Pleasant Hill (CA) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Pleasant Hill, California, United States of America. 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.

Pleasant Hill maintains relatively dry conditions year-round, with an average annual precipitation of 421 mm (17 in). However, it does have a distinct dry season during certain months, creating distinct seasonal patterns visible in our monthly breakdown below.

Monthly Precipitation Levels

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

The climate in Pleasant Hill shows significant variation throughout the year. Expect 89 mm (3.5 in) of precipitation during the wettest month December, distributed over 12 rainy days.

In contrast, July offers drier and sunnier days, with around 0.1 mm (0 in) of rainfall over 0 rainy days.

December, the wettest month, has a maximum daytime temperature of 14°C (57°F). The city receives 160 hours of sunshine in this period. During the driest month July you can expect a temperature of 30°C (86°F). For more detailed insights into the city's temperatures, visit our Pleasant Hill Temperature page.

Pleasant Hill's average annual precipitation is 421 mm (17 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.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

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

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.

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