Quick summary: New climate analysis reveals that Juneau, Alaska, is projected to be the wettest US city this summer with nearly 11 inches of expected rainfall, placing local infrastructure and residential properties at an elevated risk of severe flood damage. The research highlights that the combination of heavy precipitation and high temperatures in cities like Nashville and Kissimmee accelerates internal humidity and mould growth, as every single degree of atmospheric warming allows the air to hold roughly 4% more moisture. For public policy and community well-being, these findings emphasise the urgent need for local authorities to upgrade urban drainage systems and for homeowners to secure protective property plans, mitigating the profound financial anxiety and psychological stress associated with sudden climate-induced water damage.
Juneau, Alaska, has been identified as the US city expected to experience the most rainfall this summer, raising concerns about flood risks and property damage across several regions.
The analysis by residential protection plan experts ProGuard draws on historical weather data to forecast summer precipitation patterns across the country.
Top 10 wettest cities
Juneau tops the rankings with 10.98 inches of expected summer rainfall, nearly 25% higher than any other city in America. Despite having the coolest average summer temperature among the top 10 at just 46.6°F, its precipitation level puts residents and property at increased flood risk.
Nashville, Tennessee, places 2nd with 8.79 inches of predicted rainfall and average temperatures of 83.63°F. The city’s mix of heavy rain and heat creates prime conditions for rapid water damage, as higher temperatures accelerate evaporation and increase humidity levels inside homes.
Kissimmee, Florida, ranks 3rd with 8.40 inches of summer rainfall and the highest temperature among the top 10 at 89.12°F. This combination of heavy precipitation and heat makes properties in the area particularly vulnerable to water-related damage and mold growth.
The full top 10 rankings are as follows
- Juneau, Alaska. Average summer temperature 46.60°F. Average summer rainfall 10.98 inches.
- Nashville, Tennessee. Average summer temperature 83.63°F. Average summer rainfall 8.79 inches.
- Kissimmee, Florida. Average summer temperature 89.12°F. Average summer rainfall 8.40 inches.
- Glen Burnie, Maryland. Average summer temperature 80.17°F. Average summer rainfall 8.35 inches.
- Orlando, Florida. Average summer temperature 88.61°F. Average summer rainfall 8.23 inches.
- Baltimore, Maryland. Average summer temperature 79.73°F. Average summer rainfall 8.20 inches.
- Silver Spring, Maryland. Average summer temperature 79.68°F. Average summer rainfall 7.97 inches.
- Arlington, Virginia. Average summer temperature 79.77°F. Average summer rainfall 7.92 inches.
- Alexandria, Virginia. Average summer temperature 80.31°F. Average summer rainfall 7.91 inches.
- St. Charles, Missouri. Average summer temperature 81.09°F. Average summer rainfall 7.91 inches.
Glen Burnie, Maryland, takes 4th place with 8.35 inches of predicted rainfall and average summer temperatures of 80.17°F, conditions that make the area susceptible to dampness and structural wear over time. Orlando, in 5th place, sees 8.23 inches of rainfall combined with 1 of the highest average summer temperatures at 88.61°F, putting thousands of homes and hotel properties at elevated risk from water damage during summer storms.
Maryland has the most cities in the top rankings, with 3 metropolitan areas expecting over 7.9 inches of summer rainfall. Florida and Virginia each place 2 cities in the top 10, suggesting regional patterns in summer precipitation. The study also found that coastal cities do not necessarily receive more rainfall than inland areas, with coastal communities such as Miami, Florida (6.10 inches) and Virginia Beach, Virginia (5.28 inches) placing lower than several landlocked cities.
St. Charles, Missouri, rounds out the top 10 with 7.91 inches of predicted rainfall and temperatures averaging 81.09°F. Its position on the Missouri and Mississippi Rivers can amplify flooding concerns during heavy rainfall periods.
Driest cities
The study reveals a stark contrast between the wettest and driest summer cities. San Jose, California, stands as the driest city in America with just 0.27 inches of predicted precipitation, approximately 40 times less rainfall than Juneau. Other notably dry locations include San Francisco, California (0.54 inches), Kahului, Hawaii (0.76 inches), and Concord, California (0.76 inches).
Western states dominate the driest summer cities list, with Nevada, Washington, and California particularly well represented. Reno, Nevada (1.21 inches), Sparks, Nevada (1.14 inches), and Grand Junction, Colorado (1.16 inches) all land among the 10 driest major US cities. Despite Hawaii’s tropical reputation, several Hawaiian cities also appear among America’s driest summer locations.
Expert warning
Michael Feeney, CEO of ProGuard, commented on the findings: “It is not just about the forecasts; our climate is shifting in ways that make heavy rainfall more intense and more frequent. Scientists estimate that for every 1°F of warming, the air can hold roughly 4% more moisture, which means when it rains, it often pours harder than it used to. For cities like Juneau, where summer rainfall is already projected at nearly 11 inches, that can put homes, infrastructure, and local drainage systems under real stress. We are seeing these kinds of extreme downpours more often across the US, and it is a reminder that homeowners should be prepared for everything from flooded basements to water damage in attics.”
Experts recommend checking drainage systems, reviewing insurance coverage, and staying informed about local forecasts as summer progresses.