Midori weather in December

In December, Midori sees average daytime highs of 8°C and overnight lows near 0°C, with 45 mm of precipitation across 7 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 10°C in the first days to 6°C by the end. The sky is clear or mostly clear about 47% 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 Midori's 1st-clearest and 4th-windiest month. For the whole year in context, see Midori's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
45 mm
7 wet days
Daylight
9 h 30 min
6:53 AM – 4:25 PM
Cloud cover
46%
1st clearest
Wind
7 km/h
4th windiest
Solar energy
2.33 kWh/m²
Travel score
1.3
out of 10

Midori is city in Gunma Prefecture, Japan.

Density
241/km²
people per km²
Founded
2006

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 10°C in the first days to 6°C by the end.

A typical December day in Midori reaches about 8°C in the afternoon and slips back to 0°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 12°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1102
2102
3102
4102
592
692
792
891
991
1081
1181
1281
1381
1480
1580
1680
1770
1870
1970
2070
2170
2270
237-1
247-1
256-1
266-1
276-1
286-1
296-1
306-1
316-1

How December really feels in Midori

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 27 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
27
wind chill below the day's low

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

Midori 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 / -2°517.25.59.80.1
Feb / -2°518.35.910.60.4
Mar10° / 9912.45.411.72.0
Apr15° / 11412.71.312.94.4
May20° / 11°13614.3013.95.6
Jun23° / 16°17318.4014.45.1
Jul27° / 20°21721.3014.24.7
Aug28° / 21°17420.2013.44.7
Sep24° / 17°20417.2012.25.4
Oct18° / 11°16813.4011.15.4
Nov13° / 667.80.310.13.9
Dec / 4573.39.61.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 29%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36733
46733
56832
66931
76931
87030
97030
107030
117129
127030
137030
147129
157129
167129
177129
187129
197129
207129
217228
227228
237228
247228
257327
267327
277426
287426
297525
307525
317525

Chance of precipitation in December

Any precipitationSnow

Midori gets around 45 mm of rain and snow over 7 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 22% and peaks near 25% on the wettest days, and about 3 days bring snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1254
2254
3255
4255
5245
6246
7246
8247
9237
10237
11238
12238
13239
14239
15229
162210
172210
182211
192211
202212
212213
222213
232114
242114
252014
262015
271915
281915
291815
301815
311816

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 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
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 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 6:42 AM to 7:00 AM, and sunset from 4:23 PM to 4:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:424:23
29.76:434:23
39.76:444:23
49.66:444:23
59.66:454:23
69.66:464:23
79.66:474:23
89.66:484:23
99.66:484:23
109.66:494:23
119.66:504:24
129.66:514:24
139.56:514:24
149.56:524:24
159.56:534:24
169.56:534:25
179.56:544:25
189.56:544:25
199.56:554:26
209.56:564:26
219.56:564:27
229.56:574:27
239.56:574:28
249.56:574:28
259.56:584:29
269.56:584:29
279.56:594:30
289.56:594:30
299.56:594:31
309.56:594:32
319.57:004:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.33 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.29 kWh/m² in May across the year — December's 2.33 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
162.3Moderate
172.3Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in December

Hazard calendar for Midori

In seasonPeak

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

Midori'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 Midori?

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

1.3
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 Midori.

What to pack for Midori in December

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

In December, Midori sees daytime highs around 8°C and nights near 0°C. Pack a warm layer. Worth having: a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Midori 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 Midori peaks around July 16 at about 9 (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 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Midori 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 Midori 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 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Midori?

Midori sits at 36.4°N, 139.3°E, 254 m above sea level, in Japan. The nearest listed city is Ōmamachō-ōmama, 2.0 km away.

Topography around Midori

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

Within 3 km, the terrain around Midori has significant variations in elevation — a maximum elevation change of 351 m around an average of 243 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,777 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,552 m.

The land around Midori is covered by trees (62%) and artificial surfaces (28%) within 3 km, trees (61%) and artificial surfaces (21%) within 16 km, and trees (67%) within 80 km.

3 km
351 m
16 km
1,777 m
80 km
2,552 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ōmamachō-ōmama 2.0 km · Kiryū 7.0 km · Isesaki 16 km · Ōta 18 km · Maebashi 19 km · Ashikaga 19 km · Sakai-nakajima 20 km · Tamamura 22 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 Midori (36.4449°, 139.2845°, elevation 254 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).