Minamibōsō weather in January

In January, Minamibōsō sees average daytime highs of 11°C and overnight lows near 7°C, with 104 mm of precipitation across 10 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 11°C through the month. The sky is clear or mostly clear about 48% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Minamibōsō's 2nd-clearest and 1st-windiest month. For the whole year in context, see Minamibōsō's year-round climate.

Daytime high: 11°; 12th warmest
Overnight low: 7°; 2nd coldest
Precipitation: 104 mm; 10 wet days
Daylight: 9 h 54 min; 6:53 AM – 4:46 PM
Cloud cover: 47%; 2nd clearest
Wind: 25 km/h; 1st windiest
Solar energy: 2.7 kWh/m²
Travel score: 2.6; out of 10

← December Minamibōsō year-round climate February →Best places to visit in January

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 11°C through the month.

A typical January day in Minamibōsō reaches about 11°C in the afternoon and slips back to 7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 14°C. Set against its neighbours, January runs about 3°C cooler than December and on par with February.

	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)	12	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Avg low (°C)	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6

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

Minamibōsō weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	11° / 7°	104	10	9.9	2.6
Feb	11° / 7°	104	10.7	10.7	2.5
Mar	13° / 9°	176	14.9	11.7	3.3
Apr	16° / 13°	143	12.1	12.9	4.8
May	19° / 17°	158	11.5	13.8	5.9
Jun	22° / 20°	220	13.7	14.3	5.7
Jul	25° / 23°	149	11.5	14.1	6.5
Aug	26° / 25°	103	9.5	13.3	6.7
Sep	25° / 23°	211	14.6	12.2	6.0
Oct	21° / 18°	253	14.5	11.1	5.9
Nov	17° / 14°	160	13.4	10.2	5.2
Dec	13° / 9°	103	11	9.7	3.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

	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 (%)	69	70	70	70	70	69	69	69	68	67	66	65	64	63	62	62	60	60	59	58	58	58	59	59	58	59	59	60	60	60	60
Cloudier (%)	31	30	30	30	30	31	31	31	32	33	34	35	36	37	38	38	40	40	41	42	42	42	41	41	42	41	41	40	40	40	40

	Clearer (%)	Cloudier (%)
1	69	31
2	70	30
3	70	30
4	70	30
5	70	30
6	69	31
7	69	31
8	69	31
9	68	32
10	67	33
11	66	34
12	65	35
13	64	36
14	63	37
15	62	38
16	62	38
17	60	40
18	60	40
19	59	41
20	58	42
21	58	42
22	58	42
23	59	41
24	59	41
25	58	42
26	59	41
27	59	41
28	60	40
29	60	40
30	60	40
31	60	40

Chance of precipitation in January

Any precipitation

Minamibōsō gets around 104 mm of rain and snow over 10 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 33% and peaks near 36% on the wettest days, and about 0 day brings 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 (%)	29	29	29	29	29	29	30	30	30	31	32	32	33	34	34	35	35	36	36	36	36	36	36	36	35	35	34	34	34	33	33

	Rain chance (%)
1	29
2	29
3	29
4	29
5	29
6	29
7	30
8	30
9	30
10	31
11	32
12	32
13	33
14	34
15	34
16	35
17	35
18	36
19	36
20	36
21	36
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	34
30	33
31	33

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 25 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 25 km/h on the calmest days to 25 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)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 6:53 AM to 6:47 AM, and sunset from 4:34 PM to 5:01 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)	9.7	9.7	9.7	9.7	9.7	9.7	9.7	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.9	9.9	9.9	9.9	9.9	10.0	10.0	10.0	10.0	10.1	10.1	10.1	10.1	10.2	10.2	10.2	10.2
Sunrise (AM)	6:53	6:53	6:53	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:54	6:53	6:53	6:53	6:53	6:53	6:52	6:52	6:52	6:51	6:51	6:50	6:50	6:49	6:49	6:48	6:48	6:47	6:47
Sunset (PM)	4:34	4:35	4:35	4:36	4:37	4:38	4:38	4:39	4:40	4:41	4:42	4:43	4:43	4:44	4:45	4:46	4:47	4:48	4:49	4:50	4:51	4:52	4:53	4:54	4:55	4:56	4:57	4:58	4:59	5:00	5:01

