Japan · 1991–2020

Best time to visit
Hiroshima

For Hiroshima, October has the most comfortable weather in our climate comparison. Typical daytime highs are 23.7°C, nights average 14.1°C, and rainfall totals about 139 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthOctober

Typical daytime high23.7°C

Typical night-time low14.1°C

October rainfall139 mm

Overall comfort

October

Other strong months: May and November

79/100 weather score

Beach weather

September

Other strong months: August and October

66/100 weather score

Outdoor sightseeing

November

Other strong months: April and October

79/100 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

1 month fits your choices for Hiroshima

October23.7°C day · 139 mm rain · 7.4 wet days

July has the lowest comfort score at 12 out of 100, compared with October at 79. The main reason is that 319 mm of rain falls.

Quick answers

Planning a trip to Hiroshima?

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

When is the best time to visit Hiroshima?

October is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 23.7°C and 139 mm of rain.

What is the hottest month in Hiroshima?

August is hottest in this record, with a typical daytime high of 32.8°C and a night-time low of 24.8°C.

Which month has the least rain?

January has the lowest monthly rainfall total at 54 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.

229.9° / 1.3°

2511.1° / 1.9°

3214.6° / 4.4°

5319.7° / 9.3°

7224.4° / 14.6°

3927.2° / 19.4°

1231.1° / 23.9°

3432.8° / 24.8°

4729.2° / 20.8°

7923.7° / 14.1°

5817.7° / 8.4°

3412.3° / 3.5°

Monthly climate evidence for Hiroshima — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 31 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	9.9°C	1.3°C	54 mm	8.2	14.5°C	10 h 05	22	Good coverage
February	11.1°C	1.9°C	70 mm	7	13.0°C	10 h 53	25	Good coverage
March	14.6°C	4.4°C	120 mm	9.5	13.1°C	11 h 52	32	Good coverage
April	19.7°C	9.3°C	159 mm	9.3	14.6°C	13 h	53	Good coverage
May	24.4°C	14.6°C	181 mm	8.8	17.0°C	13 h 56	72	Good coverage
June	27.2°C	19.4°C	280 mm	12.5	20.4°C	14 h 26	39	Good coverage
July	31.1°C	23.9°C	319 mm	13	24.2°C	14 h 15	12	Good coverage
August	32.8°C	24.8°C	142 mm	8	26.3°C	13 h 26	34	Good coverage
September	29.2°C	20.8°C	177 mm	9.9	25.2°C	12 h 21	47	Good coverage
October	23.7°C	14.1°C	139 mm	7.4	23.1°C	11 h 16	79	Good coverage
November	17.7°C	8.4°C	74 mm	6.7	20.2°C	10 h 19	58	Good coverage
December	12.3°C	3.5°C	65 mm	5.8	17.0°C	9 h 52	34	Good coverage

Records at HIROSHIMA, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.5°C27 Jan 1969	-8.5°C16 Jan 1963	53 mm31 Jan 1990	136 mm1990 · driest 0 mm in 2026	74
February	21.5°C14 Feb 2009	-7.5°C27 Feb 1981	56 mm28 Feb 1976	158 mm1989 · driest 0 mm in 2026	75
March	23.9°C25 Mar 2025	-5.5°C5 Mar 1977	62 mm17 Mar 1996	238 mm1966 · driest 0 mm in 2026	75
April	29.0°C22 Apr 2004	-0.9°C6 Apr 1965	127 mm7 Apr 1991	282 mm1967 · driest 0 mm in 2025	75
May	31.5°C22 May 1998	4.4°C1 May 1965	128 mm26 May 1965	400 mm1963 · driest 0 mm in 2025	75
June	33.6°C25 Jun 2011	9.9°C9 Jun 1957	187 mm20 Jun 1965	659 mm1985 · driest 0 mm in 2025	75
July	38.7°C17 Jul 1994	14.1°C4 Jul 1966	293 mm7 Jul 2018	762 mm2020 · driest 0 mm in 2025	74
August	37.5°C13 Aug 2019	15.3°C31 Aug 1968	180 mm14 Aug 2021	696 mm2021 · driest 0 mm in 1994	73
September	36.9°C6 Sep 2007	8.6°C29 Sep 1965	169 mm28 Sep 1983	445 mm1966 · driest 0 mm in 2025	72
October	31.4°C1 Oct 2019	3.2°C28 Oct 1958	159 mm14 Oct 1951	387 mm2017 · driest 0 mm in 2025	74
November	25.4°C2 Nov 1959	-0.6°C28 Nov 1960	141 mm2 Nov 2024	260 mm2024 · driest 0 mm in 2025	74
December	22.1°C3 Dec 1968	-4.4°C30 Dec 1980	84 mm5 Dec 2004	109 mm2004 · driest 0 mm in 2025	74

Typical days per month at HIROSHIMA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	5	1
February	0	0	4	2
March	0	0	<1	4
April	1	0	0	4
May	14	<1	0	5
June	23	4	0	5
July	28	20	0	5
August	29	26	0	3
September	26	13	0	4
October	11	<1	0	3
November	0	0	0	2
December	0	0	<1	2

How often different weather occurs at HIROSHIMA, 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	0%	21%	6%	17%	7.9–10.8°C
February	<1%	27%	9%	30%	7.9–12.3°C
March	2%	32%	14%	34%	12.2–15.4°C
April	28%	35%	19%	42%	17.5–20.9°C
May	62%	33%	19%	36%	21.8–25.2°C
June	59%	41%	23%	57%	24.4–27.7°C
July	63%	38%	22%	42%	28.2–32.3°C
August	74%	26%	12%	29%	29.8–33.6°C
September	64%	35%	18%	42%	25.9–30.0°C
October	66%	23%	11%	16%	21.2–24.4°C
November	17%	21%	8%	14%	15.7–18.8°C
December	<1%	18%	5%	12%	10.0–13.5°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 45-year average. Warmest: 2025. Coolest: 1965.2025

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 1862415
NOAA station: JA000047765 · HIROSHIMA
Station distance: 1.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 34.40°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 31 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 Hiroshima 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

Keep exploring

Same climate evidence,
different places.

These places read the same station, so their climate numbers are identical. Their setting, population and distance from HIROSHIMA are not.

HiroshimaKureOctober is the strongest comfort month on this shared record · population 214,592Explore the year HiroshimaHigashihiroshimaOctober is the strongest comfort month on this shared record · population 196,608Explore the year HiroshimaHatsukaichiOctober is the strongest comfort month on this shared record · population 114,173Explore the year HiroshimaGionOctober is the strongest comfort month on this shared record · population 68,713Explore the year HiroshimaFuchūOctober is the strongest comfort month on this shared record · population 51,155Explore the year HiroshimaAki-takataOctober is the strongest comfort month on this shared record · population 32,323Explore the year

Or put two places side by side: Hiroshima vs Kure