Sayō weather in January

In January, Sayō sees average daytime highs of 8°C and overnight lows near 0°C, with 44 mm of precipitation across 5.8 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 8°C through the month. The sky is clear or mostly clear about 19% 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 Sayō's 5th-clearest and 3rd-windiest month. For the whole year in context, see Sayō's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
44 mm
5.8 wet days
Daylight
9 h 54 min
7:15 AM – 5:08 PM
Cloud cover
61%
5th clearest
Wind
9 km/h
3rd windiest
Solar energy
2.57 kWh/m²
Travel score
1.4
out of 10

Sayō is town in Sayo District, Hyogo Prefecture, Japan.

Density
52/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 8°C through the month.

A typical January day in Sayō reaches about 8°C in the afternoon and slips back to 0°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 11°C. Set against its neighbours, January runs about 3°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
191
281
381
480
580
680
780
880
980
1080
1180
1280
1380
1480
1580
1680
1780
1880
1980
2080
2180
2280
2380
2480
2580
2680
2780
2880
2980
3080
3180

How January really feels in Sayō

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Sayō weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 445.81.69.91.4
Feb / 567.2210.71.8
Mar13° / 11010.80.411.73.4
Apr18° / 12210.4012.95.7
May23° / 13°14510.6013.86.6
Jun26° / 18°18513.5014.35.8
Jul30° / 22°21715.7014.14.4
Aug31° / 23°13413.3013.34.2
Sep27° / 19°18411.8012.25.9
Oct22° / 13°1178011.17.0
Nov16° / 626.1010.25.4
Dec10° / 5160.69.72.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 33% of January, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
25941
35941
45941
55842
65941
75743
85743
95644
105545
115446
125446
135347
145248
155149
165149
175050
184951
194951
204852
214852
224852
234753
244753
254753
264852
274753
284753
294852
304753
314852

Chance of precipitation in January

Any precipitationSnow

Sayō gets around 44 mm of rain and snow over 5.8 wet days in January, the driest month. 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 2 days bring snow. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1154
2154
3154
4154
5154
6154
7164
8164
9164
10174
11184
12195
13195
14205
15215
16216
17226
18226
19226
20237
21237
22237
23237
24237
25237
26227
27228
28228
29218
30218
31218

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 9 km/h in January.

Across January, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 7:15 AM to 7:09 AM, and sunset from 4:56 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:154:56
29.77:154:57
39.77:164:58
49.77:164:58
59.77:164:59
69.77:165:00
79.77:165:01
89.87:165:02
99.87:165:02
109.87:165:03
119.87:165:04
129.87:165:05
139.87:165:06
149.97:165:07
159.97:155:08
169.97:155:08
179.97:155:09
189.97:155:10
199.97:145:11
2010.07:145:12
2110.07:145:13
2210.07:135:14
2310.07:135:15
2410.17:135:16
2510.17:125:17
2610.17:125:18
2710.17:115:19
2810.27:115:20
2910.27:105:21
3010.27:095:22
3110.27:095:23

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.57 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.73 kWh/m² in May across the year — January's 2.57 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.9Moderate
312.9Moderate
Planning a trip in January

Hazard calendar for Sayō

In seasonPeak

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

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

Sayō's rainy season runs March–October, 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 January a good time to visit Sayō?

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

1.4
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 Sayō.

What to pack for Sayō in January

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

In January, Sayō sees daytime highs around 8°C and nights near 0°C. Pack a warm layer. Worth having: a heavy coat. About 6 days see rain.

a warm layera heavy coat

Sea temperature near Sayō 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 at the nearest coast (about 42 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 Jun 7 to Nov 12 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov20Cool
Dec16Cool

UV index in Sayō 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 Sayō peaks around July 15 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highModerateJul 15UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May9Very high
Jun10Very high
Jul11Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Sayō 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 Sayō is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1421 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun17Moderate
Jul14Moderate
Aug12Moderate
Sep12Good
Oct10Good
Nov12Good
Dec11Good
Location & terrain

Where is Sayō?

Sayō sits at 35.0°N, 134.4°E, 155 m above sea level, in Japan. The nearest listed city is Kamigōri, 14 km away.

Topography around Sayō

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

Within 3 km, the terrain around Sayō has significant variations in elevation — a maximum elevation change of 354 m around an average of 183 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 844 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,489 m.

The land around Sayō is covered by trees (76%) within 3 km, trees (89%) within 16 km, and trees (64%) and water (23%) within 80 km.

3 km
354 m
16 km
844 m
80 km
1,489 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Kamigōri 14 km · Yamazakichō-nakabirose 17 km · Shisō 19 km · Hayashino 19 km · Tatsunochō-tominaga 23 km · Aioi 24 km · Tatsuno 25 km · Bizen 27 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 Sayō (35.0027°, 134.359°, elevation 155 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).