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.7	6:53	4:34
2	9.7	6:53	4:35
3	9.7	6:53	4:35
4	9.7	6:54	4:36
5	9.7	6:54	4:37
6	9.7	6:54	4:38
7	9.7	6:54	4:38
8	9.8	6:54	4:39
9	9.8	6:54	4:40
10	9.8	6:54	4:41
11	9.8	6:54	4:42
12	9.8	6:54	4:43
13	9.8	6:54	4:43
14	9.8	6:53	4:44
15	9.9	6:53	4:45
16	9.9	6:53	4:46
17	9.9	6:53	4:47
18	9.9	6:53	4:48
19	9.9	6:52	4:49
20	10.0	6:52	4:50
21	10.0	6:52	4:51
22	10.0	6:51	4:52
23	10.0	6:51	4:53
24	10.1	6:50	4:54
25	10.1	6:50	4:55
26	10.1	6:49	4:56
27	10.1	6:49	4:57
28	10.2	6:48	4:58
29	10.2	6:48	4:59
30	10.2	6:47	5:00
31	10.2	6:47	5:01

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.7 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.49 kWh/m² in August across the year — January's 2.7 kWh/m² sits near the bottom.

	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)	2.5	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.6	2.7	2.7	2.7	2.7	2.8	2.8	2.8	2.9	2.9	2.9	3.0	3.0
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.5	Moderate
2	2.6	Moderate
3	2.6	Moderate
4	2.6	Moderate
5	2.6	Moderate
6	2.6	Moderate
7	2.6	Moderate
8	2.6	Moderate
9	2.6	Moderate
10	2.6	Moderate
11	2.6	Moderate
12	2.6	Moderate
13	2.6	Moderate
14	2.6	Moderate
15	2.6	Moderate
16	2.6	Moderate
17	2.6	Moderate
18	2.6	Moderate
19	2.6	Moderate
20	2.7	Moderate
21	2.7	Moderate
22	2.7	Moderate
23	2.7	Moderate
24	2.8	Moderate
25	2.8	Moderate
26	2.8	Moderate
27	2.9	Moderate
28	2.9	Moderate
29	2.9	Moderate
30	3.0	Moderate
31	3.0	Moderate

Planning a trip in January

Hazard calendar for Minamibōsō

In seasonPeak

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

Minamibōsō 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 January a good time to visit Minamibōsō?

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

2.6

Sightseeing

11th-best month of the year

0.0

Beach & pool

11th-best month of the year

January is a weaker month for outdoor sightseeing in Minamibōsō.

What to pack for Minamibōsō in January

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

In January, Minamibōsō sees daytime highs around 11°C and nights near 7°C. Pack a warm layer. Worth having: rain gear and a windbreaker. About 10 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Minamibōsō in January

The nearest coast averages about 16°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 24 — about 5.9 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	16	15	15	17	19	21	24	26	25	23	21	18
Comfort	Cool	Cool	Cool	Cool	Cool	Refreshing	Refreshing	Warm	Warm	Refreshing	Refreshing	Cool

	Sea temperature (°C)	Comfort
Jan	16	Cool
Feb	15	Cool
Mar	15	Cool
Apr	17	Cool
May	19	Cool
Jun	21	Refreshing
Jul	24	Refreshing
Aug	26	Warm
Sep	25	Warm
Oct	23	Refreshing
Nov	21	Refreshing
Dec	18	Cool

UV index in Minamibōsō in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Minamibōsō peaks around August 10 at about 10 (extreme) — 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 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	4	5	7	8	9	10	10	8	6	4	2
Level	Moderate	Moderate	Moderate	High	Very high	Very high	Very high	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	5	Moderate
Apr	7	High
May	8	Very high
Jun	9	Very high
Jul	10	Very high
Aug	10	Extreme
Sep	8	Very high
Oct	6	High
Nov	4	Moderate
Dec	2	Moderate

Air quality in Minamibōsō in January

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Minamibōsō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (September, 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)	14	17	21	22	21	16	12	11	11	14	14	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	17	Moderate
Mar	21	Moderate
Apr	22	Moderate
May	21	Moderate
Jun	16	Moderate
Jul	12	Good
Aug	11	Good
Sep	11	Good
Oct	14	Moderate
Nov	14	Moderate
Dec	13	Moderate

Location & terrain

Where is Minamibōsō?

