39	39	38	38	38	39	39	39	40	40	41	42	42	43	43	44	44	45	45	45	45	44	44	44
Snow chance (%)	26	26	27	27	27	26	26	25	25	24	24	23	23	22	22	22	21	21	21	21	20	20	20	20	20	19	19	18	18	17	16

	Rain chance (%)	Snow chance (%)
1	38	26
2	38	26
3	39	27
4	39	27
5	39	27
6	39	26
7	39	26
8	39	25
9	39	25
10	38	24
11	38	24
12	38	23
13	39	23
14	39	22
15	39	22
16	40	22
17	40	21
18	41	21
19	42	21
20	42	21
21	43	20
22	43	20
23	44	20
24	44	20
25	45	20
26	45	19
27	45	19
28	45	18
29	44	18
30	44	17
31	44	16

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	8	calm
12	8	calm
13	8	calm
14	8	calm
15	8	calm
16	8	calm
17	8	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	8	calm
26	8	calm
27	8	calm
28	8	calm
29	8	calm
30	8	calm
31	8	calm

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 6:25 AM to 5:41 AM, and sunset from 5:33 PM to 6:00 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	11.1	11.2	11.2	11.2	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.3	12.3
Sunrise (AM)	6:25	6:23	6:22	6:21	6:19	6:18	6:17	6:15	6:14	6:12	6:11	6:10	6:08	6:07	6:05	6:04	6:02	6:01	5:59	5:58	5:56	5:55	5:53	5:52	5:50	5:49	5:47	5:46	5:44	5:43	5:41
Sunset (PM)	5:33	5:34	5:35	5:36	5:36	5:37	5:38	5:39	5:40	5:41	5:42	5:43	5:44	5:45	5:46	5:47	5:47	5:48	5:49	5:50	5:51	5:52	5:53	5:54	5:54	5:55	5:56	5:57	5:58	5:59	6:00

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.1	6:25	5:33
2	11.2	6:23	5:34
3	11.2	6:22	5:35
4	11.2	6:21	5:36
5	11.3	6:19	5:36
6	11.3	6:18	5:37
7	11.4	6:17	5:38
8	11.4	6:15	5:39
9	11.4	6:14	5:40
10	11.5	6:12	5:41
11	11.5	6:11	5:42
12	11.6	6:10	5:43
13	11.6	6:08	5:44
14	11.6	6:07	5:45
15	11.7	6:05	5:46
16	11.7	6:04	5:47
17	11.8	6:02	5:47
18	11.8	6:01	5:48
19	11.8	5:59	5:49
20	11.9	5:58	5:50
21	11.9	5:56	5:51
22	12.0	5:55	5:52
23	12.0	5:53	5:53
24	12.0	5:52	5:54
25	12.1	5:50	5:54
26	12.1	5:49	5:55
27	12.1	5:47	5:56
28	12.2	5:46	5:57
29	12.2	5:44	5:58
30	12.3	5:43	5:59
31	12.3	5:41	6:00

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.66 kWh/m².

For context, solar energy here swings from a low near 2.51 kWh/m² to a high of 5.52 kWh/m² in May across the year — March's 4.66 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.2	4.3	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.8	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.3	Bright
3	4.3	Bright
4	4.3	Bright
5	4.3	Bright
6	4.4	Bright
7	4.4	Bright
8	4.5	Bright
9	4.5	Bright
10	4.5	Bright
11	4.6	Bright
12	4.6	Bright
13	4.6	Bright
14	4.7	Bright
15	4.7	Bright
16	4.7	Bright
17	4.7	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.8	Bright
23	4.9	Bright
24	4.9	Bright
25	4.9	Bright
26	4.9	Bright
27	5.0	Bright
28	5.0	Bright
29	5.0	Bright
30	5.0	Bright
31	5.0	Bright

Planning a trip in March

Hazard calendar for Karuizawa

In seasonPeak

None of Karuizawa's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Karuizawa's rainy season runs May–October, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is March a good time to visit Karuizawa?

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

1.3

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 Karuizawa.

What to pack for Karuizawa in March

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

In March, Karuizawa sees daytime highs around 8°C and nights near -1°C. Pack a warm layer. Worth having: a heavy coat, rain gear and sun protection. About 13 days see rain.

a warm layera heavy coatrain gearsun protection

UV index in Karuizawa 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 Karuizawa peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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)	2	4	6	7	8	9	10	9	9	6	3	2
Level	Moderate	Moderate	High	High	Very high	Very high	Very high	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	6	High
Apr	7	High
May	8	Very high
Jun	9	Very high
Jul	10	Very high
Aug	9	Very high
Sep	9	Very high
Oct	6	High
Nov	3	Moderate
Dec	2	Moderate

Air quality in Karuizawa 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 Karuizawa 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	11	14	19	21	20	18	15	14	13	12	11	10
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	14	Moderate
Mar	19	Moderate
Apr	21	Moderate
May	20	Moderate
Jun	18	Moderate
Jul	15	Moderate
Aug	14	Moderate
Sep	13	Moderate
Oct	12	Moderate
Nov	11	Good
Dec	10	Good

Location & terrain

Where is Karuizawa?

