Japan · 1991–2020

Best time to visit
Asso.

May leads for comfortable weather in Asso: typically 22.7°C by day, 16.3°C at night, with 238 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high22.7°C

Typical low16.3°C

Rain in May238 mm

Comfort

May

May · November · October

58climate match

Beach

August

August · July · May

41climate match

Outdoors

November

November · December · January

63climate match

The weakest month is September, scoring 19 against May’s 58 — 374 mm of rain falls.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

2911.4° / 4.7°

Feb

2712.4° / 4.7°

Mar

2915.3° / 7.7°

Apr

4419.3° / 12°

May

5822.7° / 16.3°

Jun

2725° / 19.7°

Jul

2128.5° / 23.6°

Aug

2629.8° / 24.6°

Sep

1927.6° / 21.8°

Oct

4823.3° / 17.3°

Nov

5418.8° / 12.2°

Dec

4014° / 7.5°

Monthly climate evidence for Asso — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 9 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	11.4°C	4.7°C	90 mm	6.5	18.4°C	10 h 08	29	Good coverage
February	12.4°C	4.7°C	123 mm	7.6	17.3°C	10 h 55	27	Good coverage
March	15.3°C	7.7°C	192 mm	11.1	17.7°C	11 h 52	29	Strong coverage
April	19.3°C	12°C	232 mm	11.7	18.8°C	12 h 58	44	Strong coverage
May	22.7°C	16.3°C	238 mm	11.2	20.9°C	13 h 53	58	Good coverage
June	25°C	19.7°C	395 mm	15.5	23.3°C	14 h 23	27	Good coverage
July	28.5°C	23.6°C	323 mm	12.5	25.8°C	14 h 11	21	Good coverage
August	29.8°C	24.6°C	241 mm	12.2	27.6°C	13 h 24	26	Good coverage
September	27.6°C	21.8°C	374 mm	13.9	26.9°C	12 h 20	19	Good coverage
October	23.3°C	17.3°C	306 mm	11.6	25.0°C	11 h 17	48	Good coverage
November	18.8°C	12.2°C	165 mm	9	22.8°C	10 h 22	54	Good coverage
December	14°C	7.5°C	106 mm	7.2	20.4°C	9 h 55	40	Good coverage

Records at SHIONOMISAKI, 1953–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.6°C27 Jan 1969	-3.1°C22 Jan 1997	109 mm1 Jan 1973	292 mm1989 · driest 0 mm in 2026	71
February	23.4°C14 Feb 2009	-5.0°C26 Feb 1981	125 mm23 Feb 2012	280 mm1966 · driest 0 mm in 2026	71
March	23.9°C19 Mar 2013	-2.2°C5 Mar 1977	180 mm5 Mar 2012	371 mm2012 · driest 0 mm in 2026	71
April	26.1°C17 Apr 1956	2.5°C2 Apr 1972	234 mm5 Apr 1954	480 mm2010 · driest 0 mm in 2025	72
May	29.4°C31 May 1958	7.3°C2 May 1980	227 mm16 May 1963	678 mm1963 · driest 0 mm in 2025	70
June	30.8°C30 Jun 2007	14.2°C4 Jun 1972	252 mm25 Jun 1961	777 mm1954 · driest 0 mm in 2025	71
July	33.6°C29 Jul 2004	15.3°C3 Jul 1976	388 mm16 Jul 1998	746 mm1998 · driest 0 mm in 2025	70
August	34.4°C9 Aug 1956	18.3°C20 Aug 1956	290 mm21 Aug 2001	666 mm1966 · driest 0 mm in 2025	70
September	33.3°C9 Sep 1991	14.2°C30 Sep 1965	270 mm29 Sep 2018	860 mm2018 · driest 0 mm in 2025	68
October	29.7°C9 Oct 2025	8.7°C31 Oct 1986	406 mm27 Oct 1967	962 mm2017 · driest 0 mm in 2025	70
November	27.2°C2 Nov 2000	3.2°C26 Nov 1969	326 mm14 Nov 1972	541 mm1972 · driest 0 mm in 2025	69
December	23.3°C4 Dec 2018	-0.3°C27 Dec 1976	214 mm23 Dec 1972	313 mm1968 · driest 0 mm in 1988	69

Typical days per month at SHIONOMISAKI, 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	5
April	<1	0	0	6
May	4	0	0	6
June	15	0	0	8
July	28	8	0	6
August	30	15	0	6
September	25	3	0	7
October	8	0	0	6
November	<1	0	0	4
December	0	0	0	3

How often, not how much — every day in SHIONOMISAKI’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	24%	10%	24%	9.8–12.9°C
February	<1%	31%	13%	36%	10.1–14.0°C
March	2%	39%	19%	53%	13.7–16.0°C
April	23%	43%	23%	60%	18.0–20.1°C
May	55%	42%	23%	55%	21.4–23.1°C
June	50%	52%	30%	75%	23.9–25.5°C
July	59%	43%	21%	53%	26.9–29.3°C
August	58%	42%	21%	57%	28.6–30.6°C
September	53%	48%	25%	65%	25.8–28.6°C
October	55%	40%	21%	50%	22.0–23.9°C
November	20%	32%	16%	36%	17.4–19.6°C
December	<1%	24%	10%	21%	12.0–15.2°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1953Each stripe is one year’s mean temperature against the 49-year average. Warmest: 1998. Coolest: 1976.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1864968
NOAA station: JA000047778 · SHIONOMISAKI
Station distance: 41.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 33.70°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 9 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.

These places read the same station, so their numbers are identical — distance from SHIONOMISAKI is what differs

Tanabe→Shingū→Shirahama→Kushimoto→Katsuura→Udono→

Or put two places side by side: Asso vs Tanabe

Best time to visitAsso.

May

August

November

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Asso.

The whole year,
without the guesswork.

Nearby, measured,
and named.