Katagami weather in December

In December, Katagami sees average daytime highs of 6°C and overnight lows near 2°C, with 135 mm of precipitation across 21.4 wet days and about 9.2 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 8°C in the first days to 4°C by the end. The sky is clear or mostly clear about 6% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Katagami's 11th-clearest and 1st-windiest month. For the whole year in context, see Katagami's year-round climate.

Daytime high
10th warmest
Overnight low
4th coldest
Precipitation
135 mm
21.4 wet days
Daylight
9 h 12 min
7:01 AM – 4:12 PM
Cloud cover
74%
11th clearest
Wind
19 km/h
1st windiest
Solar energy
1.59 kWh/m²
Travel score
0.4
out of 10

Katagami is city in Akita Prefecture, Japan.

Density
325/km²
people per km²
Founded
2005

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 8°C in the first days to 4°C by the end.

A typical December day in Katagami reaches about 6°C in the afternoon and slips back to 2°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 10°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
184
284
384
483
583
673
773
873
973
1072
1162
1262
1362
1462
1562
1662
1762
1861
1951
2051
2151
2251
2351
2451
2551
2651
2751
2841
2940
3040
3140

How December really feels in Katagami

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

Katagami weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°9619.118.59.50.0
Feb / -1°8116.214.210.40.0
Mar / 9715.97.611.70.8
Apr13° / 9713.20.5133.2
May18° / 12°11212.6014.25.3
Jun22° / 17°11311.3014.86.2
Jul26° / 21°19114.8014.55.8
Aug27° / 23°19314.9013.65.7
Sep24° / 19°16813.9012.36.0
Oct18° / 12°15114.3010.95.2
Nov12° / 14217.91.69.82.5
Dec / 13521.411.29.20.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12872
22872
32773
42773
52872
62872
72773
82773
92773
102674
112773
122674
132674
142674
152674
162773
172773
182773
192773
202773
212773
222773
232872
242872
252872
262773
272773
282773
292773
302872
312872

Chance of precipitation in December

Any precipitationSnow

Katagami gets around 135 mm of rain and snow over 21.4 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 69% and peaks near 72% on the wettest days, and about 11 days bring snow.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
16418
26419
36521
46622
56724
66826
76828
86929
97031
107133
117134
127235
137236
147237
157237
167238
177238
187139
197139
207140
217040
227041
236941
246942
256942
266943
276944
286845
296847
306848
316749

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 19 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 18 km/h on the calmest days to 20 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
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze
3120light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 6:48 AM to 7:07 AM, and sunset from 4:11 PM to 4:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.46:484:11
29.46:494:11
39.36:504:11
49.36:514:11
59.36:524:11
69.36:534:11
79.36:544:10
89.36:554:11
99.36:554:11
109.26:564:11
119.26:574:11
129.26:584:11
139.26:594:11
149.26:594:11
159.27:004:11
169.27:014:12
179.27:014:12
189.27:024:12
199.27:024:13
209.27:034:13
219.27:034:14
229.27:044:14
239.27:044:15
249.27:054:15
259.27:054:16
269.27:064:16
279.27:064:17
289.27:064:17
299.27:064:18
309.27:074:19
319.27:074:19

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.59 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 5.62 kWh/m² in June across the year — December's 1.59 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.7Dim
261.7Dim
271.7Dim
281.7Dim
291.7Dim
301.7Dim
311.8Dim
Planning a trip in December

Hazard calendar for Katagami

In seasonPeak

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

Katagami 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 December a good time to visit Katagami?

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

0.4
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Katagami.

What to pack for Katagami in December

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

In December, Katagami sees daytime highs around 6°C and nights near 2°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 21 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Katagami in December

The nearest coast averages about 14°C in December — 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 25°C and coldest in March near 9°C.

It's comfortable for a long swim from Jun 30 to Oct 23 — about 3.8 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb9Bracing
Mar9Bracing
Apr10Bracing
May14Bracing
Jun18Cool
Jul22Refreshing
Aug25Warm
Sep24Warm
Oct21Refreshing
Nov17Cool
Dec14Bracing

UV index in Katagami in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Katagami peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May8Very high
Jun7Very high
Jul5Moderate
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Katagami 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 Katagami is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun15Moderate
Jul13Moderate
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Katagami?

Katagami sits at 39.9°N, 140.0°E, 10 m above sea level, in Japan. The nearest listed city is Tennō, 4.0 km away.

Topography around Katagami

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

Within 3 km, the terrain around Katagami has only modest variations in elevation — a maximum elevation change of 28 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 477 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,621 m.

The land around Katagami is covered by cropland (40%), trees (22%) and water (20%) within 3 km, water (36%), trees (31%) and cropland (25%) within 16 km, and trees (52%) and water (38%) within 80 km.

3 km
28 m
16 km
477 m
80 km
1,621 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Tennō 4.0 km · Oga 13 km · Akita 21 km · Moritake 25 km · Noshiro 37 km · Kita-Akita 49 km · Takanosu 49 km · Yurihonjō 55 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 Katagami (39.8787°, 139.9977°, 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).