Itoigawa Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows both the average monthly rainfall and the number of rainy days in Itoigawa, Niigata Prefecture, Japan. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let’s break down all the details for a clearer picture.
Itoigawa experiences significant rain/snowfall throughout the year, averaging 2801 mm of precipitation annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
The amount of precipitation varies moderately throughout the year. The wettest month, January, sees around 309 mm of snow/rainfall, perfect for those who enjoy a bit of snow/rain now and then. The driest month, May, still receives a respectable 147 mm of rainfall.
January, the wettest month, has a maximum daytime temperature of 4°C. The city receives 67 hours of sunshine in this period. During the driest month May you can expect a temperature of 19°C. For more detailed insights into the city’s temperatures, visit our Itoigawa Temperature page.
Annual Precipitation in Japan
The map below shows the annual precipitation across Japan. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Amsterdam Precipitation Compared World Wide
Itoigawa’s average annual precipitation is 2801 mm. Let’s compare this to some popular worldwide tourist destinations:
Chicago, USA, sees an annual precipitation of 1062 mm, with rain and snow contributing to its humid climate.
Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.
In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
How is Precipitation Measured?
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Global Precipitation Patterns
Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm of rain annually.
Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.
Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.
Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm, with some areas receiving as little as 50 mm annually.
For more detailed information about Itoigawa’s weather, including sunshine hours, humidity levels, and temperature data, visit our Itoigawa Climate page.
Current rainfall in Itoigawa
