Japan · 1991–2020

Best time to visit
Niigata.

June leads for comfortable weather in Niigata: typically 24.7°C by day, 17.5°C at night, with 113 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high24.7°C

Typical low17.5°C

Rain in June113 mm

Comfort

June

June · May · September

76climate match

Beach

June

June · September · August

57climate match

Outdoors

May

May · April · October

72climate match

The weakest month is January, scoring 5 against June’s 76 — days reach only 5.8°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

55.8° / 0°

Feb

56.5° / -0.3°

Mar

510.3° / 1.9°

Apr

4116.2° / 6.7°

May

7421.6° / 12.7°

Jun

7624.7° / 17.5°

Jul

2128.7° / 22°

Aug

2930.5° / 23.1°

Sep

5726.5° / 19.4°

Oct

5320.6° / 12.6°

Nov

814.6° / 6.6°

Dec

59° / 2.2°

Monthly climate evidence for Niigata — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 16 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	5.8°C	0°C	202 mm	23.1	12.3°C	9 h 48	5	Good coverage
February	6.5°C	-0.3°C	140 mm	19.4	10.4°C	10 h 43	5	Good coverage
March	10.3°C	1.9°C	131 mm	18.3	9.7°C	11 h 50	5	Good coverage
April	16.2°C	6.7°C	109 mm	12.1	10.9°C	13 h 07	41	Good coverage
May	21.6°C	12.7°C	94 mm	9.7	14.5°C	14 h 12	74	Good coverage
June	24.7°C	17.5°C	113 mm	9.4	19.3°C	14 h 47	76	Good coverage
July	28.7°C	22°C	316 mm	15.9	23.1°C	14 h 33	21	Good coverage
August	30.5°C	23.1°C	222 mm	12.6	26.3°C	13 h 38	29	Good coverage
September	26.5°C	19.4°C	158 mm	13.2	25.1°C	12 h 23	57	Good coverage
October	20.6°C	12.6°C	186 mm	14.3	21.6°C	11 h 09	53	Good coverage
November	14.6°C	6.6°C	248 mm	21.1	18.2°C	10 h 04	8	Good coverage
December	9°C	2.2°C	242 mm	22.9	15.1°C	9 h 33	5	Good coverage

Records at NIIGATA, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.3°C1 Jan 1997	-8.3°C21 Jan 1984	55 mm11 Jan 2002	367 mm2002 · driest 84 mm in 2006	75
February	21.3°C22 Feb 2004	-10.6°C17 Feb 1978	60 mm2 Feb 1961	262 mm1983 · driest 0 mm in 2026	75
March	24.7°C27 Mar 2025	-5.4°C7 Mar 1971	64 mm24 Mar 1963	199 mm1959 · driest 0 mm in 2026	75
April	30.7°C21 Apr 1987	-1.8°C2 Apr 1970	61 mm23 Apr 2007	172 mm2003 · driest 0 mm in 2025	75
May	32.9°C2 May 1998	2.2°C3 May 1953	73 mm20 May 1985	215 mm1985 · driest 0 mm in 2025	74
June	34.7°C21 Jun 2004	9.6°C4 Jun 1973	146 mm27 Jun 1978	378 mm1978 · driest 0 mm in 2025	75
July	38.4°C29 Jul 2018	12.5°C16 Jul 2026	141 mm24 Jul 1958	644 mm2020 · driest 0 mm in 2025	75
August	39.9°C23 Aug 2018	14.5°C20 Aug 1956	265 mm4 Aug 1998	518 mm1998 · driest 0 mm in 2025	73
September	37.1°C13 Sep 2003	9.3°C26 Sep 1976	132 mm3 Sep 1984	337 mm1958 · driest 0 mm in 2025	73
October	33.2°C6 Oct 2018	3.0°C31 Oct 1983	77 mm21 Oct 2004	285 mm1975 · driest 0 mm in 2025	74
November	27.2°C1 Nov 1977	-1.8°C30 Nov 1970	102 mm26 Nov 1988	413 mm2002 · driest 0 mm in 2025	74
December	20.4°C1 Dec 2025	-9.5°C31 Dec 1969	78 mm23 Dec 1962	421 mm2014 · driest 0 mm in 2025	74

Typical days per month at NIIGATA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	8	6
February	0	0	9	4
March	0	0	3	3
April	1	0	0	3
May	7	<1	0	3
June	13	1	0	4
July	24	11	0	5
August	28	17	0	4
September	18	5	0	4
October	2	<1	0	5
November	0	0	<1	7
December	0	0	2	8

How often, not how much — every day in NIIGATA’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%	72%	23%	95%	3.5–6.9°C
February	<1%	64%	14%	87%	3.6–8.0°C
March	<1%	53%	11%	71%	8.0–11.2°C
April	13%	41%	14%	52%	14.4–17.6°C
May	43%	35%	11%	36%	19.5–22.8°C
June	58%	37%	15%	46%	22.7–25.7°C
July	60%	42%	21%	49%	26.1–30.2°C
August	68%	32%	15%	41%	28.2–31.9°C
September	55%	44%	18%	62%	24.3–27.9°C
October	29%	48%	20%	68%	18.7–21.2°C
November	3%	61%	26%	88%	12.7–15.5°C
December	0%	74%	29%	97%	6.6–10.2°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 41-year average. Warmest: 2025. Coolest: 1976.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1855431
NOAA station: JA000047604 · NIIGATA
Station distance: 1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 37.92°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 16 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 NIIGATA is what differs

Shibata→Sanjō→Tsubame→Niitsu-honchō→Gosen→Mitsuke→

Or put two places side by side: Niigata vs Shibata

Best time to visitNiigata.

June

June

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Niigata.

The whole year,
without the guesswork.

Nearby, measured,
and named.