Merrillville (IN) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Merrillville, Indiana, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's break down all the details for a clearer picture.

Merrillville experiences significant rain/snowfall throughout the year, averaging 1096 mm (43 in) of precipitation annually.

Monthly Precipitation Levels

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

The seasons in Merrillville, bring significant changes in precipitation. The wettest month, August, receives high rainfall, with an average of 146 mm (5.7 in) of precipitation. This rainfall is distributed across 11 rainy days.

August, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 280 hours of sunshine in this period. During the driest month November you can expect a temperature of 10°C (50°F). For more detailed insights into the city's temperatures, visit our Merrillville Temperature page.

Merrillville's average annual precipitation is 1096 mm (43 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

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

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

Climate change is affecting precipitation patterns worldwide, including Merrillville (IN):

• 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 Merrillville (IN)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Merrillville (IN) Climate page.