Japan · 1991–2020

Best time to visit
Itoman

For Itoman, December has the most comfortable weather in our climate comparison. Typical daytime highs are 21.6°C, nights average 16.5°C, and rainfall totals about 109 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthDecember

Typical daytime high21.6°C

Typical night-time low16.5°C

December rainfall109 mm

Overall comfort

December

Other strong months: November and January

73/100 weather score

Beach weather

November

Other strong months: October and April

63/100 weather score

Outdoor sightseeing

January

Other strong months: February and December

68/100 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 110 mmWet days: no more than 10

1 month fits your choices for Itoman

December21.6°C day · 109 mm rain · 9.7 wet days

August has the lowest comfort score at 13 out of 100, compared with December at 73. The main reason is that 257 mm of rain falls, and days average 31.7°C, 8° above the 24°C the score treats as ideal.

Quick answers

Planning a trip to Itoman?

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

When is the best time to visit Itoman?

December is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 21.6°C and 109 mm of rain.

What is the hottest month in Itoman?

July is hottest in this record, with a typical daytime high of 31.9°C and a night-time low of 27°C.

Which month has the least rain?

January and December have the lowest monthly rainfall total at 109 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.

6719.7° / 14.7°

6720.2° / 14.7°

6622° / 16.5°

6624.4° / 19°

3627.1° / 22°

1829.8° / 25.3°

2331.9° / 27°

1331.7° / 26.8°

1530.6° / 25.7°

4528.2° / 23.3°

6925.1° / 20.2°

7321.6° / 16.5°

Monthly climate evidence for Itoman — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 4 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	19.7°C	14.7°C	109 mm	11.8	22.6°C	10 h 40	67	Strong coverage
February	20.2°C	14.7°C	126 mm	10.6	21.7°C	11 h 14	67	Good coverage
March	22°C	16.5°C	150 mm	12.1	21.8°C	11 h 56	66	Strong coverage
April	24.4°C	19°C	163 mm	11.1	22.8°C	12 h 44	66	Strong coverage
May	27.1°C	22°C	263 mm	12.7	24.7°C	13 h 25	36	Strong coverage
June	29.8°C	25.3°C	295 mm	11.9	26.8°C	13 h 46	18	Strong coverage
July	31.9°C	27°C	192 mm	10.7	28.7°C	13 h 37	23	Strong coverage
August	31.7°C	26.8°C	257 mm	13.8	28.9°C	13 h 03	13	Strong coverage
September	30.6°C	25.7°C	287 mm	12.2	28.3°C	12 h 17	15	Strong coverage
October	28.2°C	23.3°C	182 mm	9.8	27.1°C	11 h 30	45	Strong coverage
November	25.1°C	20.2°C	126 mm	9	25.4°C	10 h 50	69	Strong coverage
December	21.6°C	16.5°C	109 mm	9.7	23.9°C	10 h 31	73	Strong coverage

Records at NAHA, 1961–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.0°C25 Jan 2020	6.1°C25 Jan 2016	104 mm25 Jan 1966	275 mm1966 · driest 0 mm in 2026	66
February	26.7°C15 Feb 2020	7.0°C18 Feb 1978	112 mm26 Feb 1972	342 mm1998 · driest 0 mm in 2026	66
March	28.2°C26 Mar 1999	7.8°C1 Mar 1963	166 mm12 Mar 1983	424 mm1983 · driest 0 mm in 2026	66
April	29.9°C27 Apr 2022	10.4°C3 Apr 1974	166 mm15 Apr 2024	531 mm1980 · driest 0 mm in 2025	66
May	31.6°C25 May 1963	10.2°C1 May 2026	179 mm3 May 2020	637 mm1966 · driest 0 mm in 2025	66
June	34.1°C28 Jun 2001	16.7°C6 Jun 1978	214 mm15 Jun 2023	858 mm2005 · driest 0 mm in 2025	66
July	35.1°C16 Jul 2017	19.6°C1 Jul 2026	359 mm9 Jul 2014	511 mm1961 · driest 0 mm in 2025	66
August	35.6°C9 Aug 2001	20.7°C28 Aug 1965	336 mm12 Aug 2007	745 mm2023 · driest 0 mm in 2025	65
September	34.6°C12 Sep 2009	18.5°C27 Sep 1972	412 mm22 Sep 1999	1082 mm2001 · driest 0 mm in 2025	65
October	33.6°C3 Oct 2025	16.4°C29 Oct 1980	243 mm5 Oct 1998	692 mm1998 · driest 0 mm in 2025	65
November	30.8°C7 Nov 2008	12.9°C26 Nov 1995	263 mm14 Nov 1971	370 mm1971 · driest 0 mm in 2025	65
December	29.4°C4 Dec 2018	9.4°C29 Dec 1967	143 mm6 Dec 1985	264 mm2000 · driest 0 mm in 2025	65

Typical days per month at NAHA, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	<1	0	4
February	1	0	3
March	5	0	5
April	13	0	4
May	26	2	6
June	29	15	6
July	30	28	4
August	30	28	4
September	29	21	5
October	28	5	4
November	15	<1	3
December	3	0	3

How often different weather occurs at NAHA, 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	23%	40%	12%	56%	17.6–20.7°C
February	27%	42%	13%	58%	17.8–21.1°C
March	40%	41%	15%	57%	19.8–23.0°C
April	60%	37%	15%	48%	22.9–25.4°C
May	58%	42%	21%	59%	25.6–28.1°C
June	58%	43%	21%	54%	28.0–30.7°C
July	65%	35%	12%	47%	30.5–32.6°C
August	54%	46%	18%	61%	30.2–32.4°C
September	59%	42%	16%	54%	29.2–31.2°C
October	68%	32%	11%	40%	26.5–29.2°C
November	65%	33%	11%	42%	23.4–25.7°C
December	46%	34%	11%	45%	19.8–22.5°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.

1961Each stripe is one year’s mean temperature against the 44-year average. Warmest: 1998. Coolest: 1968.2025

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 1861280
NOAA station: JA000047936 · NAHA
Station distance: 8.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 26.13°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 4 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 Itoman 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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These places read the same station, so their climate numbers are identical. Their setting, population and distance from NAHA are not.

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