Japan · 1991–2020

Best time to visit
Ōyama.

May leads for comfortable weather in Ōyama: typically 22°C by day, 15.2°C at night, with 215 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high22°C

Typical low15.2°C

Rain in May215 mm

Comfort

May

May · November · June

62climate match

Beach

August

August · September · July

62climate match

Outdoors

November

November · December · April

68climate match

The weakest month is February, scoring 22 against May’s 62 — days reach only 11.5°C, 12° below the 24°C the score treats as ideal.

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

2710.7° / 2.7°

Feb

2211.5° / 2.8°

Mar

2914.4° / 6°

Apr

4218.5° / 10.7°

May

6222° / 15.2°

Jun

5324.5° / 19°

Jul

3028° / 22.8°

Aug

4329.8° / 24.2°

Sep

4327.4° / 21.5°

Oct

5223° / 16.6°

Nov

5418.2° / 11°

Dec

3813.2° / 5.4°

Monthly climate evidence for Ōyama — 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	10.7°C	2.7°C	64 mm	5.6	16.4°C	10 h 04	27	Good coverage
February	11.5°C	2.8°C	111 mm	7.6	15.7°C	10 h 53	22	Good coverage
March	14.4°C	6°C	158 mm	10	16.0°C	11 h 52	29	Good coverage
April	18.5°C	10.7°C	219 mm	10.3	17.4°C	13 h 00	42	Good coverage
May	22°C	15.2°C	215 mm	9.7	19.3°C	13 h 57	62	Good coverage
June	24.5°C	19°C	250 mm	11.7	21.8°C	14 h 28	53	Good coverage
July	28°C	22.8°C	285 mm	11.5	24.6°C	14 h 16	30	Good coverage
August	29.8°C	24.2°C	154 mm	8.7	26.6°C	13 h 27	43	Good coverage
September	27.4°C	21.5°C	226 mm	11.5	25.7°C	12 h 21	43	Good coverage
October	23°C	16.6°C	287 mm	10	23.5°C	11 h 15	52	Good coverage
November	18.2°C	11°C	144 mm	8	21.1°C	10 h 18	54	Good coverage
December	13.2°C	5.4°C	83 mm	5.5	18.6°C	9 h 51	38	Good coverage

Records at OMAEZAKI, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.8°C27 Jan 1969	-5.0°C24 Jan 1963	145 mm31 Jan 2009	195 mm2009 · driest 0 mm in 2026	76
February	22.8°C14 Feb 2009	-5.2°C27 Feb 1981	143 mm17 Feb 1989	290 mm1989 · driest 0 mm in 2026	76
March	22.9°C19 Mar 2013	-3.0°C6 Mar 1977	113 mm31 Mar 2004	283 mm1968 · driest 0 mm in 2026	76
April	25.5°C23 Apr 1964	0.4°C2 Apr 1972	209 mm23 Apr 2012	383 mm2012 · driest 0 mm in 2025	76
May	27.6°C31 May 1967	7.2°C2 May 1980	217 mm31 May 2003	467 mm1963 · driest 0 mm in 2025	76
June	31.6°C30 Jun 2007	11.3°C8 Jun 1969	205 mm28 Jun 1966	517 mm1954 · driest 0 mm in 2025	76
July	36.7°C20 Jul 2004	16.0°C3 Jul 1976	260 mm9 Jul 2022	602 mm1993 · driest 0 mm in 2025	76
August	36.4°C3 Aug 1994	18.5°C27 Aug 1968	230 mm15 Aug 2003	675 mm2024 · driest 0 mm in 2025	75
September	33.0°C3 Sep 2000	11.8°C30 Sep 1965	275 mm27 Sep 1974	693 mm1982 · driest 0 mm in 2025	75
October	29.9°C13 Oct 2025	6.4°C31 Oct 1986	287 mm12 Oct 2019	977 mm2004 · driest 0 mm in 2025	75
November	26.1°C2 Nov 2000	0.7°C30 Nov 1970	162 mm17 Nov 1977	309 mm2003 · driest 0 mm in 2025	75
December	22.4°C11 Dec 2015	-3.2°C25 Dec 1973	91 mm2 Dec 1959	258 mm1968 · driest 0 mm in 2025	75

Typical days per month at OMAEZAKI, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	3	2
February	0	0	3	3
March	0	0	<1	4
April	0	0	0	5
May	2	0	0	5
June	11	<1	0	6
July	26	7	0	5
August	29	16	0	3
September	24	3	0	5
October	6	0	0	5
November	0	0	0	3
December	0	0	<1	2

How often, not how much — every day in OMAEZAKI’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%	21%	9%	17%	9.0–11.8°C
February	0%	26%	12%	28%	9.5–13.0°C
March	<1%	35%	18%	42%	12.8–15.2°C
April	15%	39%	21%	50%	17.0–19.2°C
May	57%	36%	20%	42%	20.6–22.6°C
June	58%	43%	24%	58%	23.3–25.1°C
July	66%	35%	18%	37%	26.2–29.3°C
August	70%	31%	16%	37%	28.3–30.5°C
September	60%	40%	20%	50%	25.5–28.3°C
October	57%	35%	19%	41%	21.6–23.6°C
November	17%	28%	14%	28%	16.7–18.9°C
December	<1%	19%	9%	13%	11.3–14.3°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.

1951Each stripe is one year’s mean temperature against the 47-year average. Warmest: 2025. Coolest: 1965.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1853486
NOAA station: JA000047655 · OMAEZAKI
Station distance: 0.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 34.60°, 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 OMAEZAKI is what differs

Kakegawa→Shimada→Kikugawa→Maruobara→Omaezaki→Sumiyoshi→

Or put two places side by side: Ōyama vs Kakegawa

Best time to visitŌyama.

May

August

November

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Ōyama.

The whole year,
without the guesswork.

Nearby, measured,
and named.