Tomakomai, Hokkaido Weather by Month and Climate Averages

How much rain does Tomakomai get?

Tomakomai gets 1135 mm of precipitation in an average year, spread over about 120 days with measurable rain. That is more rainy days than 57% of Japan.

August is the wettest month, with 177 mm. February is the driest, with 34 mm. August has the most rainy days, about 12.

The longest dry spell in the last five years lasted 14 days, to January 9, 2023.

Tomakomai weather by month

Tomakomai weather in January

In January, Tomakomai averages a high of 0°C and a low of -9°C. It gets 38 mm of precipitation over about 10 rainy days. The sun is out about 40% of daylight hours. The January record high is 9°C (1995) and the record low is -19°C (2000).

Tomakomai weather in February

In February, Tomakomai averages a high of 1°C and a low of -9°C. It gets 34 mm of precipitation over about 10 rainy days. The sun is out about 39% of daylight hours. The February record high is 13°C (2024) and the record low is -21°C (1977).

Tomakomai weather in March

In March, Tomakomai averages a high of 4°C and a low of -4°C. It gets 51 mm of precipitation over about 11 rainy days. The sun is out about 44% of daylight hours. The March record high is 16°C (2021) and the record low is -15°C (2005).

Tomakomai weather in April

In April, Tomakomai averages a high of 10°C and a low of 1°C. It gets 69 mm of precipitation over about 10 rainy days. The sun is out about 44% of daylight hours. The April record high is 22°C (2018) and the record low is -9°C (1978).

Tomakomai weather in May

In May, Tomakomai averages a high of 14°C and a low of 6°C. It gets 126 mm of precipitation over about 10 rainy days. The sun is out about 38% of daylight hours. The May record high is 27°C (1999) and the record low is -2°C (2001).

Tomakomai weather in June

In June, Tomakomai averages a high of 18°C and a low of 11°C. It gets 105 mm of precipitation over about 9 rainy days. The sun is out about 32% of daylight hours. The June record high is 31°C (2010) and the record low is 3°C (1972). June is one of the most comfortable months to visit.

Tomakomai weather in July

In July, Tomakomai averages a high of 22°C and a low of 16°C. It gets 150 mm of precipitation over about 11 rainy days. The sun is out about 30% of daylight hours. The July record high is 34°C (2022) and the record low is 7°C (1976). July is one of the most comfortable months to visit.

Tomakomai weather in August

In August, Tomakomai averages a high of 24°C and a low of 18°C. It gets 177 mm of precipitation over about 12 rainy days. The sun is out about 27% of daylight hours. The August record high is 36°C (2007) and the record low is 9°C (1971).

Tomakomai weather in September

In September, Tomakomai averages a high of 22°C and a low of 13°C. It gets 155 mm of precipitation over about 10 rainy days. The sun is out about 32% of daylight hours. The September record high is 29°C (2019) and the record low is 3°C (2017). September is one of the most comfortable months to visit.

Tomakomai weather in October

In October, Tomakomai averages a high of 16°C and a low of 6°C. It gets 103 mm of precipitation over about 9 rainy days. The sun is out about 43% of daylight hours. The October record high is 27°C (2021) and the record low is -4°C (1970).

Tomakomai weather in November

In November, Tomakomai averages a high of 9°C and a low of -1°C. It gets 74 mm of precipitation over about 9 rainy days. The sun is out about 42% of daylight hours. The November record high is 21°C (2023) and the record low is -11°C (2016).

Tomakomai weather in December

In December, Tomakomai averages a high of 3°C and a low of -6°C. It gets 53 mm of precipitation over about 9 rainy days. The sun is out about 44% of daylight hours. The December record high is 18°C (1998) and the record low is -16°C (1985).

Sunshine, humidity and wind in Tomakomai

March is the sunniest month in Tomakomai, with sunshine about 44% of daylight hours. August is the cloudiest, at 27%. Over the year the sun shines about 38% of daylight hours. Tomakomai is cloudier than 53% of Japan.

Humidity peaks in July at 88% and is lowest in April at 72%.

First and last freeze in Tomakomai

The first fall freeze in Tomakomai typically comes around October 28, and the last spring freeze around April 26. That leaves a frost-free growing season of about 185 days.

Tomakomai weather records

The hottest temperature on record at the Tomakomai station is 36°C, on August 15, 2007. The coldest is -21°C, on February 2, 1977.

The wettest day on record brought 196 mm of rain, on August 26, 1987.

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

The best time to visit Tomakomai

The most comfortable time to visit is typically June to July and September, when daytime highs sit near 20°C.

Winter (December–February) is cold, with average highs around 1°C and lows near -8°C.

Spring (March–May) is chilly, with average highs around 10°C and lows near 1°C.

Summer (June–August) is warm, with average highs around 21°C and lows near 15°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 16°C and lows near 6°C.

Tomakomai climate questions

How much rain does Tomakomai get?

Tomakomai gets 1135 mm of precipitation in an average year, over about 120 rainy days.

What is the wettest month in Tomakomai?

August is the wettest month in Tomakomai, with 177 mm. February is the driest, with 34 mm.

How many rainy days does Tomakomai have a year?

Tomakomai has about 120 days with measurable rain in an average year. August has the most, about 12.

What is the hottest month in Tomakomai?

August is the warmest month in Tomakomai, with an average high of 24°C.

What is the coldest month in Tomakomai?

January is the coldest month in Tomakomai, with an average low of -9°C.

What is the record high temperature in Tomakomai?

The record high at the Tomakomai station is 36°C, set on August 15, 2007. The record low is -21°C, on February 2, 1977.

What is the sunniest month in Tomakomai?

March is the sunniest month in Tomakomai, with sunshine about 44% of daylight hours. August is the cloudiest.

When is the first frost in Tomakomai?

The first fall freeze in Tomakomai typically comes around October 28. The last spring freeze is around April 26.

What is the best time to visit Tomakomai?

The most comfortable time to visit is typically June to July and September, when daytime highs sit near 20°C.