Climate averages 1991–2020

Niigata weather
in July.

A warm, very wet month: the 2nd warmest and the wettest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 26.6°C Daytime mean, July

Average low 21.2°C Night-time mean, July

Rainfall 226 mm 15 days with ≥1 mm

Daylight 15 h Sunrise to sunset, per day

July is a warm month in Niigata: daytime highs average 26.6°C and nights cool to about 21.2°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 226 mm of rain on roughly 15 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 31 min on an average July day.

The nearest other city in this atlas is Shibata (26 km away). In July its highs average 27.1°C, about as warm as Niigata, with 274 mm of rain.

Among the 303 cities listed in Japan, Niigata ranks joint 253rd of 303 for the warmest July highs and 198th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Niigata is 1.2°C cooler than that mean.

From July to August, average highs rise by 1.7°C to 28.3°C, and monthly rainfall falls from 226 mm to 159 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Niigata climate table

1991–2020

Monthly climate averages for Niigata, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	4.2°C0.0°C	0.0°C	178	26.6	9.910 h
February	4.7°C-0.6°C	-0.6°C	115	21.3	10.811 h
March	8.6°C1.8°C	1.8°C	110	18.6	11.912 h
April	14.1°C6.0°C	6.0°C	90	12.6	13.213 h
May	19.4°C11.4°C	11.4°C	99	11.8	14.214 h
June	23.1°C16.5°C	16.5°C	123	11.2	14.715 h
July, selected	26.6°C21.2°C	21.2°C	226	15.2	14.515 h
August	28.3°C22.7°C	22.7°C	159	12.9	13.614 h
September	24.7°C19.2°C	19.2°C	146	14.2	12.512 h
October	19.1°C13.1°C	13.1°C	155	15.8	11.211 h
November	13.2°C7.5°C	7.5°C	164	19.7	10.210 h
December	7.5°C2.7°C	2.7°C	195	25.4	9.610 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Niigata

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Niigata) is explained once on the Niigata year overview and on the Sources, method and limits page.