Ogawamachi weather in December

In December, Ogawamachi sees average daytime highs of 10°C and overnight lows near 2°C, with 54 mm of precipitation across 7.2 wet days and about 9.6 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 8°C by the end. The sky is clear or mostly clear about 59% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 36 min by month's end. Set against the rest of the year, December is Ogawamachi's 2nd-clearest and 5th-windiest month. For the whole year in context, see Ogawamachi's year-round climate.

Daytime high
10°
10th warmest
Overnight low
3rd coldest
Precipitation
54 mm
7.2 wet days
Daylight
9 h 36 min
6:52 AM – 4:26 PM
Cloud cover
39%
2nd clearest
Wind
7 km/h
5th windiest
Solar energy
2.44 kWh/m²
Travel score
2.5
out of 10

Ogawamachi is town in Hiki district, Saitama prefecture, Japan.

Density
480/km²
people per km²
Founded
1889

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 12°C in the first days to 8°C by the end.

A typical December day in Ogawamachi reaches about 10°C in the afternoon and slips back to 2°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 13°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1124
2124
3124
4113
5113
6113
7113
8113
9113
10102
11102
12102
13102
14102
15102
16101
17101
1891
1991
2091
2191
2291
2391
2491
2590
2690
2790
2890
2980
3080
3180

How December really feels in Ogawamachi

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 19 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
19
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Ogawamachi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°626.73.79.81.2
Feb / -1°597.64.110.61.6
Mar12° / 111134.511.72.9
Apr17° / 12312.80.912.95.0
May22° / 13°14814.4013.95.8
Jun24° / 18°19918.1014.45.2
Jul28° / 22°22220.8014.24.4
Aug29° / 23°18019.7013.44.2
Sep25° / 19°22317.3012.25.4
Oct20° / 13°21714.5011.15.6
Nov15° / 819.20.210.14.6
Dec10° / 547.21.39.62.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26436
36436
46535
56634
66733
76733
86832
96931
107030
117129
127129
137228
147228
157228
167327
177327
187426
197426
207525
217525
227525
237624
247624
257723
267723
277723
287822
297822
307921
317921

Chance of precipitation in December

Any precipitationSnow

Ogawamachi gets around 54 mm of rain and snow over 7.2 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 23% and peaks near 30% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1302
2302
3302
4302
5292
6293
7283
8283
9273
10263
11263
12253
13254
14244
15244
16234
17224
18225
19215
20205
21205
22195
23195
24185
25185
26176
27176
28166
29166
30166
31166

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December 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 December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:41 AM to 6:59 AM, and sunset from 4:25 PM to 4:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:414:25
29.76:424:24
39.76:434:24
49.76:434:24
59.76:444:24
69.76:454:24
79.66:464:24
89.66:474:24
99.66:474:24
109.66:484:25
119.66:494:25
129.66:504:25
139.66:504:25
149.66:514:25
159.66:524:26
169.66:524:26
179.66:534:26
189.66:534:27
199.66:544:27
209.56:554:27
219.56:554:28
229.56:564:28
239.56:564:29
249.56:564:29
259.66:574:30
269.66:574:30
279.66:584:31
289.66:584:32
299.66:584:32
309.66:584:33
319.66:594:34

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.44 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.08 kWh/m² in May across the year — December's 2.44 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
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in December

Hazard calendar for Ogawamachi

In seasonPeak

None of Ogawamachi's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ogawamachi's rainy season runs March–October, when most of the year's rain falls.

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

Is December a good time to visit Ogawamachi?

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

2.5
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Ogawamachi.

What to pack for Ogawamachi in December

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

In December, Ogawamachi sees daytime highs around 10°C and nights near 2°C. Pack a warm layer. About 7 days see rain.

a warm layer

UV index in Ogawamachi in December

LowModerateHighVery highExtreme

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

Under clear skies, the midday UV index in Ogawamachi peaks around July 15 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 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ogawamachi in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ogawamachi 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 Ogawamachi?

Ogawamachi sits at 36.1°N, 139.3°E, 90 m above sea level, in Japan. The nearest listed city is Ranzan, 4.0 km away.

Topography around Ogawamachi

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

Within 3 km, the terrain around Ogawamachi has only modest variations in elevation — a maximum elevation change of 244 m around an average of 134 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,671 m.

The land around Ogawamachi is covered by trees (70%) within 3 km, trees (59%) and artificial surfaces (23%) within 16 km, and trees (56%) and artificial surfaces (26%) within 80 km.

3 km
244 m
16 km
948 m
80 km
2,671 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ranzan 4.0 km · Yorii 9.0 km · Yamata 10 km · Morohongō 14 km · Higashi-Matsuyama 14 km · Kumagaya 14 km · Sakado 15 km · Tsurugashima 16 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 Ogawamachi (36.0534°, 139.2661°, elevation 90 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. 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).