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Mito, Ibaraki Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Mito, Ibaraki?
Mito, Ibaraki gets 1250 mm of precipitation a year over about 102 rainy days. August is the warmest month (average high 30°C) and January the coldest (average low -3°C).
Humid subtropical climate
Mito, Ibaraki has hot summers and chilly winters. Daytime highs range from about 9°C in January to 30°C in August. September is usually the wettest month. The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -2° | 10° |
| Spring | Mar–May | 7° | 18° |
| Summer | Jun–Aug | 20° | 28° |
| Autumn | Sep–Nov | 12° | 21° |
How much rain does Mito get?
Mito gets 1250 mm of precipitation in an average year, spread over about 102 days with measurable rain. That is fewer rainy days than 72% of Japan.
September is the wettest month, with 185 mm. December is the driest, with 42 mm. June has the most rainy days, about 12.
The longest dry spell in the last five years lasted 41 days, to February 6, 2026.
From October 2025 to September 2026 Mito got 3982 mm of rain, against a normal of 1250 mm for those months. September 2026 had the most, with 1899 mm.
Mito weather by month
Mito weather in January
In January, Mito averages a high of 9°C and a low of -3°C. It gets 43 mm of precipitation over about 4 rainy days. Estimated sunshine is 59% of daylight hours, derived from ERA5 cloud cover. The January record high is 18°C (1996) and the record low is -11°C (1970).
Mito weather in February
In February, Mito averages a high of 10°C and a low of -2°C. It gets 47 mm of precipitation over about 6 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 -10°C (1984).
Mito weather in March
In March, Mito averages a high of 13°C and a low of 1°C. It gets 93 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 25°C (2007) and the record low is -8°C (1977).
Mito weather in April
In April, Mito averages a high of 18°C and a low of 6°C. It gets 105 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 (2015) and the record low is -3°C (1978). April is one of the most comfortable months to visit.
Mito weather in May
In May, Mito averages a high of 22°C and a low of 12°C. It gets 132 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 2°C (1991). May is one of the most comfortable months to visit.
Mito weather in June
In June, Mito averages a high of 25°C and a low of 17°C. It gets 132 mm of precipitation over about 12 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The June record high is 36°C (2022) and the record low is 9°C (2010). June is one of the most comfortable months to visit.
Mito weather in July
In July, Mito averages a high of 29°C and a low of 21°C. It gets 125 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 38°C (1997) and the record low is 8°C (2026).
Mito weather in August
In August, Mito averages a high of 30°C and a low of 22°C. It gets 103 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 38°C (1996) and the record low is 13°C (1980).
Mito weather in September
In September, Mito averages a high of 27°C and a low of 18°C. It gets 185 mm of precipitation over about 11 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The September record high is 37°C (2000) and the record low is 8°C (1992).
Mito weather in October
In October, Mito averages a high of 21°C and a low of 12°C. It gets 169 mm of precipitation over about 9 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The October record high is 33°C (1979) and the record low is 1°C (1984). October is one of the most comfortable months to visit.
Mito weather in November
In November, Mito averages a high of 16°C and a low of 5°C. It gets 73 mm of precipitation over about 7 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The November record high is 26°C (1977) and the record low is -4°C (1976).
Mito weather in December
In December, Mito averages a high of 12°C and a low of 0°C. It gets 42 mm of precipitation over about 5 rainy days. Estimated sunshine is 63% of daylight hours, derived from ERA5 cloud cover. The December record high is 25°C (2004) and the record low is -8°C (1973).
Sunshine, humidity and wind in Mito
December is the sunniest month in Mito, with estimated sunshine of 63% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 24%. The annual cloud-cover estimate is 42% of daylight hours; it is not a measurement of sunshine duration. Mito is sunnier than 83% of Japan.
Humidity peaks in July at 85% and is lowest in February at 59%.
Mito has about 16 days a year above 32°C. Mito is cooler than 59% of Japan.
First and last freeze in Mito
The first fall freeze in Mito typically comes around November 26, and the last spring freeze around March 30. That leaves a frost-free growing season of about 241 days.
Mito weather records
These records cover MITO during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Mito station is 38°C, on August 15, 1996. The coldest is -11°C, on January 17, 1970.
The wettest day in the available station history brought 287 mm of precipitation, on September 23, 2026.
39 all-time records have been set at the station since 1970.
The best time to visit Mito
The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°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 18°C and lows near 6°C.
Summer (June–August) is hot, with average highs around 28°C and lows near 20°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 21°C and lows near 12°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -3° | 9° | 43 mm | 4 | 61% | 59% | 18° | -11° |
| February | -2° | 10° | 47 mm | 6 | 59% | 56% | 24° | -10° |
| March | 1° | 13° | 93 mm | 9 | 66% | 42% | 25° | -8° |
| April | 6° | 18° | 105 mm | 10 | 68% | 40% | 29° | -3° |
| May | 12° | 22° | 132 mm | 10 | 74% | 29% | 33° | 2° |
| June | 17° | 25° | 132 mm | 12 | 82% | 24% | 36° | 9° |
| July | 21° | 29° | 125 mm | 11 | 85% | 27% | 38° | 8° |
| August | 22° | 30° | 103 mm | 8 | 83% | 39% | 38° | 13° |
| September | 18° | 27° | 185 mm | 11 | 81% | 31% | 37° | 8° |
| October | 12° | 21° | 169 mm | 9 | 73% | 40% | 33° | 1° |
| November | 5° | 16° | 73 mm | 7 | 68% | 56% | 26° | -4° |
| December | 0° | 12° | 42 mm | 5 | 64% | 63% | 25° | -8° |
Station: MITO, 4 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; 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.
Mito climate questions
How much rain does Mito get?
Mito gets 1250 mm of precipitation in an average year, over about 102 rainy days.
What is the wettest month in Mito?
September is the wettest month in Mito, with 185 mm. December is the driest, with 42 mm.
How many rainy days does Mito have a year?
Mito has about 102 days with measurable rain in an average year. June has the most, about 12.
What is the hottest month in Mito?
August is the warmest month in Mito, with an average high of 30°C.
What is the coldest month in Mito?
January is the coldest month in Mito, with an average low of -3°C.
What is the record high temperature in Mito?
Within the available 1970–2026 station history, the record high at the Mito station is 38°C, set on August 15, 1996. The record low is -11°C, on January 17, 1970.
What is the sunniest month in Mito?
December is the sunniest month in Mito, with estimated sunshine of 63% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Mito?
The first fall freeze in Mito typically comes around November 26. The last spring freeze is around March 30.
What is the best time to visit Mito?
The most comfortable time to visit is typically April to June and October, when daytime highs sit near 22°C.