Japan · 1991–2020

Best time to visit
Watari.

June leads for comfortable weather in Watari: typically 23.2°C by day, 15.9°C at night, with 153 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.2°C

Typical low15.9°C

Rain in June153 mm

Comfort

June

June · May · September

73climate match

Beach

August

August · July · June

62climate match

Outdoors

May

May · October · November

73climate match

The weakest month is January, scoring 5 against June’s 73 — days reach only 5.7°C, 18° 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

55.7° / -1.7°

Feb

86.6° / -1.8°

Mar

1610.1° / 0.9°

Apr

4115.8° / 5.8°

May

6320.5° / 11.3°

Jun

7323.2° / 15.9°

Jul

4227.1° / 20°

Aug

4728.2° / 21.3°

Sep

5625.1° / 17.9°

Oct

5219.9° / 11.3°

Nov

4214° / 5.2°

Dec

168.5° / 0.7°

Monthly climate evidence for Watari — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 26 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	5.7°C	-1.7°C	49 mm	8.3	11.2°C	9 h 47	5	Good coverage
February	6.6°C	-1.8°C	41 mm	6.8	9.1°C	10 h 43	8	Good coverage
March	10.1°C	0.9°C	88 mm	9	8.6°C	11 h 50	16	Good coverage
April	15.8°C	5.8°C	108 mm	8.8	10.3°C	13 h 08	41	Good coverage
May	20.5°C	11.3°C	125 mm	9.3	13.5°C	14 h 12	63	Good coverage
June	23.2°C	15.9°C	153 mm	10.3	17.7°C	14 h 47	73	Good coverage
July	27.1°C	20°C	217 mm	17.1	21.1°C	14 h 34	42	Good coverage
August	28.2°C	21.3°C	177 mm	12.1	23.7°C	13 h 38	47	Good coverage
September	25.1°C	17.9°C	213 mm	14.1	22.6°C	12 h 23	56	Good coverage
October	19.9°C	11.3°C	189 mm	9.5	19.4°C	11 h 08	52	Good coverage
November	14°C	5.2°C	68 mm	6.4	16.5°C	10 h 04	42	Good coverage
December	8.5°C	0.7°C	58 mm	6.9	13.8°C	9 h 32	16	Good coverage

What has changed

Watari runs +1.7°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+0.6

Feb

+1.1

Mar

+2.3

Apr

+1.5

May

+2.0

Jun

+2.4

Jul

+3.2

Aug

+1.2

Sep

+2.0

Oct

—

Nov

—

Dec

+0.3

June daytime highs, 2011–2025. Last recorded: 27.0°C.

Records at SENDAI, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.9°C5 Jan 1960	-10.2°C17 Jan 1967	68 mm27 Jan 2002	149 mm2002 · driest 0 mm in 2026	75
February	20.9°C14 Feb 2016	-8.8°C17 Feb 1978	65 mm16 Feb 2021	140 mm1972 · driest 0 mm in 2026	75
March	24.2°C19 Mar 2009	-8.5°C6 Mar 1970	107 mm10 Mar 2015	185 mm2015 · driest 0 mm in 2026	75
April	29.9°C22 Apr 2018	-2.6°C2 Apr 1958	130 mm26 Apr 1994	217 mm1989 · driest 0 mm in 2025	75
May	33.2°C27 May 1961	0.4°C3 May 1951	143 mm4 May 2012	265 mm1955 · driest 0 mm in 2025	75
June	35.1°C25 Jun 2022	7.7°C1 Jun 1972	138 mm28 Jun 1966	351 mm1954 · driest 0 mm in 2025	75
July	36.7°C22 Jul 2018	9.0°C1 Jul 1976	126 mm8 Jul 2000	445 mm1980 · driest 0 mm in 2025	75
August	37.3°C1 Aug 2018	13.4°C9 Aug 1980	296 mm5 Aug 1986	435 mm2008 · driest 0 mm in 2025	74
September	36.0°C1 Sep 1985	7.6°C29 Sep 1960	172 mm26 Sep 1958	498 mm1994 · driest 0 mm in 2025	74
October	29.9°C2 Oct 1998	1.2°C27 Oct 1952	150 mm14 Oct 2014	337 mm1991 · driest 0 mm in 2025	74
November	24.4°C2 Nov 1979	-5.0°C30 Nov 1970	111 mm20 Nov 1970	243 mm1975 · driest 0 mm in 2025	74
December	21.8°C1 Dec 1990	-8.7°C30 Dec 1976	108 mm23 Dec 2010	250 mm2010 · driest 0 mm in 2025	74

Typical days per month at SENDAI, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	14	1
February	0	0	13	<1
March	0	0	8	2
April	<1	0	<1	3
May	3	<1	0	3
June	9	<1	0	4
July	19	8	0	4
August	23	11	0	4
September	14	3	0	4
October	2	0	0	4
November	0	0	<1	2
December	0	0	7	1

How often, not how much — every day in SENDAI’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%	20%	4%	14%	3.9–6.7°C
February	<1%	23%	5%	21%	4.1–8.0°C
March	<1%	25%	8%	23%	7.9–11.0°C
April	11%	30%	11%	29%	13.7–17.2°C
May	40%	31%	12%	33%	18.7–21.8°C
June	49%	40%	15%	52%	20.4–24.7°C
July	52%	47%	18%	58%	23.4–29.0°C
August	61%	39%	15%	52%	26.1–30.3°C
September	56%	42%	18%	52%	23.2–26.3°C
October	32%	30%	12%	26%	18.2–20.6°C
November	3%	22%	7%	18%	12.2–15.1°C
December	0%	20%	4%	13%	6.7–9.9°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: 1984.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2110586
NOAA station: JA000047590 · SENDAI
Station distance: 26.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 38.03°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 26 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 SENDAI is what differs

Sendai→Natori-shi→Tagajō-shi→Shiogama→Tomiya→Iwanuma→

Or put two places side by side: Watari vs Sendai

Best time to visitWatari.

June

August

May

The whole year,without the guesswork.

Watari runs +1.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Watari.

The whole year,
without the guesswork.

Watari runs +1.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.