Yellowstone National Park Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Yellowstone National Park, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Let's now guide you through the details for a complete overview.
Generally, Yellowstone National Park has a moderate amount of precipitation, averaging 738 mm (29 in) of rain/snowfall 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))
Yellowstone National Park can be quite wet during March, receiving approximately 87 mm (3.4 in) of precipitation over 17 snowy days.
In contrast July, experiences much drier conditions, with 27 mm (1.1 in) of rainfall, spread across 9 rainy days.
March, the wettest month, has a maximum daytime temperature of 4°C (39°F). During the driest month July you can expect a temperature of 23°C (73°F). For more detailed insights into the city's temperatures, visit our Yellowstone National Park Temperature page.
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Yellowstone National Park's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Yellowstone National Park spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
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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almost none
Yellowstone National Park vs World: Rainfall Compared
Yellowstone National Park's average annual precipitation is 738 mm (29 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 Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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 Yellowstone National Park's weather, including sunshine hours, humidity levels, and temperature data, visit our Yellowstone National Park Climate page.