Minamibōsō sits at 35.0°N, 139.9°E, 66 m above sea level, in Japan. The nearest listed city is Tateyama, 8.0 km away.

Topography around Minamibōsō

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

Within 3 km, the terrain around Minamibōsō has only modest variations in elevation — a maximum elevation change of 242 m around an average of 61 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 404 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,220 m.

The land around Minamibōsō is covered by trees (68%) and cropland (23%) within 3 km, trees (49%) and water (40%) within 16 km, and water (64%) within 80 km.

3 km

242 m

trees 68%

16 km

404 m

trees 49%

80 km

1,220 m

water 64%

treesgrasslandcroplandartificial surfaceswater

← December Minamibōsō year-round climate February →Best places to visit in January

January weather nearby: Tateyama 8.0 km · Kamogawa 17 km · Kurihama 30 km · Miura 30 km · Futtsu 33 km · Kimitsu 36 km · Yokosuka 37 km · Katsuura 38 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 Minamibōsō (35.0313°, 139.9265°, elevation 66 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).

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

	Clearer (%)	Cloudier (%)
1	69	31
2	70	30
3	70	30
4	70	30
5	70	30
6	69	31
7	69	31
8	69	31
9	68	32
10	67	33
11	66	34
12	65	35
13	64	36
14	63	37
15	62	38
16	62	38
17	60	40
18	60	40
19	59	41
20	58	42
21	58	42
22	58	42
23	59	41
24	59	41
25	58	42
26	59	41
27	59	41
28	60	40
29	60	40
30	60	40
31	60	40

	Rain chance (%)
1	29
2	29
3	29
4	29
5	29
6	29
7	30
8	30
9	30
10	31
11	32
12	32
13	33
14	34
15	34
16	35
17	35
18	36
19	36
20	36
21	36
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	34
30	33
31	33

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

	Clearer (%)	Cloudier (%)
1	69	31
2	70	30
3	70	30
4	70	30
5	70	30
6	69	31
7	69	31
8	69	31
9	68	32
10	67	33
11	66	34
12	65	35
13	64	36
14	63	37
15	62	38
16	62	38
17	60	40
18	60	40
19	59	41
20	58	42
21	58	42
22	58	42
23	59	41
24	59	41
25	58	42
26	59	41
27	59	41
28	60	40
29	60	40
30	60	40
31	60	40

	Rain chance (%)
1	29
2	29
3	29
4	29
5	29
6	29
7	30
8	30
9	30
10	31
11	32
12	32
13	33
14	34
15	34
16	35
17	35
18	36
19	36
20	36
21	36
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	34
30	33
31	33

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

	Clearer (%)	Cloudier (%)
1	69	31
2	70	30
3	70	30
4	70	30
5	70	30
6	69	31
7	69	31
8	69	31
9	68	32
10	67	33
11	66	34
12	65	35
13	64	36
14	63	37
15	62	38
16	62	38
17	60	40
18	60	40
19	59	41
20	58	42
21	58	42
22	58	42
23	59	41
24	59	41
25	58	42
26	59	41
27	59	41
28	60	40
29	60	40
30	60	40
31	60	40

	Rain chance (%)
1	29
2	29
3	29
4	29
5	29
6	29
7	30
8	30
9	30
10	31
11	32
12	32
13	33
14	34
15	34
16	35
17	35
18	36
19	36
20	36
21	36
22	36
23	36
24	36
25	35
26	35
27	34
28	34
29	34
30	33
31	33

	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