Japan · 1991–2020

Best time to visit
Amakusa

For Amakusa, October has the most comfortable weather in our climate comparison. Typical daytime highs are 24.1°C, nights average 15.9°C, and rainfall totals about 136 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthOctober

Typical daytime high24.1°C

Typical night-time low15.9°C

October rainfall136 mm

Overall comfort

October

Other strong months: May and November

81/100 weather score

Beach weather

September

Other strong months: October and May

56/100 weather score

Outdoor sightseeing

November

Other strong months: April and October

77/100 weather score

Make the answer personal

Choose the weather
that suits you.

Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.

Daytime high: at least 18°CDaytime high: at most 28°CMonthly rain: no more than 140 mmWet days: no more than 10

2 months fit your choices for Amakusa

October24.1°C day · 136 mm rain · 5.9 wet days

November18.5°C day · 106 mm rain · 7.8 wet days

July has the lowest comfort score at 9 out of 100, compared with October at 81. The main reason is that 345 mm of rain falls.

Quick answers

Planning a trip to Amakusa?

These answers come from the same measured monthly climate record shown on this page.

When is the best time to visit Amakusa?

October is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 24.1°C and 136 mm of rain.

What is the hottest month in Amakusa?

August is hottest in this record, with a typical daytime high of 31.9°C and a night-time low of 25.2°C.

Which month has the least rain?

January has the lowest monthly rainfall total at 73 mm.

Is this a weather forecast?

No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.

Month by month

See how the weather
changes through the year.

The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.

2310.5° / 3.4°

2612° / 3.5°

3615.3° / 6.7°

5719.8° / 11.2°

6923.8° / 15.6°

2026.4° / 19.8°

930.4° / 24.2°

1531.9° / 25.2°

3928.9° / 21.6°

8124.1° / 15.9°

5918.5° / 10.2°

3313.2° / 5.5°

Monthly climate evidence for Amakusa — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 20 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	10.5°C	3.4°C	73 mm	10.4	16.0°C	10 h 14	23	Good coverage
February	12°C	3.5°C	94 mm	9	14.8°C	10 h 59	26	Good coverage
March	15.3°C	6.7°C	129 mm	10.4	15.4°C	11 h 53	36	Good coverage
April	19.8°C	11.2°C	154 mm	9	16.9°C	12 h 56	57	Good coverage
May	23.8°C	15.6°C	191 mm	10.8	19.3°C	13 h 48	69	Good coverage
June	26.4°C	19.8°C	409 mm	15	22.2°C	14 h 16	20	Good coverage
July	30.4°C	24.2°C	345 mm	13.8	25.3°C	14 h 05	9	Good coverage
August	31.9°C	25.2°C	269 mm	11.3	27.4°C	13 h 20	15	Good coverage
September	28.9°C	21.6°C	225 mm	10.7	26.4°C	12 h 20	39	Good coverage
October	24.1°C	15.9°C	136 mm	5.9	23.7°C	11 h 19	81	Good coverage
November	18.5°C	10.2°C	106 mm	7.8	20.8°C	10 h 27	59	Good coverage
December	13.2°C	5.5°C	93 mm	10.2	18.1°C	10 h 02	33	Good coverage

Records at NAGASAKI, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.5°C29 Jan 2017	-4.4°C25 Jan 2016	82 mm14 Jan 2023	237 mm1972 · driest 0 mm in 2026	75
February	22.6°C24 Feb 2010	-4.3°C16 Feb 1977	100 mm23 Feb 1979	192 mm1989 · driest 0 mm in 2026	75
March	24.4°C18 Mar 1952	-3.6°C5 Mar 1977	238 mm24 Mar 2024	327 mm2024 · driest 0 mm in 2026	75
April	29.0°C29 Apr 1998	1.2°C2 Apr 1972	144 mm22 Apr 1958	383 mm1958 · driest 0 mm in 2025	75
May	31.4°C23 May 1998	4.0°C1 May 2026	196 mm8 May 1973	400 mm1953 · driest 0 mm in 2025	75
June	36.4°C20 Jun 2004	12.0°C10 Jun 1951	245 mm30 Jun 1981	772 mm2011 · driest 0 mm in 2025	75
July	37.7°C23 Jul 1994	14.9°C8 Jul 2026	448 mm23 Jul 1982	1179 mm1982 · driest 0 mm in 2025	75
August	37.6°C17 Aug 1964	18.8°C19 Aug 1956	252 mm16 Aug 1956	940 mm2021 · driest 0 mm in 2025	74
September	36.1°C12 Sep 1961	11.7°C29 Sep 1965	243 mm25 Sep 1954	507 mm1999 · driest 0 mm in 2025	74
October	33.7°C3 Oct 1961	4.9°C31 Oct 1970	181 mm8 Oct 1981	279 mm2017 · driest 0 mm in 2025	74
November	26.3°C3 Nov 2011	0.9°C30 Nov 1970	144 mm19 Nov 2011	214 mm2011 · driest 0 mm in 2025	74
December	23.4°C4 Dec 2018	-2.6°C30 Dec 1960	85 mm5 Dec 2004	155 mm2014 · driest 0 mm in 2025	74

Typical days per month at NAGASAKI, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	1	2
February	0	0	1	3
March	0	0	0	4
April	1	0	0	4
May	10	<1	0	4
June	21	2	0	7
July	29	18	0	6
August	30	24	0	4
September	27	11	0	4
October	12	<1	0	3
November	<1	0	0	3
December	0	0	<1	2

How often different weather occurs at NAGASAKI, based on its daily record
Month	Dry days reaching 20°C	Wet days	Days with heavy rain	Weeks with 3+ wet days	Typical high by year
January	<1%	35%	7%	40%	8.6–11.7°C
February	<1%	34%	11%	41%	9.0–13.5°C
March	5%	36%	15%	42%	13.0–16.2°C
April	31%	38%	20%	47%	18.4–20.8°C
May	58%	37%	19%	44%	22.4–24.3°C
June	54%	47%	26%	64%	24.8–27.3°C
July	61%	39%	21%	44%	28.4–31.5°C
August	68%	33%	17%	41%	30.2–32.8°C
September	65%	35%	19%	40%	26.7–29.8°C
October	71%	22%	10%	17%	22.4–25.0°C
November	23%	28%	10%	30%	16.7–20.0°C
December	<1%	31%	7%	35%	11.1–14.5°C

A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.

1951Each stripe is one year’s mean temperature against the 42-year average. Warmest: 2025. Coolest: 1951.2025

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 7424125
NOAA station: JA000047817 · NAGASAKI
Station distance: 43.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 32.46°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 20 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

Next step

Choose your month.
Then plan the details.

The weather comparison for Amakusa is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.

How travel partnerships will work

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