NaganoJapan · Asia · December

December climate

MountainCultureHiking

December in Nagano

Japan · Asia

Not the best time: Cold conditions during longer outdoor plans and some snow or mixed precipitation are the main limitations.

Not an ideal month

Late

Daytime high

45°F

Lows around 32°F

Precipitation

21 days/mo

Sun

4.5 h/day

Air feel

Very dry

When to visit

Month-by-month fit

Best

Switch month

Temperature

Cold by day, freezing at night.

45°Ftypical December high

Typical range

Precipitation

Some snow or mixed precipitation is possible this month.

68%wet-day frequency

Precip amountWet-day chanceSnowfall

Sunshine

Wintry precipitation and cloud limit sunshine.

4.3 hDecember sunshine

Heat & humidity by month

Humidity is rarely noticeable in the cool air.

Very dryDecember Heat feel

Easy airWarm airHot airHumid airVery humid air

Hourly temperature pattern

In December, afternoons feel about 38° and nights feel near 28°.

FreezingVery coldColdCoolComfortableWarmHotNight hours

Clear sky

Mostly cloudy skies this month.

33%December Clear sky

Clear skyCloud

Wind pattern

Calm winds are typical in December.

3 mphDecember Calm

More detailIncludes daypart comfort

Typical December day

December late afternoons are around 42°F, easing to about 38°F in early evening.

Avg temp Typical range

Morning39°F

Rain45%

Cloud64%

Humid airLow

Sun intensityLow

Midday44°F

Rain44%

Cloud66%

Humid airLow

Sun intensityModerate

Best window

Late afternoon42°F

Rain47%

Cloud65%

Humid airLow

Sun intensityMinimal

Early evening37°F

Rain46%

Cloud67%

Humid airLow

Sun intensityMinimal

Data table

View month-by-month numbers

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Similar climates

Want a side-by-side climate view? Compare Nagano with Kitzbühel.

Climate data notePlanning guidance, not a forecast

Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.

Sunshine: reviewed station-normal observations.

Local microclimates can vary by beach, neighborhood, trail, or elevation.

Last updated: Jun 1, 2026

Data & methodology

Month

High°F

Low°F

Rainin

Wet days

Sunh

Humidity%

Jan

5.8

4.2

Feb

4.8

4.9

Mar

5.4

5.7

Apr

4.8

6.7

May

5.6

7.0

Jun

7.0

5.8

Jul

9.4

5.7

Aug

7.2

6.5

Sep

7.3

5.2

Oct

6.2

5.0

Nov

4.8

Dec

5.6

4.3

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%
Jan	40	27	5.8	23	4.2	76
Feb	42	29	4.8	18	4.9	74
Mar	49	35	5.4	18	5.7	71
Apr	62	44	4.8	15	6.7	69
May	73	55	5.6	15	7.0	70
Jun	79	64	7.0	19	5.8	76
Jul	85	71	9.4	23	5.7	81
Aug	87	72	7.2	20	6.5	79
Sep	80	65	7.3	18	5.2	81
Oct	68	53	6.2	15	5.0	80
Nov	57	42	4.8	17	4.8	79
Dec	45	32	5.6	21	4.3	77