Sagamihara weather in January

In January, Sagamihara sees average daytime highs of 8°C and overnight lows near -0°C, with 82 mm of precipitation across 8.5 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 11th-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 52% 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 Sagamihara's 1st-clearest and 9th-windiest month. For the whole year in context, see Sagamihara's year-round climate.

Daytime high
12th warmest
Overnight low
-0°
1st coldest
Precipitation
82 mm
8.5 wet days
Daylight
9 h 48 min
6:57 AM – 4:48 PM
Cloud cover
43%
1st clearest
Wind
7 km/h
9th windiest
Solar energy
2.78 kWh/m²
Travel score
1.5
out of 10
Air quality
Good
PM2.5 10 µg/m³ · 2010

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 Sagamihara 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 5°C and 11°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
191
291
391
490
590
690
790
880
980
1080
1180
1280
1380
1480
1580
1680
1780
1880
1980
2080
2180
228-1
238-1
248-1
258-1
268-1
278-1
288-1
298-1
308-1
318-1

How January really feels in Sagamihara

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.

Sagamihara 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 daysSnow daysDaylight (hours)Travel score
Jan / -0°828.53.39.91.5
Feb / 8410.13.510.71.7
Mar12° / 15415.42.311.72.8
Apr17° / 14714.40.312.94.7
May21° / 13°15813.6013.85.8
Jun24° / 18°20316.4014.45.4
Jul28° / 22°20517.4014.25.0
Aug29° / 23°16116.3013.34.8
Sep25° / 19°22916.1012.25.6
Oct20° / 14°23114.6011.15.6
Nov15° / 11011.7010.14.5
Dec11° / 768.80.59.62.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of January, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37525
47525
57525
67426
77327
87327
97129
107030
116931
126832
136733
146535
156436
166436
176238
186238
196238
206139
216139
226238
236238
246238
256238
266337
276436
286535
296535
306535
316634

Chance of precipitation in January

Any precipitationSnow

Sagamihara gets around 82 mm of rain and snow over 8.5 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 28% and peaks near 30% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1224
2235
3235
4246
5246
6247
7257
8258
9268
10279
11279
122810
132911
142911
153012
163012
173013
183013
193013
203013
213014
223014
233014
243014
253013
262913
272913
282913
292913
302913
312913

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 7 km/h in January.

Across January, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 6:57 AM to 6:50 AM, and sunset from 4:35 PM to 5:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:574:35
29.66:574:36
39.76:584:37
49.76:584:37
59.76:584:38
69.76:584:39
79.76:584:40
89.76:584:41
99.76:584:41
109.76:584:42
119.86:584:43
129.86:584:44
139.86:584:45
149.86:574:46
159.86:574:47
169.86:574:48
179.96:574:48
189.96:574:49
199.96:564:50
209.96:564:51
219.96:564:52
2210.06:554:53
2310.06:554:54
2410.06:544:55
2510.06:544:56
2610.16:534:57
2710.16:534:58
2810.16:524:59
2910.16:525:00
3010.26:515:01
3110.26:505:02

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.78 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.09 kWh/m² in May across the year — January's 2.78 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.9Moderate
252.9Moderate
262.9Moderate
273.0Moderate
283.0Moderate
293.0Moderate
303.0Moderate
313.1Moderate
Planning a trip in January

Hazard calendar for Sagamihara

In seasonPeak

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

Sagamihara 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 Sagamihara?

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

1.5
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Sagamihara.

What to pack for Sagamihara in January

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

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

a warm layerrain gear

Sea temperature near Sagamihara 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 at the nearest coast (about 50 km away) 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 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Sagamihara 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 Sagamihara peaks around July 16 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 16UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Sagamihara 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 Sagamihara is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Sagamihara's WHO annual average of 10 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1515 µg/m³Dec 167 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb15Moderate
Mar13Moderate
Apr15Moderate
May13Moderate
Jun10Good
Jul8Good
Aug7Good
Sep7Good
Oct8Good
Nov8Good
Dec7Good
Location & terrain

Where is Sagamihara?

Sagamihara sits at 35.6°N, 139.2°E, 237 m above sea level, in Japan. The nearest listed city is Aihara, 8.0 km away.

Topography around Sagamihara

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

Within 3 km, the terrain around Sagamihara has significant variations in elevation — a maximum elevation change of 465 m around an average of 278 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,642 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Sagamihara is covered by trees (76%) within 3 km, trees (72%) and artificial surfaces (22%) within 16 km, and trees (47%), artificial surfaces (24%) and water (21%) within 80 km.

3 km
465 m
16 km
1,642 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Aihara 8.0 km · Minawa 9.0 km · Hachiōji 12 km · Uenohara 13 km · Zama 16 km · Bunkyo 17 km · Itsukaichi 18 km · Akiruno 18 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 Sagamihara (35.5671°, 139.2417°, elevation 237 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).