Saikū weather in January

In January, Saikū sees average daytime highs of 10°C and overnight lows near 5°C, with 70 mm of precipitation across 5.9 wet days and about 10 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 10°C through the month. The sky is clear or mostly clear about 54% 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 18 min by month's end. Set against the rest of the year, January is Saikū's 2nd-clearest and 1st-windiest month. For the whole year in context, see Saikū's year-round climate.

Daytime high
10°
12th warmest
Overnight low
2nd coldest
Precipitation
70 mm
5.9 wet days
Daylight
9 h 54 min
7:05 AM – 5:00 PM
Cloud cover
44%
2nd clearest
Wind
18 km/h
1st windiest
Solar energy
2.95 kWh/m²
Travel score
2.5
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 10°C through the month.

A typical January day in Saikū reaches about 10°C in the afternoon and slips back to 5°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 13°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

10°15°151015202531
Avg high (°C)Avg low (°C)
1116
2116
3115
4105
5105
6105
7105
8105
9105
10105
11105
12105
13105
14105
15105
16105
17105
18105
19105
20105
21105
22105
23105
24104
25104
26104
27104
28104
29104
30104
31104

How January really feels in Saikū

Once humidity and wind are folded in, January 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

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

Saikū weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 705.9102.5
Feb11° / 72710.72.8
Mar14° / 12610.411.74.1
Apr18° / 12°1371012.85.8
May22° / 16°16411.813.86.4
Jun25° / 20°2351514.35.6
Jul29° / 24°19114.514.14.7
Aug30° / 25°14413.613.34.4
Sep27° / 22°24715.312.25.4
Oct22° / 17°25412.311.16.5
Nov17° / 12°1108.210.25.9
Dec12° / 706.49.73.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
27921
37921
47921
57723
67723
77624
87624
97525
107426
117228
127228
137129
147030
156931
166832
176733
186634
196535
206535
216436
226436
236436
246436
256436
266436
276535
286634
296634
306634
316832

Chance of precipitation in January

Any precipitation

Saikū gets around 70 mm of rain and snow over 5.9 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 20% and peaks near 23% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
116
216
316
416
516
616
716
817
917
1018
1119
1220
1321
1421
1522
1622
1723
1823
1923
2023
2123
2223
2323
2422
2522
2622
2721
2821
2921
3020
3120

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.

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 January

Winds average 18 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:05 AM to 6:59 AM, and sunset from 4:48 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:054:48
29.77:054:49
39.77:054:50
49.87:054:51
59.87:064:51
69.87:064:52
79.87:064:53
89.87:064:54
99.87:064:54
109.87:064:55
119.87:064:56
129.97:064:57
139.97:054:58
149.97:054:59
159.97:055:00
169.97:055:00
179.97:055:01
1810.07:055:02
1910.07:045:03
2010.07:045:04
2110.07:045:05
2210.07:035:06
2310.17:035:07
2410.17:025:08
2510.17:025:09
2610.17:025:10
2710.27:015:11
2810.27:015:12
2910.27:005:13
3010.26:595:14
3110.36:595:15

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.95 kWh/m².

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 5.67 kWh/m² in May across the year — January's 2.95 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.8Moderate
22.8Moderate
32.8Moderate
42.8Moderate
52.8Moderate
62.8Moderate
72.8Moderate
82.8Moderate
92.8Moderate
102.8Moderate
112.8Moderate
122.8Moderate
132.8Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.9Moderate
202.9Moderate
213.0Moderate
223.0Moderate
233.0Moderate
243.0Moderate
253.1Moderate
263.1Moderate
273.1Moderate
283.2Moderate
293.2Moderate
303.2Moderate
313.3Moderate
Planning a trip in January

Hazard calendar for Saikū

In seasonPeak

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

Saikū 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 Saikū?

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

2.5
Sightseeing
12th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Saikū.

What to pack for Saikū in January

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

In January, Saikū sees daytime highs around 10°C and nights near 5°C. Pack a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Saikū in January

The nearest coast averages about 14°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 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 31 to Nov 11 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Saikū in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saikū peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 13UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Saikū 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 Saikū is worst in March — around 26 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (July, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2326 µg/m³Jul 2316 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb21Moderate
Mar26Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul16Moderate
Aug16Moderate
Sep17Moderate
Oct19Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Saikū?

Saikū sits at 34.5°N, 136.6°E, 10 m above sea level, in Japan. The nearest listed city is Tamaru, 6.0 km away.

Topography around Saikū

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

Within 3 km, the terrain around Saikū has only modest variations in elevation — a maximum elevation change of 64 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 604 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,887 m.

The land around Saikū is covered by cropland (50%) and artificial surfaces (26%) within 3 km, trees (34%) and water (33%) within 16 km, and trees (42%) and water (38%) within 80 km.

3 km
64 m
16 km
604 m
80 km
1,887 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Tamaru 6.0 km · Ise 8.0 km · Matsusaka 10 km · Toba 20 km · Hisai-motomachi 21 km · Tsu 25 km · Shima 29 km · Kawage 31 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 Saikū (34.5333°, 136.6333°, elevation 10 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).