Hakodate Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Hakodate, Hokkaido, Japan. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.
Hakodate has a relatively rain/snowy climate with high precipitation levels, averaging 1399 mm (55 in) of rain/snowfall annually. Despite the high annual total, it does experience a distinct rainy season during certain months. Examine our detailed charts below to understand these seasonal patterns.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, August receives substantial rainfall, averaging 209 mm (8.2 in) of precipitation, recorded across 18 rainy days.
In contrast, the driest month, January brings less snow/rainfall, with 62 mm (2.4 in) over 28 snowy/rainy days.
August, the wettest month, has a maximum daytime temperature of 24°C (75°F). The city receives 150 hours of sunshine in this period. During the driest month January you can expect a temperature of 1°C (34°F). For more detailed insights into the city's temperatures, visit our Hakodate Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Hakodate's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Hakodate spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
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
Hakodate vs World: Rainfall Compared
Hakodate's average annual precipitation is 1399 mm (55 in). Let's compare this to some popular worldwide tourist destinations:
Boston, USA, experiences 1238 mm (49 in) of annual precipitation, including significant snowfall during the 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.
Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.
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.
- 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 Hakodate's weather, including sunshine hours, humidity levels, and temperature data, visit our Hakodate Climate page.
