Williamstown (NJ) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Williamstown, New Jersey, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Let's now guide you through the details for a complete overview.

Williamstown has a notably wet climate with abundant precipitation, recording 1267 mm (50 in) of rain/snowfall per year.

Monthly Precipitation Levels

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

While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 139 mm (5.5 in) of precipitation, spread over 13 rainy days.

In contrast, February experiences a drier climate, with about 77 mm (3 in) of rainfall spread across 10 rainy days.

June, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 272 hours of sunshine in this period. During the driest month February you can expect a temperature of 6°C (43°F). For more detailed insights into the city's temperatures, visit our Williamstown Temperature page.

Williamstown's average annual precipitation is 1267 mm (50 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.

Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

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 Williamstown (NJ):

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