Kiryū, Gunma Weather by Month and Climate Averages

How much rain does Kiryū get?

Kiryū gets 1169 mm of precipitation in an average year, spread over about 99 days with measurable rain. That is fewer rainy days than 77% of Japan.

September is the wettest month, with 193 mm. December is the driest, with 22 mm. July has the most rainy days, about 15.

The longest dry spell in the last five years lasted 41 days, to February 6, 2026.

Kiryū weather by month

Kiryū weather in January

In January, Kiryū averages a high of 9°C and a low of -1°C. It gets 26 mm of precipitation over about 3 rainy days. The sun is out about 50% of daylight hours. The January record high is 19°C (1996) and the record low is -8°C (1970).

Kiryū weather in February

In February, Kiryū averages a high of 10°C and a low of -1°C. It gets 24 mm of precipitation over about 4 rainy days. The sun is out about 48% of daylight hours. The February record high is 23°C (1987) and the record low is -9°C (1981).

Kiryū weather in March

In March, Kiryū averages a high of 14°C and a low of 3°C. It gets 53 mm of precipitation over about 7 rainy days. The sun is out about 43% of daylight hours. The March record high is 27°C (1998) and the record low is -7°C (1977).

Kiryū weather in April

In April, Kiryū averages a high of 19°C and a low of 8°C. It gets 71 mm of precipitation over about 8 rainy days. The sun is out about 41% of daylight hours. The April record high is 32°C (1983) and the record low is -2°C (1978). April is one of the most comfortable months to visit.

Kiryū weather in May

In May, Kiryū averages a high of 24°C and a low of 13°C. It gets 94 mm of precipitation over about 9 rainy days. The sun is out about 32% of daylight hours. The May record high is 37°C (1993) and the record low is 3°C (1991). May is one of the most comfortable months to visit.

Kiryū weather in June

In June, Kiryū averages a high of 27°C and a low of 18°C. It gets 144 mm of precipitation over about 13 rainy days. The sun is out about 23% of daylight hours. The June record high is 39°C (2022) and the record low is 8°C (1978).

Kiryū weather in July

In July, Kiryū averages a high of 31°C and a low of 22°C. It gets 179 mm of precipitation over about 15 rainy days. The sun is out about 22% of daylight hours. The July record high is 40°C (2001) and the record low is 12°C (1976).

Kiryū weather in August

In August, Kiryū averages a high of 32°C and a low of 23°C. It gets 186 mm of precipitation over about 12 rainy days. The sun is out about 27% of daylight hours. The August record high is 41°C (2025) and the record low is 15°C (1976).

Kiryū weather in September

In September, Kiryū averages a high of 27°C and a low of 19°C. It gets 193 mm of precipitation over about 12 rainy days. The sun is out about 24% of daylight hours. The September record high is 38°C (1984) and the record low is 8°C (1995).

Kiryū weather in October

In October, Kiryū averages a high of 22°C and a low of 13°C. It gets 137 mm of precipitation over about 8 rainy days. The sun is out about 40% of daylight hours. The October record high is 32°C (2012) and the record low is 3°C (1971). October is one of the most comfortable months to visit.

Kiryū weather in November

In November, Kiryū averages a high of 17°C and a low of 7°C. It gets 40 mm of precipitation over about 5 rainy days. The sun is out about 58% of daylight hours. The November record high is 26°C (2019) and the record low is -2°C (1974).

Kiryū weather in December

In December, Kiryū averages a high of 12°C and a low of 2°C. It gets 22 mm of precipitation over about 3 rainy days. The sun is out about 56% of daylight hours. The December record high is 25°C (1990) and the record low is -6°C (1976).

Sunshine, humidity and wind in Kiryū

November is the sunniest month in Kiryū, with sunshine about 58% of daylight hours. July is the cloudiest, at 22%. Over the year the sun shines about 39% of daylight hours. Kiryū is sunnier than 57% of Japan.

Humidity peaks in September at 81% and is lowest in February at 57%.

Kiryū has about 29 days a year above 32°C. Kiryū is hotter than 76% of Japan.

First and last freeze in Kiryū

The first fall freeze in Kiryū typically comes around December 9, and the last spring freeze around March 23. That leaves a frost-free growing season of about 261 days.

Kiryū weather records

The hottest temperature on record at the Kiryū station is 41°C, on August 5, 2025. The coldest is -9°C, on February 27, 1981.

The wettest day on record brought 340 mm of rain, on August 23, 1993.

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

The best time to visit Kiryū

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

Winter (December–February) is chilly, with average highs around 10°C and lows near 0°C.

Spring (March–May) is mild, with average highs around 19°C and lows near 8°C.

Summer (June–August) is hot, with average highs around 30°C and lows near 21°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 22°C and lows near 13°C.

Kiryū climate questions

How much rain does Kiryū get?

Kiryū gets 1169 mm of precipitation in an average year, over about 99 rainy days.

What is the wettest month in Kiryū?

September is the wettest month in Kiryū, with 193 mm. December is the driest, with 22 mm.

How many rainy days does Kiryū have a year?

Kiryū has about 99 days with measurable rain in an average year. July has the most, about 15.

What is the hottest month in Kiryū?

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

What is the coldest month in Kiryū?

January is the coldest month in Kiryū, with an average low of -1°C.

What is the record high temperature in Kiryū?

The record high at the Kiryū station is 41°C, set on August 5, 2025. The record low is -9°C, on February 27, 1981.

What is the sunniest month in Kiryū?

November is the sunniest month in Kiryū, with sunshine about 58% of daylight hours. July is the cloudiest.

When is the first frost in Kiryū?

The first fall freeze in Kiryū typically comes around December 9. The last spring freeze is around March 23.

What is the best time to visit Kiryū?

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