Sayama, Saitama Weather by Month and Climate Averages

How much rain does Sayama get?

Sayama gets 1153 mm of precipitation in an average year, spread over about 93 days with measurable rain. That is fewer rainy days than 88% of Japan.

September is the wettest month, with 187 mm. February is the driest, with 29 mm. June has the most rainy days, about 12.

The longest dry spell in the last five years lasted 27 days, to January 12, 2024.

Sayama weather by month

Sayama weather in January

In January, Sayama averages a high of 10°C and a low of -1°C. It gets 32 mm of precipitation over about 3 rainy days. The sun is out about 60% of daylight hours. The January record high is 19°C (1996) and the record low is -8°C (1976).

Sayama weather in February

In February, Sayama averages a high of 11°C and a low of -1°C. It gets 29 mm of precipitation over about 5 rainy days. The sun is out about 56% of daylight hours. The February record high is 24°C (1993) and the record low is -7°C (1977).

Sayama weather in March

In March, Sayama averages a high of 14°C and a low of 3°C. It gets 61 mm of precipitation over about 7 rainy days. The sun is out about 42% of daylight hours. The March record high is 27°C (1998) and the record low is -8°C (1977).

Sayama weather in April

In April, Sayama averages a high of 20°C and a low of 8°C. It gets 82 mm of precipitation over about 8 rainy days. The sun is out about 39% of daylight hours. The April record high is 31°C (2015) and the record low is -1°C (1981). April is one of the most comfortable months to visit.

Sayama weather in May

In May, Sayama averages a high of 25°C and a low of 13°C. It gets 100 mm of precipitation over about 9 rainy days. The sun is out about 29% of daylight hours. The May record high is 36°C (2019) and the record low is 4°C (1993). May is one of the most comfortable months to visit.

Sayama weather in June

In June, Sayama averages a high of 27°C and a low of 18°C. It gets 141 mm of precipitation over about 12 rainy days. The sun is out about 20% of daylight hours. The June record high is 40°C (2011) and the record low is 10°C (1981).

Sayama weather in July

In July, Sayama averages a high of 31°C and a low of 22°C. It gets 135 mm of precipitation over about 12 rainy days. The sun is out about 26% of daylight hours. The July record high is 41°C (2018) and the record low is 12°C (1976).

Sayama weather in August

In August, Sayama averages a high of 32°C and a low of 23°C. It gets 146 mm of precipitation over about 9 rainy days. The sun is out about 37% of daylight hours. The August record high is 41°C (2007) and the record low is 16°C (1976).

Sayama weather in September

In September, Sayama averages a high of 28°C and a low of 19°C. It gets 187 mm of precipitation over about 11 rainy days. The sun is out about 29% of daylight hours. The September record high is 39°C (2000) and the record low is 11°C (1992).

Sayama weather in October

In October, Sayama averages a high of 22°C and a low of 13°C. It gets 164 mm of precipitation over about 9 rainy days. The sun is out about 40% of daylight hours. The October record high is 34°C (2018) and the record low is 3°C (1971). October is one of the most comfortable months to visit.

Sayama weather in November

In November, Sayama averages a high of 17°C and a low of 7°C. It gets 46 mm of precipitation over about 5 rainy days. The sun is out about 56% of daylight hours. The November record high is 27°C (2023) and the record low is -2°C (1971). November is one of the most comfortable months to visit.

Sayama weather in December

In December, Sayama averages a high of 12°C and a low of 1°C. It gets 30 mm of precipitation over about 4 rainy days. The sun is out about 66% of daylight hours. The December record high is 26°C (2004) and the record low is -7°C (1976).

Sunshine, humidity and wind in Sayama

December is the sunniest month in Sayama, with sunshine about 66% of daylight hours. June is the cloudiest, at 20%. Over the year the sun shines about 42% of daylight hours. Sayama is sunnier than 76% of Japan.

Humidity peaks in September at 80% and is lowest in February at 59%.

Sayama has about 37 days a year above 32°C. Sayama is hotter than 93% of Japan.

First and last freeze in Sayama

The first fall freeze in Sayama typically comes around December 6, and the last spring freeze around March 19. That leaves a frost-free growing season of about 262 days.

Sayama weather records

The hottest temperature on record at the Sayama station is 41°C, on July 23, 2018. The coldest is -8°C, on January 22, 1976.

The wettest day on record brought 301 mm of rain, on September 12, 1982.

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

The best time to visit Sayama

The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.

Winter (December–February) is chilly, with average highs around 11°C and lows near 0°C.

Spring (March–May) is mild, with average highs around 20°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.

Sayama climate questions

How much rain does Sayama get?

Sayama gets 1153 mm of precipitation in an average year, over about 93 rainy days.

What is the wettest month in Sayama?

September is the wettest month in Sayama, with 187 mm. February is the driest, with 29 mm.

How many rainy days does Sayama have a year?

Sayama has about 93 days with measurable rain in an average year. June has the most, about 12.

What is the hottest month in Sayama?

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

What is the coldest month in Sayama?

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

What is the record high temperature in Sayama?

The record high at the Sayama station is 41°C, set on July 23, 2018. The record low is -8°C, on January 22, 1976.

What is the sunniest month in Sayama?

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

When is the first frost in Sayama?

The first fall freeze in Sayama typically comes around December 6. The last spring freeze is around March 19.

What is the best time to visit Sayama?

The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.