Rainiest States in the USA, Visualized
Which U.S. states get the most rain each year? The answer is not always the state people expect.
This guide ranks the rainiest states in America by average annual precipitation, then visualizes that rain in a more intuitive way: as the height of water that would collect above the ground if a full year of precipitation stayed in place.
Rainfall numbers can be hard to imagine. A state receiving 1,618 mm of precipitation per year sounds scientific, but what does that actually mean?
One useful way to picture it is this: if all the rain and snow-water equivalent that fell over a year collected evenly on flat ground and did not drain, evaporate, or soak in, the water would stand 1,618 mm high. That is about 1.62 meters, or taller than many people’s shoulders.
This makes state rainfall easier to compare. Hawaii, the wettest state overall, would have a water layer about 1.62 meters high. Nevada, the driest state, would have only about 241 mm, or 24 cm.
Important note
These rankings use average annual precipitation, which includes rainfall and snowfall measured as liquid water equivalent. So this is technically a “wettest states” ranking, even though most people search for “rainiest states.”
Top 10 Rainiest States in the USA
Based on state-wide average annual precipitation, Hawaii ranks first, followed by Louisiana, Mississippi, Alabama, and Florida. The top of the list is dominated by tropical moisture, Gulf Coast humidity, humid subtropical weather, and mountain-driven rainfall.
| Rank | State | Annual Precipitation | Rain Height | Why It Is So Wet |
|---|---|---|---|---|
| 1 | Hawaii | 63.7 inches | 1,618 mm | Ocean moisture, trade winds, and mountain-driven rainfall |
| 2 | Louisiana | 60.1 inches | 1,527 mm | Gulf moisture, thunderstorms, tropical systems, and humid climate |
| 3 | Mississippi | 59.0 inches | 1,499 mm | Warm Gulf air, frequent storms, and humid subtropical weather |
| 4 | Alabama | 58.3 inches | 1,481 mm | Gulf influence, thunderstorms, and heavy rain systems |
| 5 | Florida | 54.5 inches | 1,384 mm | Summer thunderstorms, tropical moisture, sea breezes, and hurricanes |
| 6 | Tennessee | 54.2 inches | 1,377 mm | Moist air, storms, and varied terrain across the state |
| 7 | Georgia | 50.7 inches | 1,288 mm | Humid climate, Gulf and Atlantic moisture, and thunderstorms |
| 8 | Arkansas | 50.6 inches | 1,285 mm | Southern storm tracks and humid air masses |
| 9 | Connecticut | 50.3 inches | 1,278 mm | Coastal storms, nor’easters, and year-round precipitation |
| 9 | North Carolina | 50.3 inches | 1,278 mm | Atlantic moisture, mountain rainfall, and tropical systems |
Click to reveal: Why does Hawaii rank #1?
Hawaii ranks first because moist ocean air is pushed upward by mountains. As air rises, it cools, condenses, and releases rain. This creates extremely wet windward areas, even though some leeward parts of Hawaii are much drier.
Rainfall Height Visualizer: How High Would the Rain Stand?
Annual precipitation is usually reported in inches or millimeters, but those numbers are easier to understand as height. If one year of precipitation collected evenly on the ground, the depth of that water would equal the annual rainfall measurement.
Choose any state below to compare it directly with the wettest state, Hawaii, and the driest state, Nevada.
What this means
Florida receives about 1,384 mm of precipitation per year. If that water collected evenly on flat ground, it would stand about 1.38 meters high.
This is why annual precipitation is easier to understand as depth: 1 mm of rain means 1 liter of water spread over each square meter of ground.
Why the Southeast Dominates the Rainiest States List
After Hawaii, the list is dominated by the South and Southeast: Louisiana, Mississippi, Alabama, Florida, Tennessee, Georgia, Arkansas, and North Carolina.
This is not random. The Southeast sits close to major moisture sources, especially the Gulf of Mexico and the Atlantic Ocean. Warm air can hold more moisture, and when that humid air rises into thunderstorms, fronts, tropical storms, or mountain slopes, it can produce heavy rainfall.
This also explains why rain in the Southeast often feels different from rain in the Pacific Northwest. In places like Florida, Alabama, and Louisiana, rain can arrive as intense downpours, especially in warm months. In the Pacific Northwest, rain may be lighter but more persistent, creating a different kind of “rainy” feeling.
For more on sudden heavy rain, read: Sudden Rainstorms Explained.
Why Seattle Is Not on This List
Many people assume Washington would rank near the top because Seattle has such a rainy reputation.
But state-wide annual precipitation rankings do not work the same way as city reputation. Washington averages around 38.4 inches, or about 975 mm, of precipitation statewide. That is far below the wettest Gulf Coast and Southeast states.
Seattle feels rainy partly because of frequent cloudy, damp, drizzly days. But “rainy feeling” and “total annual precipitation” are not the same thing.
Click to reveal: How can Seattle feel rainy but not rank as one of the wettest states?
