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Toshima, Tokyo Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Toshima, Tokyo?
Toshima, Tokyo gets 1469 mm of precipitation a year over about 103 rainy days. August is the warmest month (average high 31°C) and January the coldest (average low 2°C).
Humid subtropical climate
Toshima, Tokyo has hot summers and chilly winters. Daytime highs range from about 10°C in January to 31°C in August. October is usually the wettest month. The most comfortable time to visit is typically April to June and November, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 3° | 11° |
| Spring | Mar–May | 11° | 19° |
| Summer | Jun–Aug | 22° | 29° |
| Autumn | Sep–Nov | 15° | 22° |
How much rain does Toshima get?
Toshima 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.
Toshima weather by month
Toshima weather in January
In January, Toshima averages a high of 10°C and a low of 2°C. It gets 52 mm of precipitation over about 4 rainy days. Estimated sunshine is 58% of daylight hours, derived from ERA5 cloud cover. The January record high is 20°C (1996) and the record low is -4°C (1970).
Toshima weather in February
In February, Toshima averages a high of 11°C and a low of 3°C. It gets 50 mm of precipitation over about 5 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The February record high is 24°C (2009) and the record low is -4°C (1977).
Toshima weather in March
In March, Toshima averages a high of 14°C and a low of 6°C. It gets 107 mm of precipitation over about 9 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The March record high is 26°C (2013) and the record low is -3°C (1977).
Toshima weather in April
In April, Toshima averages a high of 19°C and a low of 11°C. It gets 130 mm of precipitation over about 10 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. 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.
Toshima weather in May
In May, Toshima averages a high of 24°C and a low of 16°C. It gets 126 mm of precipitation over about 10 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. 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.
Toshima weather in June
In June, Toshima averages a high of 26°C and a low of 19°C. It gets 163 mm of precipitation over about 12 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. 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.
Toshima weather in July
In July, Toshima averages a high of 30°C and a low of 23°C. It gets 140 mm of precipitation over about 11 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The July record high is 39°C (2004) and the record low is 14°C (1976).
Toshima weather in August
In August, Toshima averages a high of 31°C and a low of 24°C. It gets 136 mm of precipitation over about 8 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The August record high is 39°C (1994) and the record low is 18°C (1977).
Toshima weather in September
In September, Toshima averages a high of 28°C and a low of 21°C. It gets 211 mm of precipitation over about 12 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The September record high is 38°C (1984) and the record low is 13°C (2001).
Toshima weather in October
In October, Toshima averages a high of 22°C and a low of 15°C. It gets 212 mm of precipitation over about 10 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The October record high is 33°C (1979) and the record low is 7°C (1970).
Toshima weather in November
In November, Toshima averages a high of 17°C and a low of 9°C. It gets 93 mm of precipitation over about 7 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. 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.
Toshima weather in December
In December, Toshima averages a high of 13°C and a low of 4°C. It gets 49 mm of precipitation over about 5 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The December record high is 25°C (2004) and the record low is -2°C (2021).
Sunshine, humidity and wind in Toshima
December is the sunniest month in Toshima, with estimated sunshine of 64% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 22%. The annual cloud-cover estimate is 42% of daylight hours; it is not a measurement of sunshine duration. Toshima is sunnier than 81% of Japan.
Humidity peaks in September at 79% and is lowest in February at 61%.
Toshima has about 23 days a year above 32°C. Toshima is hotter than 60% of Japan.
First and last freeze in Toshima
The first fall freeze in Toshima typically comes around December 19, and the last spring freeze around February 17. That leaves a frost-free growing season of about 305 days.
Toshima weather records
These records cover TOKYO during 1970–2025. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Toshima station is 39°C, on July 20, 2004. The coldest is -4°C, on January 17, 1970.
The wettest day in the available station history brought 261 mm of precipitation, on September 22, 1996.
43 all-time records have been set at the station since 1970.
The best time to visit Toshima
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.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 2° | 10° | 52 mm | 4 | 64% | 58% | 20° | -4° |
| February | 3° | 11° | 50 mm | 5 | 61% | 56% | 24° | -4° |
| March | 6° | 14° | 107 mm | 9 | 66% | 42% | 26° | -3° |
| April | 11° | 19° | 130 mm | 10 | 68% | 40% | 29° | 1° |
| May | 16° | 24° | 126 mm | 10 | 72% | 29% | 33° | 8° |
| June | 19° | 26° | 163 mm | 12 | 77% | 22% | 37° | 12° |
| July | 23° | 30° | 140 mm | 11 | 78% | 27% | 39° | 14° |
| August | 24° | 31° | 136 mm | 8 | 75% | 39% | 39° | 18° |
| September | 21° | 28° | 211 mm | 12 | 79% | 31% | 38° | 13° |
| October | 15° | 22° | 212 mm | 10 | 75% | 41% | 33° | 7° |
| November | 9° | 17° | 93 mm | 7 | 71% | 55% | 27° | 1° |
| December | 4° | 13° | 49 mm | 5 | 66% | 64% | 25° | -2° |
Station: TOKYO, 9 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2025; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Toshima climate questions
How much rain does Toshima get?
Toshima gets 1469 mm of precipitation in an average year, over about 103 rainy days.
What is the wettest month in Toshima?
October is the wettest month in Toshima, with 212 mm. December is the driest, with 49 mm.
How many rainy days does Toshima have a year?
Toshima has about 103 days with measurable rain in an average year. June has the most, about 12.
What is the hottest month in Toshima?
August is the warmest month in Toshima, with an average high of 31°C.
What is the coldest month in Toshima?
January is the coldest month in Toshima, with an average low of 2°C.
What is the record high temperature in Toshima?
Within the available 1970–2025 station history, the record high at the Toshima 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 Toshima?
December is the sunniest month in Toshima, with estimated sunshine of 64% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Toshima?
The first fall freeze in Toshima typically comes around December 19. The last spring freeze is around February 17.
What is the best time to visit Toshima?
The most comfortable time to visit is typically April to June and November, when daytime highs sit near 22°C.