Japan · 1991–2020

Best time to visit
Oyama

For Oyama, May has the most comfortable weather in our climate comparison. Typical daytime highs are 23.6°C, nights average 12.7°C, and rainfall totals about 150 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.

Best all-round monthMay

Typical daytime high23.6°C

Typical night-time low12.7°C

May rainfall150 mm

Overall comfort

May

Other strong months: October and June

71/100 weather score

Outdoor sightseeing

November

Other strong months: April and May

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 150 mmWet days: no more than 11

2 months fit your choices for Oyama

April19°C day · 135 mm rain · 10.7 wet days

May23.6°C day · 150 mm rain · 10.9 wet days

January has the lowest comfort score at 17 out of 100, compared with May at 71. The main reason is that days reach only 8.7°C, 15° below the 24°C the score treats as ideal, and nights drop to -3°C.

Quick answers

Planning a trip to Oyama?

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

When is the best time to visit Oyama?

May is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 23.6°C and 150 mm of rain.

What is the hottest month in Oyama?

August is hottest in this record, with a typical daytime high of 31.1°C and a night-time low of 22.4°C.

Which month has the least rain?

January has the lowest monthly rainfall total at 28 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.

178.7° / -3°

199.8° / -2.1°

2813.5° / 1.5°

4819° / 7°

7123.6° / 12.7°

4926.2° / 17.1°

3029.7° / 21.2°

2931.1° / 22.4°

4427.2° / 18.8°

5021.5° / 12°

4716° / 5.1°

2510.8° / -0.5°

Monthly climate evidence for Oyama — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.7°C	-3°C	28 mm	2.8	9 h 56	17	Good coverage
February	9.8°C	-2.1°C	39 mm	5.6	10 h 48	19	Good coverage
March	13.5°C	1.5°C	88 mm	8.8	11 h 51	28	Good coverage
April	19°C	7°C	135 mm	10.7	13 h 04	48	Good coverage
May	23.6°C	12.7°C	150 mm	10.9	14 h 04	71	Good coverage
June	26.2°C	17.1°C	235 mm	16.5	14 h 37	49	Good coverage
July	29.7°C	21.2°C	236 mm	16	14 h 24	30	Good coverage
August	31.1°C	22.4°C	214 mm	13.1	13 h 32	29	Good coverage
September	27.2°C	18.8°C	239 mm	13.8	12 h 22	44	Good coverage
October	21.5°C	12°C	243 mm	10.6	11 h 12	50	Good coverage
November	16°C	5.1°C	76 mm	6.6	10 h 11	47	Good coverage
December	10.8°C	-0.5°C	49 mm	4.8	9 h 42	25	Good coverage

What has changed

Recent daytime highs are
1.9°C warmer in Oyama.

Each bar shows the difference between the 2011–2025 average daytime high and the 1961–1990 average for the same month at the same station. A blank month does not have enough older observations for a reliable comparison.

Jan

+1.0

Feb

+1.6

Mar

+3.0

Apr

+2.0

May

+2.2

Jun

+2.5

Jul

+2.9

Aug

+1.7

Sep

+2.4

Oct

+1.4

Nov

+1.2

Dec

+0.6

May daytime highs, 2011–2025. Last recorded: 22.4°C.

Records at UTSUNOMIYA, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.9°C27 Jan 1969	-12.4°C25 Jan 1963	67 mm27 Jan 2002	112 mm2002 · driest 0 mm in 2019	75
February	24.6°C11 Feb 1962	-13.3°C20 Feb 1952	70 mm9 Feb 1985	140 mm1972 · driest 0 mm in 2026	75
March	27.2°C19 Mar 2013	-10.1°C6 Mar 1970	61 mm30 Mar 1977	170 mm2021 · driest 10 mm in 1973	75
April	30.1°C28 Apr 2015	-4.7°C6 Apr 1965	92 mm18 Apr 2020	240 mm1998 · driest 0 mm in 2025	75
May	34.4°C26 May 2019	-0.2°C3 May 1953	135 mm4 May 2012	343 mm1965 · driest 0 mm in 2025	74
June	37.6°C25 Jun 2022	7.7°C3 Jun 1952	179 mm28 Jun 1966	449 mm2014 · driest 0 mm in 2025	74
July	38.7°C5 Jul 1997	10.3°C3 Jul 1976	159 mm28 Jul 1997	374 mm2011 · driest 0 mm in 2025	75
August	37.5°C15 Aug 1996	12.3°C20 Aug 1956	219 mm7 Aug 1957	518 mm2008 · driest 0 mm in 2025	73
September	36.5°C2 Sep 2000	6.3°C24 Sep 1963	241 mm10 Sep 2015	496 mm1958 · driest 0 mm in 2025	73
October	33.5°C1 Oct 2018	0.4°C19 Oct 1957	266 mm12 Oct 2019	527 mm2019 · driest 0 mm in 1997	74
November	25.1°C5 Nov 1990	-5.9°C29 Nov 1969	90 mm7 Nov 1975	192 mm1975 · driest 0 mm in 2025	74
December	24.7°C5 Dec 2004	-9.6°C31 Dec 1967	131 mm27 Dec 2006	172 mm1968 · driest 0 mm in 1981	74

Typical days per month at UTSUNOMIYA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	15	1
February	0	0	13	<1
March	<1	0	6	3
April	2	0	<1	4
May	11	<1	0	4
June	18	4	0	5
July	25	15	0	5
August	27	20	0	4
September	20	7	0	6
October	4	<1	0	4
November	0	0	1	2
December	0	0	10	1

How often different weather occurs at UTSUNOMIYA, 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%	12%	4%	6%	7.0–9.8°C
February	<1%	21%	5%	19%	7.4–11.3°C
March	4%	29%	11%	31%	11.0–14.7°C
April	26%	36%	15%	44%	16.5–20.3°C
May	54%	38%	16%	47%	21.0–24.5°C
June	50%	49%	21%	68%	23.0–27.4°C
July	53%	47%	19%	60%	26.2–31.6°C
August	61%	39%	17%	51%	28.7–32.8°C
September	54%	46%	22%	62%	24.3–28.4°C
October	44%	34%	16%	34%	19.5–22.3°C
November	9%	21%	8%	17%	14.3–17.3°C
December	<1%	13%	4%	6%	9.2–12.1°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 46-year average. Warmest: 2025. Coolest: 1976.2025

The evidence behind this page

Where these figures
come from.

Place identity: GeoNames 1853483
NOAA station: JA000047615 · UTSUNOMIYA
Station distance: 28.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 36.30°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 Oyama 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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Or put two places side by side: Oyama vs Utsunomiya

Best time to visitOyama

May

November

Choose the weatherthat suits you.