Koshigaya, Saitama Weather by Month and Climate Averages

How much rain does Koshigaya get?

Koshigaya gets 1469 mm of precipitation in an average year, spread over about 103 days with measurable rain. That is fewer rainy days than 66% of Japan.

October is the wettest month, with 212 mm. December is the driest, with 49 mm. June has the most rainy days, about 12.

The longest dry spell in the last five years lasted 28 days, to February 9, 2022.

Koshigaya weather by month

Koshigaya weather in January

In January, Koshigaya averages a high of 10°C and a low of 2°C. It gets 52 mm of precipitation over about 4 rainy days. The sun is out about 61% of daylight hours. The January record high is 20°C (1996) and the record low is -4°C (1970).

Koshigaya weather in February

In February, Koshigaya averages a high of 11°C and a low of 3°C. It gets 50 mm of precipitation over about 5 rainy days. The sun is out about 58% of daylight hours. The February record high is 24°C (2009) and the record low is -4°C (1977).

Koshigaya weather in March

In March, Koshigaya averages a high of 14°C and a low of 6°C. It gets 107 mm of precipitation over about 9 rainy days. The sun is out about 44% of daylight hours. The March record high is 26°C (2013) and the record low is -3°C (1977).

Koshigaya weather in April

In April, Koshigaya averages a high of 19°C and a low of 11°C. It gets 130 mm of precipitation over about 10 rainy days. The sun is out about 40% of daylight hours. The April record high is 29°C (2004) and the record low is 1°C (1988). April is one of the most comfortable months to visit.

Koshigaya weather in May

In May, Koshigaya averages a high of 24°C and a low of 16°C. It gets 126 mm of precipitation over about 10 rainy days. The sun is out about 30% of daylight hours. The May record high is 33°C (2019) and the record low is 8°C (1991). May is one of the most comfortable months to visit.

Koshigaya weather in June

In June, Koshigaya averages a high of 26°C and a low of 19°C. It gets 163 mm of precipitation over about 12 rainy days. The sun is out about 22% of daylight hours. The June record high is 37°C (2022) and the record low is 12°C (1989). June is one of the most comfortable months to visit.

Koshigaya weather in July

In July, Koshigaya averages a high of 30°C and a low of 23°C. It gets 140 mm of precipitation over about 11 rainy days. The sun is out about 26% of daylight hours. The July record high is 39°C (2004) and the record low is 14°C (1976).

Koshigaya weather in August

In August, Koshigaya averages a high of 31°C and a low of 24°C. It gets 136 mm of precipitation over about 8 rainy days. The sun is out about 37% of daylight hours. The August record high is 39°C (1994) and the record low is 18°C (1977).

Koshigaya weather in September

In September, Koshigaya averages a high of 28°C and a low of 21°C. It gets 211 mm of precipitation over about 12 rainy days. The sun is out about 30% of daylight hours. The September record high is 38°C (1984) and the record low is 13°C (2001).

Koshigaya weather in October

In October, Koshigaya averages a high of 22°C and a low of 15°C. It gets 212 mm of precipitation over about 10 rainy days. The sun is out about 41% of daylight hours. The October record high is 33°C (1979) and the record low is 7°C (1970).

Koshigaya weather in November

In November, Koshigaya averages a high of 17°C and a low of 9°C. It gets 93 mm of precipitation over about 7 rainy days. The sun is out about 57% of daylight hours. The November record high is 27°C (1977) and the record low is 1°C (2016). November is one of the most comfortable months to visit.

Koshigaya weather in December

In December, Koshigaya averages a high of 13°C and a low of 4°C. It gets 49 mm of precipitation over about 5 rainy days. The sun is out about 66% of daylight hours. The December record high is 25°C (2004) and the record low is -2°C (2021).

Sunshine, humidity and wind in Koshigaya

December is the sunniest month in Koshigaya, with sunshine about 66% of daylight hours. June is the cloudiest, at 22%. Over the year the sun shines about 43% of daylight hours. Koshigaya is sunnier than 89% of Japan.

Humidity peaks in September at 78% and is lowest in February at 58%.

Koshigaya has about 23 days a year above 32°C. Koshigaya is hotter than 60% of Japan.

First and last freeze in Koshigaya

The first fall freeze in Koshigaya typically comes around December 19, and the last spring freeze around February 17. That leaves a frost-free growing season of about 305 days.

Koshigaya weather records

The hottest temperature on record at the Koshigaya station is 39°C, on July 20, 2004. The coldest is -4°C, on January 17, 1970.

The wettest day on record brought 261 mm of rain, on September 22, 1996.

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

The best time to visit Koshigaya

The most comfortable time to visit is typically April to June and 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 22°C and lows near 15°C.

Koshigaya climate questions

How much rain does Koshigaya get?

Koshigaya gets 1469 mm of precipitation in an average year, over about 103 rainy days.

What is the wettest month in Koshigaya?

October is the wettest month in Koshigaya, with 212 mm. December is the driest, with 49 mm.

How many rainy days does Koshigaya have a year?

Koshigaya has about 103 days with measurable rain in an average year. June has the most, about 12.

What is the hottest month in Koshigaya?

August is the warmest month in Koshigaya, with an average high of 31°C.

What is the coldest month in Koshigaya?

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

What is the record high temperature in Koshigaya?

The record high at the Koshigaya station is 39°C, set on July 20, 2004. The record low is -4°C, on January 17, 1970.

What is the sunniest month in Koshigaya?

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

When is the first frost in Koshigaya?

The first fall freeze in Koshigaya typically comes around December 19. The last spring freeze is around February 17.

What is the best time to visit Koshigaya?

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