Iwata, Shizuoka Weather by Month and Climate Averages

How much rain does Iwata get?

Iwata gets 1582 mm of precipitation in an average year, spread over about 91 days with measurable rain. That is fewer rainy days than 91% of Japan.

September is the wettest month, with 203 mm. December is the driest, with 51 mm. June has the most rainy days, about 11.

The longest dry spell in the last five years lasted 21 days, to January 12, 2023.

Iwata weather by month

Iwata weather in January

In January, Iwata averages a high of 11°C and a low of 2°C. It gets 52 mm of precipitation over about 5 rainy days. The sun is out about 64% of daylight hours. The January record high is 19°C (1972) and the record low is -4°C (1997).

Iwata weather in February

In February, Iwata averages a high of 12°C and a low of 2°C. It gets 71 mm of precipitation over about 6 rainy days. The sun is out about 57% of daylight hours. The February record high is 23°C (2024) and the record low is -6°C (1981).

Iwata weather in March

In March, Iwata averages a high of 15°C and a low of 5°C. It gets 131 mm of precipitation over about 8 rainy days. The sun is out about 48% of daylight hours. The March record high is 26°C (2023) and the record low is -3°C (1977).

Iwata weather in April

In April, Iwata averages a high of 20°C and a low of 10°C. It gets 153 mm of precipitation over about 8 rainy days. The sun is out about 40% of daylight hours. The April record high is 28°C (2005) and the record low is 1°C (1972). April is one of the most comfortable months to visit.

Iwata weather in May

In May, Iwata averages a high of 24°C and a low of 14°C. It gets 159 mm of precipitation over about 8 rainy days. The sun is out about 32% of daylight hours. The May record high is 32°C (2015) and the record low is 7°C (1972). May is one of the most comfortable months to visit.

Iwata weather in June

In June, Iwata averages a high of 27°C and a low of 19°C. It gets 195 mm of precipitation over about 11 rainy days. The sun is out about 23% of daylight hours. The June record high is 37°C (2011) and the record low is 12°C (1978). June is one of the most comfortable months to visit.

Iwata weather in July

In July, Iwata averages a high of 30°C and a low of 23°C. It gets 185 mm of precipitation over about 10 rainy days. The sun is out about 29% of daylight hours. The July record high is 40°C (2026) and the record low is 16°C (1976).

Iwata weather in August

In August, Iwata averages a high of 32°C and a low of 24°C. It gets 108 mm of precipitation over about 7 rainy days. The sun is out about 36% of daylight hours. The August record high is 41°C (2020) and the record low is 18°C (1986).

Iwata weather in September

In September, Iwata averages a high of 29°C and a low of 21°C. It gets 203 mm of precipitation over about 10 rainy days. The sun is out about 35% of daylight hours. The September record high is 37°C (2003) and the record low is 13°C (1980).

Iwata weather in October

In October, Iwata averages a high of 24°C and a low of 16°C. It gets 180 mm of precipitation over about 8 rainy days. The sun is out about 46% of daylight hours. The October record high is 32°C (2013) and the record low is 7°C (1986). October is one of the most comfortable months to visit.

Iwata weather in November

In November, Iwata averages a high of 18°C and a low of 9°C. It gets 95 mm of precipitation over about 6 rainy days. The sun is out about 60% of daylight hours. The November record high is 28°C (2000) and the record low is 1°C (1988). November is one of the most comfortable months to visit.

Iwata weather in December

In December, Iwata averages a high of 13°C and a low of 4°C. It gets 51 mm of precipitation over about 4 rainy days. The sun is out about 71% of daylight hours. The December record high is 23°C (2015) and the record low is -2°C (1973).

Sunshine, humidity and wind in Iwata

December is the sunniest month in Iwata, with sunshine about 71% of daylight hours. June is the cloudiest, at 23%. Over the year the sun shines about 45% of daylight hours. Iwata is sunnier than 99% of Japan.

Humidity peaks in September at 78% and is lowest in February at 57%.

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

First and last freeze in Iwata

The first fall freeze in Iwata typically comes around December 20, and the last spring freeze around February 25. That leaves a frost-free growing season of about 298 days.

Iwata weather records

The hottest temperature on record at the Iwata station is 41°C, on August 17, 2020. The coldest is -6°C, on February 27, 1981.

The wettest day on record brought 226 mm of rain, on August 31, 1971.

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

The best time to visit Iwata

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 12°C and lows near 3°C.

Spring (March–May) is mild, with average highs around 20°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 24°C and lows near 15°C.

Iwata climate questions

How much rain does Iwata get?

Iwata gets 1582 mm of precipitation in an average year, over about 91 rainy days.

What is the wettest month in Iwata?

September is the wettest month in Iwata, with 203 mm. December is the driest, with 51 mm.

How many rainy days does Iwata have a year?

Iwata has about 91 days with measurable rain in an average year. June has the most, about 11.

What is the hottest month in Iwata?

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

What is the coldest month in Iwata?

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

What is the record high temperature in Iwata?

The record high at the Iwata station is 41°C, set on August 17, 2020. The record low is -6°C, on February 27, 1981.

What is the sunniest month in Iwata?

December is the sunniest month in Iwata, with sunshine about 71% of daylight hours. June is the cloudiest.

When is the first frost in Iwata?

The first fall freeze in Iwata typically comes around December 20. The last spring freeze is around February 25.

What is the best time to visit Iwata?

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