Tillamook (OR) Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Tillamook, Oregon, United States of America. 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.
Tillamook experiences significant rain/snowfall throughout the year, averaging 2170 mm (85 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct dry and rainy season during certain months. You can clearly see this in our monthly precipitation graphs below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Tillamook can be quite wet during December, receiving approximately 361 mm (14 in) of precipitation over 24 rainy days.
In contrast July, experiences much drier conditions, with 25 mm (1 in) of rainfall, spread across 8 rainy days.
December, the wettest month, has a maximum daytime temperature of 10°C (50°F). During the driest month July you can expect a temperature of 20°C (68°F). For more detailed insights into the city's temperatures, visit our Tillamook Temperature page.
Annual Rainfall in the United States of America: City Comparison
The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.
heavy rainfall
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moderate
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Tillamook vs World: Rainfall Compared
Tillamook's average annual precipitation is 2170 mm (85 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.
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.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- 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.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Tillamook (OR)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Tillamook (OR) Climate page.
