American Canyon (CA) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in American Canyon, California, United States of America. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Now, let's explore all the details to give you a full picture.

With annual rainfall averaging 498 mm (20 in), American Canyon maintains relatively low precipitation levels throughout the seasons. However, it does have a distinct dry season during certain months, creating distinct patterns as demonstrated in our detailed graph below.

Monthly Precipitation Levels

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

The climate in American Canyon shows significant variation throughout the year. Expect 101 mm (4 in) of precipitation during the wettest month December, distributed over 12 rainy days.

In contrast, August 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 August you can expect a temperature of 27°C (81°F). For more detailed insights into the city's temperatures, visit our American Canyon Temperature page.

American Canyon's average annual precipitation is 498 mm (20 in). Let's compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

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.

Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm (118 in) of rain annually.

Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm (9.8 in) of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.

Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.

Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm (7.9 in), with some areas receiving as little as 50 mm (2 in) annually.

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