Oyama, Tochigi Weather by Month and Climate Averages

How much rain does Oyama get?

Oyama gets 1364 mm of precipitation in an average year, spread over about 107 days with measurable rain. That is fewer rainy days than 60% of Japan.

September is the wettest month, with 209 mm. February is the driest, with 31 mm. June has the most rainy days, about 14.

The longest dry spell in the last five years lasted 25 days, to February 5, 2022.

Oyama weather by month

Oyama weather in January

In January, Oyama averages a high of 9°C and a low of -3°C. It gets 32 mm of precipitation over about 4 rainy days. The sun is out about 62% of daylight hours. The January record high is 18°C (1973) and the record low is -12°C (1970).

Oyama weather in February

In February, Oyama averages a high of 10°C and a low of -2°C. It gets 31 mm of precipitation over about 5 rainy days. The sun is out about 58% of daylight hours. The February record high is 23°C (1993) and the record low is -12°C (1970).

Oyama weather in March

In March, Oyama averages a high of 13°C and a low of 2°C. It gets 79 mm of precipitation over about 8 rainy days. The sun is out about 44% of daylight hours. The March record high is 27°C (2013) and the record low is -10°C (1970).

Oyama weather in April

In April, Oyama averages a high of 19°C and a low of 7°C. It gets 109 mm of precipitation over about 10 rainy days. The sun is out about 41% of daylight hours. The April record high is 30°C (2018) and the record low is -3°C (1987). April is one of the most comfortable months to visit.

Oyama weather in May

In May, Oyama averages a high of 24°C and a low of 12°C. It gets 133 mm of precipitation over about 10 rainy days. The sun is out about 30% of daylight hours. The May record high is 34°C (2019) and the record low is 2°C (1972). May is one of the most comfortable months to visit.

Oyama weather in June

In June, Oyama averages a high of 26°C and a low of 17°C. It gets 168 mm of precipitation over about 14 rainy days. The sun is out about 22% of daylight hours. The June record high is 38°C (2011) and the record low is 9°C (1978). June is one of the most comfortable months to visit.

Oyama weather in July

In July, Oyama averages a high of 29°C and a low of 21°C. It gets 182 mm of precipitation over about 14 rainy days. The sun is out about 24% of daylight hours. The July record high is 39°C (1997) and the record low is 11°C (1976).

Oyama weather in August

In August, Oyama averages a high of 31°C and a low of 22°C. It gets 157 mm of precipitation over about 11 rainy days. The sun is out about 33% of daylight hours. The August record high is 38°C (2020) and the record low is 13°C (1976).

Oyama weather in September

In September, Oyama averages a high of 27°C and a low of 18°C. It gets 209 mm of precipitation over about 12 rainy days. The sun is out about 27% of daylight hours. The September record high is 37°C (2000) and the record low is 7°C (1992).

Oyama weather in October

In October, Oyama averages a high of 22°C and a low of 12°C. It gets 167 mm of precipitation over about 9 rainy days. The sun is out about 40% of daylight hours. The October record high is 33°C (2018) and the record low is 1°C (1970). October is one of the most comfortable months to visit.

Oyama weather in November

In November, Oyama averages a high of 16°C and a low of 5°C. It gets 60 mm of precipitation over about 6 rainy days. The sun is out about 58% of daylight hours. The November record high is 25°C (1990) and the record low is -6°C (1973).

Oyama weather in December

In December, Oyama averages a high of 11°C and a low of -1°C. It gets 37 mm of precipitation over about 4 rainy days. The sun is out about 66% of daylight hours. The December record high is 24°C (2004) and the record low is -9°C (1973).

Sunshine, humidity and wind in Oyama

December is the sunniest month in Oyama, with sunshine about 66% of daylight hours. June is the cloudiest, at 22%. Over the year the sun shines about 42% of daylight hours. Oyama is sunnier than 83% of Japan.

Humidity peaks in July at 80% and is lowest in February at 58%.

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

First and last freeze in Oyama

The first fall freeze in Oyama typically comes around November 26, and the last spring freeze around April 2. That leaves a frost-free growing season of about 238 days.

Oyama weather records

The hottest temperature on record at the Oyama station is 39°C, on July 5, 1997. The coldest is -12°C, on January 17, 1970.

The wettest day on record brought 266 mm of rain, on October 12, 2019.

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

The best time to visit Oyama

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 10°C and lows near -2°C.

Spring (March–May) is mild, with average highs around 19°C and lows near 7°C.

Summer (June–August) is hot, with average highs around 29°C and lows near 20°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 22°C and lows near 12°C.

Oyama climate questions

How much rain does Oyama get?

Oyama gets 1364 mm of precipitation in an average year, over about 107 rainy days.

What is the wettest month in Oyama?

September is the wettest month in Oyama, with 209 mm. February is the driest, with 31 mm.

How many rainy days does Oyama have a year?

Oyama has about 107 days with measurable rain in an average year. June has the most, about 14.

What is the hottest month in Oyama?

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

What is the coldest month in Oyama?

January is the coldest month in Oyama, with an average low of -3°C.

What is the record high temperature in Oyama?

The record high at the Oyama station is 39°C, set on July 5, 1997. The record low is -12°C, on January 17, 1970.

What is the sunniest month in Oyama?

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

When is the first frost in Oyama?

The first fall freeze in Oyama typically comes around November 26. The last spring freeze is around April 2.

What is the best time to visit Oyama?

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