Fort Collins (CO) Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Fort Collins (CO). The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Fort Collins maintains relatively dry conditions year-round, recording average annual precipitation of 404 mm.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wet season, May receives substantial rainfall, averaging 71 mm of precipitation, recorded across 12 rainy days.

In contrast, the drier season, January brings less snow/rainfall, with 9.5 mm over 3 snowy/rainy days.

May, the city’s wettest month, has a maximum daytime temperature of 21°C and receives 290 hours of sunshine. During the driest month January you can expect a temperature of 6°C. For more detailed insights into the city’s temperatures, visit our Fort Collins Temperature page.

Annual Precipitation in the United States of America

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.

Amsterdam Precipitation Compared World Wide

Fort Collins’s average annual precipitation is 404 mm. Let’s compare this to some popular worldwide tourist destinations:

Boston, USA, experiences 1238 mm of annual precipitation, including significant snowfall during the winter.

Beijing, China, receives 560 mm of annual precipitation, concentrated in the summer months.

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

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm of annual rainfall, with the heaviest precipitation occurring during September and October.

How is Precipitation Measured?

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.

Interesting weather facts

• 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 Fort Collins (CO)’s weather, including sunshine hours, humidity levels, and temperature data, visit our Fort Collins (CO) Climate page.