Hitachi weather in December

In December, Hitachi sees average daytime highs of 11°C and overnight lows near 7°C, with 72 mm of precipitation across 8.7 wet days and about 9.5 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 9°C by the end. The sky is clear or mostly clear about 55% 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 30 min by month's end. Set against the rest of the year, December is Hitachi's 1st-clearest and 4th-windiest month. For the whole year in context, see Hitachi's year-round climate.

Daytime high
11°
9th warmest
Overnight low
4th coldest
Precipitation
72 mm
8.7 wet days
Daylight
9 h 30 min
6:48 AM – 4:19 PM
Cloud cover
42%
1st clearest
Wind
17 km/h
4th windiest
Solar energy
2.34 kWh/m²
Travel score
2.8
out of 10

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 9°C by the end.

A typical December day in Hitachi reaches about 11°C in the afternoon and slips back to 7°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 14°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1139
2139
3129
4129
5129
6128
7128
8128
9118
10118
11118
12117
13117
14117
15117
16107
17107
18107
19107
20107
21106
22106
23106
24106
25106
2696
2796
2896
2996
3096
3195

How December really feels in Hitachi

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hitachi weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 738.21.29.81.5
Feb / 718.31.810.61.4
Mar10° / 12712.70.911.72.3
Apr14° / 10°125120.212.93.9
May18° / 15°14412.5013.95.3
Jun21° / 18°14814.3014.55.4
Jul24° / 22°16214.1014.26.0
Aug26° / 23°11111.4013.46.4
Sep24° / 21°17414.1012.26.0
Oct19° / 17°21113.2011.15.8
Nov15° / 12°10810.10104.7
Dec11° / 728.70.29.52.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36238
46238
56337
66337
76436
86436
96634
106733
116733
126832
136832
146931
156931
167030
177129
187228
197228
207228
217327
227426
237426
247525
257525
267624
277624
287624
297723
307723
317723

Chance of precipitation in December

Any precipitation

Hitachi gets around 72 mm of rain and snow over 8.7 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 27% and peaks near 34% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
134
233
333
433
532
632
732
831
930
1030
1129
1228
1328
1427
1527
1626
1726
1825
1925
2025
2124
2224
2324
2424
2524
2623
2723
2823
2923
3023
3123

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 (%)Comfortable (%)
1982
2982
3982
4991
5991
6991
7991
8991
9991
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 30 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 6:37 AM to 6:55 AM, and sunset from 4:18 PM to 4:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:374:18
29.76:384:17
39.66:384:17
49.66:394:17
59.66:404:17
69.66:414:17
79.66:424:17
89.66:434:17
99.66:434:17
109.66:444:18
119.56:454:18
129.56:464:18
139.56:464:18
149.56:474:18
159.56:484:19
169.56:484:19
179.56:494:19
189.56:494:20
199.56:504:20
209.56:514:20
219.56:514:21
229.56:524:21
239.56:524:22
249.56:524:22
259.56:534:23
269.56:534:23
279.56:544:24
289.56:544:25
299.56:544:25
309.56:544:26
319.56:554:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.34 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.45 kWh/m² in May across the year — December's 2.34 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.4Moderate
172.4Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.4Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Hitachi

In seasonPeak

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

Hitachi 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 Hitachi?

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

2.8
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Hitachi.

What to pack for Hitachi in December

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

In December, Hitachi sees daytime highs around 11°C and nights near 7°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Hitachi in December

The nearest coast averages about 16°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 28 to Oct 25 — about 3.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Hitachi 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 Hitachi peaks around August 12 at about 10 (extreme) — 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 highVery highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Hitachi 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 Hitachi is worst in April — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 2219 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar17Moderate
Apr19Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep10Good
Oct10Good
Nov9Good
Dec7Good
Location & terrain

Where is Hitachi?

Hitachi sits at 36.6°N, 140.7°E, 51 m above sea level, in Japan. The nearest listed city is Hitachi-ota, 12 km away.

Topography around Hitachi

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

Within 3 km, the terrain around Hitachi has significant variations in elevation — a maximum elevation change of 375 m around an average of 103 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 653 m; within 80 km, large variations in elevation — a maximum elevation change of 1,074 m.

The land around Hitachi is covered by trees (45%) and artificial surfaces (34%) within 3 km, water (43%) and trees (40%) within 16 km, and trees (46%) and water (30%) within 80 km.

3 km
375 m
16 km
653 m
80 km
1,074 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Hitachi-ota 12 km · Takahagi 14 km · Tokai 16 km · Funaishikawa 17 km · Ōmiya 22 km · Inada 22 km · Hitachiomiya 22 km · Kitaibaraki 23 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 Hitachi (36.6°, 140.65°, elevation 51 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).