A place can feel rainy because it has many damp or cloudy days, even if the total amount of precipitation is not extremely high. Seattle is famous for frequent light rain and cloudy weather, while many Southern cities get heavier downpours in fewer events.
For a deeper explanation, read: Rainfall vs Rainy Days: Why Some Places Feel Wetter Than Others.
Statewide Rainfall Can Hide Big Local Differences
State averages are useful, but they can also hide huge local differences.
Hawaii is the best example. The state ranks first overall, but not every part of Hawaii is equally wet. Windward mountain areas can receive enormous rainfall, while leeward coastal areas may be much drier.
The same idea applies to other states. North Carolina includes wet mountain zones and coastal storm exposure. Florida includes regions with intense summer thunderstorms and areas where rain patterns vary by season. California has wet northern mountains and very dry southern deserts, which is why the statewide average can be misleading.
So when reading a rain ranking, always ask:
- Is this a statewide average?
- Is this city-specific rainfall?
- Is this total precipitation or rainy days?
- Does it include snow as liquid-equivalent precipitation?
- Are there large mountains, coasts, or deserts inside the state?
What the Rainiest States Mean for Everyday Life
Living in a rainy state does not always mean carrying a huge storm umbrella every day. It depends on the type of rain.
In Hawaii and Florida, rain can be sudden, tropical, and mixed with sun. A lightweight daily-carry umbrella can be more useful than a bulky umbrella left at home.
In Louisiana, Mississippi, and Alabama, heavy downpours and thunderstorms can appear quickly, especially in humid months. A compact umbrella that fits in a bag or car can be a practical backup.
In Connecticut and other northeastern states, rain often comes from seasonal storms, coastal systems, and nor’easters. Wind and sideways rain may matter just as much as total rainfall.
For windy rain, read: Why Wind Makes Rain Worse.
Breliio note
For rainy states with sudden showers, a lightweight umbrella like Breliio Air makes sense because it is easy to keep with you. For car-heavy rainy areas, a reverse-fold umbrella like Breliio Origin can be more convenient because it helps contain the wet side when getting into a car or building.
The Top 5 Rainiest States, Explained
Hawaii
Average annual precipitation: 1,618 mm / 63.7 inches
Hawaii’s rain is shaped by ocean moisture, trade winds, and steep mountains. Moist air rises over the islands, cools, condenses, and drops rain, especially on windward slopes.
Louisiana
Average annual precipitation: 1,527 mm / 60.1 inches
Louisiana is deeply influenced by Gulf moisture. Humid air, thunderstorms, tropical systems, and slow-moving rain events help keep annual precipitation very high.
Mississippi
Average annual precipitation: 1,499 mm / 59.0 inches
Mississippi has a humid subtropical climate with frequent rainfall, thunderstorms, and Gulf-influenced weather patterns.
Alabama
Average annual precipitation: 1,481 mm / 58.3 inches
Alabama receives abundant rainfall from Gulf moisture, thunderstorms, frontal systems, and occasional tropical weather.
Florida
Average annual precipitation: 1,384 mm / 54.5 inches
Florida’s rainfall is heavily shaped by summer thunderstorms, sea-breeze collisions, tropical moisture, and hurricane-season systems.
The 1-Meter Club
Many eastern states: over 1,000 mm/year
Many states in the eastern half of the country receive more than 1 meter of precipitation per year. That is a useful way to understand how wet the humid East can be compared with the dry interior West.
Mini Quiz: Do You Know America’s Rainiest States?
1. Which state ranks as the rainiest overall?
2. What does 1 mm of rain mean?
3. Why can Seattle feel rainy even if Washington is not near the top?
Final Thoughts
The rainiest states in the USA are not just the places with the grayest skies. They are the states that receive the most total precipitation over a typical year.
Hawaii ranks first, but Louisiana, Mississippi, and Alabama are surprisingly close. Florida, Tennessee, Georgia, Arkansas, Connecticut, and North Carolina round out the top group, showing how much the South, Southeast, Gulf Coast, and Atlantic-influenced states dominate America’s wettest rankings.
The biggest lesson is that rain can be measured in different ways. Total rainfall, rainy days, storm intensity, and “how rainy a place feels” are related, but not identical.
That is why visualizing rainfall as height helps. When you imagine each state’s annual rain as a layer of water sitting above the ground, the scale of America’s wettest and driest states becomes much easier to understand.
References
- Current Results. “Average Annual Precipitation by USA State.” Includes state-wide average annual precipitation values and rankings, based on NOAA National Climatic Data Center station data from 1971 to 2000. Current Results.
- Current Results. “Rainiest States in America.” Explains Hawaii’s rainfall patterns, the top rainiest states, and seasonal wetness differences. Current Results.
- NOAA National Centers for Environmental Information. “U.S. Climate Normals.” Explains long-term climate normals and how they describe typical climate conditions. NOAA NCEI.
- NOAA Climate.gov. “New maps of annual average temperature and precipitation from the U.S. Climate Normals.” Explains NOAA’s 1991–2020 Climate Normals as the updated baseline for average U.S. climate. NOAA Climate.gov.
