Shimo-suwa Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Shimo-suwa, Nagano Prefecture, Japan. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's explore all the details to give you a full picture.
Shimo-suwa has a relatively rain/snowy climate with high precipitation levels, averaging 1663 mm (65 in) of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Shimo-suwa shows significant variation throughout the year. Expect 203 mm (8 in) of precipitation during the wettest month July, distributed over 22 rainy days.
In contrast, December offers drier and sunnier days, with around 87 mm (3.4 in) of snow/rainfall over 16 snowy/rainy days.
July, the wettest month, has a maximum daytime temperature of 27°C (81°F). The city receives 164 hours of sunshine in this period. During the driest month December you can expect a temperature of 6°C (43°F). For more detailed insights into the city's temperatures, visit our Shimo-suwa Temperature page.
Annual Rainfall in Japan: City Comparison
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
Shimo-suwa vs World: Rainfall Compared
Shimo-suwa's average annual precipitation is 1663 mm (65 in). Let's compare this to some popular worldwide tourist destinations:
Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Shimo-suwa's weather, including sunshine hours, humidity levels, and temperature data, visit our Shimo-suwa Climate page.
