Komae weather in January

In January, Komae sees average daytime highs of 9°C and overnight lows near -0°C, with 69 mm of precipitation across 7.5 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 9°C through the month. The sky is clear or mostly clear about 59% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Komae's 1st-clearest and 5th-windiest month. For the whole year in context, see Komae's year-round climate.

Daytime high
12th warmest
Overnight low
-0°
1st coldest
Precipitation
69 mm
7.5 wet days
Daylight
9 h 48 min
6:56 AM – 4:46 PM
Cloud cover
40%
1st clearest
Wind
9 km/h
5th windiest
Solar energy
2.82 kWh/m²
Travel score
1.9
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 9°C through the month.

A typical January day in Komae reaches about 9°C in the afternoon and slips back to -0°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 12°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1101
2101
391
491
590
690
790
890
990
1090
1190
1290
1390
1490
1590
1690
1780
1880
1980
2080
2180
2280
2380
2480
2580
2680
279-1
289-1
2990
3090
3190

How January really feels in Komae

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.

Komae 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°697.52.59.91.9
Feb10° / 658.42.510.72.2
Mar13° / 12013.21.511.73.4
Apr18° / 12312.80.312.95.3
May22° / 14°13913.2013.96.1
Jun25° / 19°17715.4014.45.5
Jul29° / 23°18216.4014.24.6
Aug30° / 24°14215.5013.34.2
Sep26° / 20°20414.9012.25.5
Oct21° / 14°21513.7011.15.9
Nov16° / 9210.2010.15.0
Dec11° / 617.40.49.63.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17822
27822
37822
47822
57723
67723
77723
87624
97525
107426
117327
127228
137129
147030
156931
166832
176832
186733
196733
206733
216733
226733
236733
246832
256832
266832
276931
287030
297030
307030
317030

Chance of precipitation in January

Any precipitationSnow

Komae gets around 69 mm of rain and snow over 7.5 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 25% and peaks near 28% on the wettest days, and about 3 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1193
2194
3194
4204
5204
6205
7215
8216
9226
10237
11247
12248
13258
14269
15269
162710
172710
182710
192811
202811
212811
222811
232811
242810
252710
262710
272710
282610
29269
30269
31259

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 36 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 36 minutes over January. Sunrise moves from 6:56 AM to 6:49 AM, and sunset from 4:34 PM to 5:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:564:34
29.66:564:34
39.66:564:35
49.76:574:36
59.76:574:37
69.76:574:37
79.76:574:38
89.76:574:39
99.76:574:40
109.76:574:41
119.76:574:42
129.86:574:42
139.86:564:43
149.86:564:44
159.86:564:45
169.86:564:46
179.96:564:47
189.96:554:48
199.96:554:49
209.96:554:50
219.96:544:51
2210.06:544:52
2310.06:544:53
2410.06:534:54
2510.06:534:55
2610.16:524:56
2710.16:524:57
2810.16:514:58
2910.16:504:59
3010.26:505:00
3110.26:495:01

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.82 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.03 kWh/m² in May across the year — January's 2.82 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.9Moderate
242.9Moderate
252.9Moderate
263.0Moderate
273.0Moderate
283.0Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in January

Hazard calendar for Komae

In seasonPeak

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

Komae 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 Komae?

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

1.9
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 Komae.

What to pack for Komae in January

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

In January, Komae sees daytime highs around 9°C and nights near -0°C. Pack a warm layer. About 8 days see rain.

a warm layer

Sea temperature near Komae 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 27 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Komae 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 Komae peaks around July 20 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 20UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Komae 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 Komae is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Komae?

Komae sits at 35.6°N, 139.6°E, 28 m above sea level, in Japan. The nearest listed city is Noborito, 2.0 km away.

Topography around Komae

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

Within 3 km, the terrain around Komae has only modest variations in elevation — a maximum elevation change of 82 m around an average of 32 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 174 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,010 m.

The land around Komae is covered by artificial surfaces (79%) within 3 km, artificial surfaces (81%) within 16 km, and trees (40%) and artificial surfaces (26%) within 80 km.

3 km
82 m
16 km
174 m
80 km
3,010 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Noborito 2.0 km · Chōfu 4.0 km · Yōga 6.0 km · Setagaya 7.0 km · Inokashira 7.0 km · Inagi 7.0 km · Kamirenjaku 7.0 km · Eifuku 7.0 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 Komae (35.6342°, 139.5755°, elevation 28 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).