NaganoJapan · Asia · September

September climate

MountainCultureHiking

September in Nagano

Japan · Asia

Warm days and some sun. Heavier storm-season rain is the main drawback.

Some tradeoffs

Late

Daytime high

80°F

Lows around 65°F

Rain

Rain most days

Sun

5 h/day

Air feel

Humid

When to visit

Month-by-month fit

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Temperature

Warm by day, mild at night.

80°Ftypical September high

Typical range

Precipitation

It rains on most days. About 18 wet days this month.

60%wet-day frequency

Precip amountWet-day chanceSnowfall

Sunshine

Cloudier spells limit sunshine.

5.2 hSeptember sunshine

Heat & humidity by month

Warm days, with humid periods.

57%September Heat feel

Easy airWarm airHot airHumid airVery humid air

Hourly temperature pattern

In September, afternoons feel about 81° and nights feel near 70°.

FreezingVery coldColdCoolComfortableWarmHotNight hours

Clear sky

Mostly cloudy skies this month.

27%September Clear sky

Clear skyCloud

Wind pattern

Calm winds are typical in September.

3 mphSeptember Calm

More detailIncludes daypart comfort

Typical September day

September late afternoons are around 77°F, easing to about 71°F in early evening.

Avg temp Typical range

Morning74°F

Feels 77°F

Rain34%

Cloud68%

Humid airModerate

Sun intensityModerate

Midday79°F

Feels 82°F

Rain43%

Cloud70%

Humid airModerate

Sun intensityModerate

Late afternoon77°F

Feels 80°F

Rain42%

Cloud70%

Humid airHigh

Sun intensityLow

Early evening71°F

Feels 75°F

Rain28%

Cloud72%

Humid airHigh

Sun intensityMinimal

Best window

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