Siheung Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Siheung, Gyeonggi-do, South Korea. These averages rely on historical data collected over 30 years, from 1990 to 2020. Now, let's explore all the details to give you a full picture.

Siheung experiences significant rain/snowfall throughout the year, averaging 1227 mm (48 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The climate in Siheung shows significant variation throughout the year. Expect 301 mm (12 in) of precipitation during the wettest month July, distributed over 16 rainy days.

In contrast, January offers drier and sunnier days, with around 23 mm (0.9 in) of snow/rainfall over 8 snowy/rainy days.

July, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 161 hours of sunshine in this period. During the driest month January you can expect a temperature of 3°C (37°F). For more detailed insights into the city's temperatures, visit our Siheung Temperature page.

Siheung's average annual precipitation is 1227 mm (48 in). Let's compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

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.

• 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 Siheung's weather, including sunshine hours, humidity levels, and temperature data, visit our Siheung Climate page.