Forest Grove Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Forest Grove, Western Australia, Australia. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.

Generally, Forest Grove has a moderate amount of precipitation, averaging 798 mm (31 in) of rainfall annually. However, it does experience a distinct dry season during certain months. Take a look at our detailed charts below to see the seasonal variation.

Monthly Precipitation Levels

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

The climate in Forest Grove shows significant variation throughout the year. Expect 155 mm (6.1 in) of precipitation during the wettest month July, distributed over 17 rainy days.

In contrast, February offers drier and sunnier days, with around 14 mm (0.6 in) of rainfall over 6 rainy days.

July, the wettest month, has a maximum daytime temperature of 17°C (63°F). During the driest month February you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our Forest Grove Temperature page.

Forest Grove's average annual precipitation is 798 mm (31 in). Let's compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.

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.

Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

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 Forest Grove's weather, including sunshine hours, humidity levels, and temperature data, visit our Forest Grove Climate page.