Iida, Nagano Weather by Month and Climate Averages

How much rain does Iida get?

Iida gets 1516 mm of precipitation in an average year, spread over about 107 days with measurable rain. That is fewer rainy days than 58% of Japan.

July is the wettest month, with 217 mm. December is the driest, with 57 mm. July has the most rainy days, about 12.

The longest dry spell in the last five years lasted 19 days, to January 12, 2023.

Iida weather by month

Iida weather in January

In January, Iida averages a high of 7°C and a low of -4°C. It gets 57 mm of precipitation over about 7 rainy days. The sun is out about 48% of daylight hours. The January record high is 17°C (1973) and the record low is -13°C (1970).

Iida weather in February

In February, Iida averages a high of 9°C and a low of -4°C. It gets 71 mm of precipitation over about 7 rainy days. The sun is out about 47% of daylight hours. The February record high is 21°C (2024) and the record low is -13°C (1984).

Iida weather in March

In March, Iida averages a high of 13°C and a low of -1°C. It gets 120 mm of precipitation over about 9 rainy days. The sun is out about 44% of daylight hours. The March record high is 26°C (2021) and the record low is -9°C (1971).

Iida weather in April

In April, Iida averages a high of 19°C and a low of 5°C. It gets 128 mm of precipitation over about 9 rainy days. The sun is out about 38% of daylight hours. The April record high is 31°C (2003) and the record low is -4°C (2001). April is one of the most comfortable months to visit.

Iida weather in May

In May, Iida averages a high of 24°C and a low of 11°C. It gets 138 mm of precipitation over about 9 rainy days. The sun is out about 30% of daylight hours. The May record high is 34°C (2017) and the record low is 0°C (1972). May is one of the most comfortable months to visit.

Iida weather in June

In June, Iida averages a high of 27°C and a low of 16°C. It gets 180 mm of precipitation over about 12 rainy days. The sun is out about 19% of daylight hours. The June record high is 37°C (2022) and the record low is 7°C (1978). June is one of the most comfortable months to visit.

Iida weather in July

In July, Iida averages a high of 30°C and a low of 20°C. It gets 217 mm of precipitation over about 12 rainy days. The sun is out about 20% of daylight hours. The July record high is 37°C (2022) and the record low is 12°C (1976).

Iida weather in August

In August, Iida averages a high of 32°C and a low of 21°C. It gets 132 mm of precipitation over about 10 rainy days. The sun is out about 28% of daylight hours. The August record high is 38°C (2018) and the record low is 13°C (1981).

Iida weather in September

In September, Iida averages a high of 27°C and a low of 17°C. It gets 190 mm of precipitation over about 10 rainy days. The sun is out about 26% of daylight hours. The September record high is 36°C (2010) and the record low is 6°C (1992).

Iida weather in October

In October, Iida averages a high of 21°C and a low of 10°C. It gets 147 mm of precipitation over about 8 rainy days. The sun is out about 43% of daylight hours. The October record high is 31°C (2013) and the record low is -1°C (1984). October is one of the most comfortable months to visit.

Iida weather in November

In November, Iida averages a high of 15°C and a low of 3°C. It gets 80 mm of precipitation over about 7 rainy days. The sun is out about 52% of daylight hours. The November record high is 24°C (2000) and the record low is -6°C (1973).

Iida weather in December

In December, Iida averages a high of 9°C and a low of -2°C. It gets 57 mm of precipitation over about 8 rainy days. The sun is out about 49% of daylight hours. The December record high is 19°C (1987) and the record low is -12°C (1973).

Sunshine, humidity and wind in Iida

November is the sunniest month in Iida, with sunshine about 52% of daylight hours. June is the cloudiest, at 19%. Over the year the sun shines about 37% of daylight hours. Iida is cloudier than 61% of Japan.

Humidity peaks in July at 81% and is lowest in February at 61%.

Iida has about 24 days a year above 32°C. Iida is hotter than 62% of Japan.

First and last freeze in Iida

The first fall freeze in Iida typically comes around November 14, and the last spring freeze around April 6. That leaves a frost-free growing season of about 222 days.

Iida weather records

The hottest temperature on record at the Iida station is 38°C, on August 6, 2018. The coldest is -13°C, on February 4, 1984.

The wettest day on record brought 205 mm of rain, on September 28, 1983.

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

The best time to visit Iida

The most comfortable time to visit is typically April to June and October, when daytime highs sit near 23°C.

Winter (December–February) is chilly, with average highs around 8°C and lows near -3°C.

Spring (March–May) is mild, with average highs around 19°C and lows near 5°C.

Summer (June–August) is hot, with average highs around 29°C and lows near 19°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 21°C and lows near 10°C.

Iida climate questions

How much rain does Iida get?

Iida gets 1516 mm of precipitation in an average year, over about 107 rainy days.

What is the wettest month in Iida?

July is the wettest month in Iida, with 217 mm. December is the driest, with 57 mm.

How many rainy days does Iida have a year?

Iida has about 107 days with measurable rain in an average year. July has the most, about 12.

What is the hottest month in Iida?

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

What is the coldest month in Iida?

January is the coldest month in Iida, with an average low of -4°C.

What is the record high temperature in Iida?

The record high at the Iida station is 38°C, set on August 6, 2018. The record low is -13°C, on February 4, 1984.

What is the sunniest month in Iida?

November is the sunniest month in Iida, with sunshine about 52% of daylight hours. June is the cloudiest.

When is the first frost in Iida?

The first fall freeze in Iida typically comes around November 14. The last spring freeze is around April 6.

What is the best time to visit Iida?

The most comfortable time to visit is typically April to June and October, when daytime highs sit near 23°C.