Climate averages 1991–2020

Yamagata 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 25.7°C Daytime mean, July

Average low 18.4°C Night-time mean, July

Rainfall 189 mm 17 days with ≥1 mm

Daylight 15 h Sunrise to sunset, per day

July is a warm month in Yamagata: daytime highs average 25.7°C and nights cool to about 18.4°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 189 mm of rain on roughly 17 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 33 min on an average July day.

The nearest other city in this atlas is Yonezawa (42 km away). In July its highs average 26.6°C, 0.9°C warmer than Yamagata, with 241 mm of rain.

Among the 303 cities listed in Japan, Yamagata ranks joint 274th of 303 for the warmest July highs and joint 121st of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Yamagata is 2.2°C cooler than that mean.

From July to August, average highs rise by 1.3°C to 26.9°C, and monthly rainfall falls from 189 mm to 146 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly precipitation

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

Yamagata climate table

1991–2020

Monthly climate averages for Yamagata, 1991–2020
Month	Average highHigh / low	Average low	Precipitation mm/month	Wet days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	0.8°C-6.4°C	-6.4°C	126	21.8	9.810 h
February	1.8°C-6.0°C	-6.0°C	91	18.1	10.711 h
March	5.6°C-3.1°C	-3.1°C	109	16.9	11.912 h
April	12.8°C2.0°C	2.0°C	94	13.7	13.213 h
May	19.2°C8.4°C	8.4°C	91	11.9	14.214 h
June	22.6°C13.8°C	13.8°C	119	12.5	14.815 h
July, selected	25.7°C18.4°C	18.4°C	189	17.4	14.515 h
August	26.9°C19.5°C	19.5°C	146	14.8	13.614 h
September	22.8°C15.5°C	15.5°C	125	13.0	12.512 h
October	16.9°C8.7°C	8.7°C	118	12.4	11.211 h
November	10.6°C2.2°C	2.2°C	95	15.3	10.110 h
December	3.9°C-3.0°C	-3.0°C	120	20.0	9.610 h

Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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 Yamagata

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 Yamagata) is explained once on the Yamagata year overview and on the Sources, method and limits page.