Nishio, Aichi Weather by Month and Climate Averages

Nishio, Aichi gets 1369 mm of precipitation a year over about 82 rainy days. August is the warmest month (average high 32°C) and January the coldest (average low 2°C).

Nishio climate at a glance

Humid subtropical climate

Nishio, Aichi has hot summers and chilly winters. Daytime highs range from about 9°C in January to 32°C in August. September is usually the wettest month. The most comfortable time to visit is typically April to June and October to November, when daytime highs sit near 22°C.

How much rain does Nishio get?

Nishio gets 1369 mm of precipitation in an average year, spread over about 82 days with measurable rain. That is fewer rainy days than 97% of Japan.

September is the wettest month, with 195 mm. December is the driest, with 51 mm. June has the most rainy days, about 10.

The longest dry spell in the last five years lasted 18 days, to January 12, 2023.

Nishio weather by month

Nishio weather in January

In January, Nishio averages a high of 9°C and a low of 2°C. It gets 53 mm of precipitation over about 4 rainy days. The sun is out about 60% of daylight hours. The January record high is 17°C (1997) and the record low is -4°C (1997).

Nishio weather in February

In February, Nishio averages a high of 10°C and a low of 2°C. It gets 59 mm of precipitation over about 5 rainy days. The sun is out about 55% of daylight hours. The February record high is 22°C (2024) and the record low is -4°C (1984).

Nishio weather in March

In March, Nishio averages a high of 14°C and a low of 5°C. It gets 104 mm of precipitation over about 7 rainy days. The sun is out about 48% of daylight hours. The March record high is 24°C (2018) and the record low is -3°C (1977).

Nishio weather in April

In April, Nishio averages a high of 19°C and a low of 9°C. It gets 118 mm of precipitation over about 7 rainy days. The sun is out about 43% of daylight hours. The April record high is 28°C (2005) and the record low is 1°C (1985). April is one of the most comfortable months to visit.

Nishio weather in May

In May, Nishio averages a high of 23°C and a low of 14°C. It gets 133 mm of precipitation over about 8 rainy days. The sun is out about 35% of daylight hours. The May record high is 31°C (2019) and the record low is 6°C (1987). May is one of the most comfortable months to visit.

Nishio weather in June

In June, Nishio averages a high of 26°C and a low of 19°C. It gets 146 mm of precipitation over about 10 rainy days. The sun is out about 26% of daylight hours. The June record high is 36°C (2011) and the record low is 12°C (1978). June is one of the most comfortable months to visit.

Nishio weather in July

In July, Nishio averages a high of 30°C and a low of 23°C. It gets 146 mm of precipitation over about 9 rainy days. The sun is out about 31% of daylight hours. The July record high is 38°C (2018) and the record low is 16°C (1976).

Nishio weather in August

In August, Nishio averages a high of 32°C and a low of 24°C. It gets 92 mm of precipitation over about 6 rainy days. The sun is out about 40% of daylight hours. The August record high is 38°C (1994) and the record low is 17°C (1981).

Nishio weather in September

In September, Nishio averages a high of 28°C and a low of 21°C. It gets 195 mm of precipitation over about 9 rainy days. The sun is out about 38% of daylight hours. The September record high is 36°C (2010) and the record low is 13°C (1980).

Nishio weather in October

In October, Nishio averages a high of 23°C and a low of 16°C. It gets 188 mm of precipitation over about 8 rainy days. The sun is out about 51% of daylight hours. The October record high is 30°C (2013) and the record low is 7°C (1976). October is one of the most comfortable months to visit.

Nishio weather in November

In November, Nishio averages a high of 17°C and a low of 9°C. It gets 86 mm of precipitation over about 5 rainy days. The sun is out about 61% of daylight hours. The November record high is 26°C (2024) and the record low is 2°C (1973). November is one of the most comfortable months to visit.

Nishio weather in December

In December, Nishio averages a high of 12°C and a low of 4°C. It gets 51 mm of precipitation over about 4 rainy days. The sun is out about 66% of daylight hours. The December record high is 23°C (2015) and the record low is -2°C (1983).

Sunshine, humidity and wind in Nishio

December is the sunniest month in Nishio, with sunshine about 66% of daylight hours. June is the cloudiest, at 26%. Over the year the sun shines about 46% of daylight hours. Nishio is sunnier than 99% of Japan.

Humidity peaks in July at 84% and is lowest in February at 66%.

Nishio has about 19 days a year above 32°C. Nishio is cooler than 52% of Japan.

Nishio weather records

The hottest temperature on record at the Nishio station is 38°C, on August 11, 2013. The coldest is -4°C, on January 22, 1997.

The wettest day on record brought 301 mm of rain, on October 12, 2019.

39 all-time records have been set at the station since 1970.

The best time to visit Nishio

The most comfortable time to visit is typically April to June and October to November, when daytime highs sit near 22°C.

Winter (December–February) is chilly, with average highs around 11°C and lows near 3°C.

Spring (March–May) is mild, with average highs around 19°C and lows near 10°C.

Summer (June–August) is hot, with average highs around 29°C and lows near 22°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 23°C and lows near 15°C.

Monthly climate

MonthPrecipRain daysHumiditySunshineSea tempRecord highRecord low
January53 mm467%60%-11°17°-4°
February59 mm566%55%-11°22°-4°
March104 mm770%48%-11°24°-3°
April118 mm771%43%-9°28°
May133 mm876%35%-7°31°
June146 mm1082%26%-5°36°12°
July146 mm984%31%-3°38°16°
August92 mm682%40%-2°38°17°
September195 mm978%38%-3°36°13°
October188 mm871%51%-5°30°
November86 mm569%61%-7°26°
December51 mm466%66%-9°23°-2°

From ERA5 reanalysis. Sunshine is estimated from cloud cover.

Nishio climate questions

How much rain does Nishio get?

Nishio gets 1369 mm of precipitation in an average year, over about 82 rainy days.

What is the wettest month in Nishio?

September is the wettest month in Nishio, with 195 mm. December is the driest, with 51 mm.

How many rainy days does Nishio have a year?

Nishio has about 82 days with measurable rain in an average year. June has the most, about 10.

What is the hottest month in Nishio?

August is the warmest month in Nishio, with an average high of 32°C.

What is the coldest month in Nishio?

January is the coldest month in Nishio, with an average low of 2°C.

What is the record high temperature in Nishio?

The record high at the Nishio station is 38°C, set on August 11, 2013. The record low is -4°C, on January 22, 1997.

What is the sunniest month in Nishio?

December is the sunniest month in Nishio, with sunshine about 66% of daylight hours. June is the cloudiest.

What is the best time to visit Nishio?

The most comfortable time to visit is typically April to June and October to November, when daytime highs sit near 22°C.

Source: NOAA GHCN-Daily station IRAKO (26 km away).

GraySky app icon
GraySky on your iPhone
See the forecast and climate for Nishio, Aichi.
App Store

Normals from NOAA GHCN-Daily station IRAKO.