Karuizawa sits at 36.4°N, 138.6°E, 952 m above sea level, in Japan. The nearest listed city is Miyota, 11 km away.

Topography around Karuizawa

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

Within 3 km, the terrain around Karuizawa has large variations in elevation — a maximum elevation change of 632 m around an average of 1,004 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,316 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,985 m.

The land around Karuizawa is covered by trees (86%) within 3 km, trees (86%) within 16 km, and trees (80%) within 80 km.

3 km

632 m

trees 86%

16 km

2,316 m

trees 86%

80 km

2,985 m

trees 80%

treesgrasslandcroplandartificial surfacesbare terrainwater

← February Karuizawa year-round climate April →Best places to visit in March

March weather nearby: Miyota 11 km · Komoro 18 km · Saku 20 km · Annaka 24 km · Tōmi 24 km · Tomioka 26 km · Ueda 32 km · Nakanojō 32 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 Karuizawa (36.35°, 138.6333°, elevation 952 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. 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).

	Avg high (°C)	Avg low (°C)
1	6	-3
2	6	-3
3	6	-3
4	6	-3
5	6	-2
6	6	-2
7	7	-2
8	7	-2
9	7	-2
10	7	-2
11	7	-2
12	7	-2
13	8	-2
14	8	-1
15	8	-1
16	8	-1
17	8	-1
18	8	-1
19	9	-1
20	9	-1
21	9	0
22	9	0
23	9	0
24	9	0
25	10	0
26	10	0
27	10	1
28	10	1
29	10	1
30	11	1
31	11	1

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	56	44
10	56	44
11	56	44
12	55	45
13	55	45
14	55	45
15	55	45
16	55	45
17	55	45
18	54	46
19	54	46
20	53	47
21	53	47
22	53	47
23	52	48
24	52	48
25	52	48
26	51	49
27	51	49
28	51	49
29	51	49
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	38	26
2	38	26
3	39	27
4	39	27
5	39	27
6	39	26
7	39	26
8	39	25
9	39	25
10	38	24
11	38	24
12	38	23
13	39	23
14	39	22
15	39	22
16	40	22
17	40	21
18	41	21
19	42	21
20	42	21
21	43	20
22	43	20
23	44	20
24	44	20
25	45	20
26	45	19
27	45	19
28	45	18
29	44	18
30	44	17
31	44	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	6	-3
2	6	-3
3	6	-3
4	6	-3
5	6	-2
6	6	-2
7	7	-2
8	7	-2
9	7	-2
10	7	-2
11	7	-2
12	7	-2
13	8	-2
14	8	-1
15	8	-1
16	8	-1
17	8	-1
18	8	-1
19	9	-1
20	9	-1
21	9	0
22	9	0
23	9	0
24	9	0
25	10	0
26	10	0
27	10	1
28	10	1
29	10	1
30	11	1
31	11	1

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	56	44
10	56	44
11	56	44
12	55	45
13	55	45
14	55	45
15	55	45
16	55	45
17	55	45
18	54	46
19	54	46
20	53	47
21	53	47
22	53	47
23	52	48
24	52	48
25	52	48
26	51	49
27	51	49
28	51	49
29	51	49
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	38	26
2	38	26
3	39	27
4	39	27
5	39	27
6	39	26
7	39	26
8	39	25
9	39	25
10	38	24
11	38	24
12	38	23
13	39	23
14	39	22
15	39	22
16	40	22
17	40	21
18	41	21
19	42	21
20	42	21
21	43	20
22	43	20
23	44	20
24	44	20
25	45	20
26	45	19
27	45	19
28	45	18
29	44	18
30	44	17
31	44	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	6	-3
2	6	-3
3	6	-3
4	6	-3
5	6	-2
6	6	-2
7	7	-2
8	7	-2
9	7	-2
10	7	-2
11	7	-2
12	7	-2
13	8	-2
14	8	-1
15	8	-1
16	8	-1
17	8	-1
18	8	-1
19	9	-1
20	9	-1
21	9	0
22	9	0
23	9	0
24	9	0
25	10	0
26	10	0
27	10	1
28	10	1
29	10	1
30	11	1
31	11	1

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	55	45
6	55	45
7	55	45
8	56	44
9	56	44
10	56	44
11	56	44
12	55	45
13	55	45
14	55	45
15	55	45
16	55	45
17	55	45
18	54	46
19	54	46
20	53	47
21	53	47
22	53	47
23	52	48
24	52	48
25	52	48
26	51	49
27	51	49
28	51	49
29	51	49
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	38	26
2	38	26
3	39	27
4	39	27
5	39	27
6	39	26
7	39	26
8	39	25
9	39	25
10	38	24
11	38	24
12	38	23
13	39	23
14	39	22
15	39	22
16	40	22
17	40	21
18	41	21
19	42	21
20	42	21
21	43	20
22	43	20
23	44	20
24	44	20
25	45	20
26	45	19
27	45	19
28	45	18
29	44	18
30	44	17
31	44	16

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100