Westborough (MA) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Westborough, Massachusetts, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Let's explore the details to provide you with a complete overview.

Westborough has a notably wet climate with abundant precipitation, recording 1227 mm (48 in) of rain/snowfall per year.

Monthly Precipitation Levels

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

Precipitation levels in Westborough remain relatively steady throughout the year. June has the most rain, with 133 mm (5.2 in) over 14 days. In September, this drops slightly to 84 mm (3.3 in), making the city's climate fairly predictable.

June, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 283 hours of sunshine in this period. During the driest month September you can expect a temperature of 24°C (75°F). For more detailed insights into the city's temperatures, visit our Westborough Temperature page.

Westborough's average annual precipitation is 1227 mm (48 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.

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.

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.

Climate change is affecting precipitation patterns worldwide, including Westborough (MA):

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