State-by-State Breakdown of America’s Deadliest Driving Months

Most drivers assume the most dangerous time to be on the road is easy to spot. Holiday weekends, summer road trips, winter storms, and major travel periods tend to dominate conversations about traffic safety. Yet fatal crashes don’t always follow the patterns people expect.

When it comes to deadly crashes, there isn’t one month that stands out everywhere. Some states see their worst crashes during the busy summer travel season, while others don’t hit their peak until the fall. And once you start looking at things like impaired driving, speeding, distracted driving, and pedestrian crashes, it becomes clear that each follows a different pattern throughout the year.

To better understand when roadway risks are highest, Sweet James examined state-by-state fatal crash data, identifying the deadliest month in every state across several categories of fatal crashes. The findings reveal a country where road danger shifts throughout the calendar year, often in surprising ways.

October Emerges as America’s Deadliest Driving Month

There were 36,297 fatal motor vehicle crashes across the United States in 2024. October recorded the highest total with 3,369 fatal crashes, followed closely by August with 3,342 and September with 3,277.

October also stood out when looking at individual states. It was the deadliest month in 24 states, more than any other month in the analysis. By comparison, April and July ranked first in seven states each, while June and August led in five. Overall, the data shows fatal crashes were most likely to peak during the stretch between summer and fall.

Although October may not have been the deadliest month in all cases, it is clearly more common compared to any other month. October came in first in ten out of sixteen southern states.

On the other hand, September was more prevalent in the Midwest, while the Northeast was evenly distributed between July and October. This is an indication that fatalities on the roads result from a number of different influences that are location-specific.

The states with the highest October fatality rates weren’t necessarily the ones with the largest populations. Wyoming ranked first at 2.04 fatalities per 100,000 residents, followed by Mississippi, Montana, South Carolina, and Alabama. Most of these states have extensive rural highways and smaller populations, which means even relatively small increases in fatal crashes can result in much higher per-capita fatality rates.

The lowest October fatality rates were found in the District of Columbia, Massachusetts, Rhode Island, New York, and Utah. Massachusetts has also consistently ranked among the safest states for drivers in national traffic safety studies, illustrating just how much roadway risk can vary from one state to the next.

Why Fall Continues to Be So Dangerous

The dominance of October becomes more understandable when viewed alongside broader driving trends.

CARFAX reports that roughly 72% of U.S. drivers live in states where fall represents the peak season for accident damage. One major factor is diminishing daylight. Although nighttime driving accounts for only a fraction of total travel, crash risks increase substantially after dark. As the days grow shorter during October and November, more drivers find themselves commuting during low-light conditions.

Conditions on the road start to change as well, since wet leaves can reduce tire traction, increasing the risk of skidding and reduced vehicle control. Additionally, there is an increase in deer sightings due to the breeding season. According to CARFAX, almost half of all deer-related accidents occur from October to December.

The result is a convergence of risks that may not receive the same attention as major holiday travel periods but appear repeatedly throughout fatal crash data.

DUI Fatalities Peak Around the End of Summer

Fatal crashes involving impaired drivers followed a different pattern than overall traffic fatalities.

There were 5,477 fatal crashes involving a driver under the influence of alcohol, drugs, or medication in 2024. September recorded the highest total nationwide with 534 crashes, followed by June with 519 and August with 509. Looking state by state, September was the deadliest month for DUI-related crashes in 18 states, while June ranked first in another 16.

The concentration of DUI crashes during late summer and early fall stands out. While overall fatal crashes were most likely to peak in October, impaired-driving crashes were far more concentrated around months that tend to bring more travel, gatherings, and holiday celebrations.

Tennessee recorded the highest DUI fatal crash rate in the country, followed by West Virginia, Oregon, Alaska, and Connecticut. Several of the states at the top of the rankings saw their deadliest DUI month fall in June, suggesting the start of summer can be just as dangerous for impaired driving as the months that follow.

Where Football Season and DUI Risk Overlap

One of the more interesting patterns in the data is how closely DUI peaks align with the beginning of football season.

Labor Day weekend, which coincides with the start of the NFL calendar, has historically carried a fatal DUI crash risk that is 53% higher than the daily average. National analyses have also found that fall accounts for roughly 26% of all DUI-related deaths, second only to summer. The overlap places much of the football season squarely within one of the most dangerous periods of the year for impaired driving.

National Highway Traffic Safety Administration data shows that alcohol-impaired crashes continue to account for roughly 30% of all traffic fatalities nationwide. In 2024 alone, 11,904 people were killed in alcohol-impaired crashes, the equivalent of one death every 44 minutes.

September’s prominence in the rankings suggests that roadway risks tied to alcohol don’t fade when summer ends. In many states, they remain elevated well into the fall.

Why Speeding Fatalities Surge Before Summer Begins

If October dominated the overall rankings and September led DUI crashes, speeding produced perhaps the clearest seasonal trend in the entire study.

May was the deadliest month for speeding-related fatal crashes in 33 states. No other month came close. Nationwide, speeding was involved in 10,203 fatal crashes in 2024, with May recording the highest monthly total at 962 crashes. September and August followed closely behind.

Tennessee recorded the highest speeding-related fatal crash rate in the country at 1.63 per 100,000 residents, followed by Oregon, Wyoming, Mississippi, Montana, and South Carolina. Many of these states have long stretches of rural highways where drivers travel longer distances at higher speeds, conditions that can make serious crashes even deadlier.

May showed up again and again in the speeding data. That’s before the busiest part of summer arrives, but it does coincide with the start of the period safety groups refer to as the “100 Deadliest Days.”

The Month School Lets Out

Timing is important as it marks the beginning of changes in daily habits. This season marks the end of the school term and the beginning of the summer vacation period, when there are more teenagers behind the wheel.

However, the danger does not only happen on holiday weekends. According to an analysis by AAA using federal crash statistics, over 31% of deaths among teenage drivers happen between Memorial Day and Labor Day. In 2023, there were 860 fatalities resulting from accidents involving teenage drivers. Excessive speed continues to pose a major threat, as it causes nearly 30% of accidents among teenage drivers.

The roads tend to get busier in other ways, too. Warmer weather brings more motorcycles out, and recent data showed a sharp increase in motorcyclist fatalities among riders ages 15 to 20. Looking at the bigger picture, speeding continues to be one of the most common factors in fatal crashes, contributing to nearly three out of every ten traffic deaths nationwide.

Distracted Driving Peaks During Spring Travel Season

Distracted driving followed a noticeably different pattern than either DUI crashes or speeding.

While overall fatalities were concentrated in the fall and speeding peaked in May, distracted-driving crashes clustered around early spring. March emerged as the deadliest month in 33 states, making it one of the strongest state-level trends in the entire analysis.

The District of Columbia was an outlier in the distracted-driving rankings, recording a fatal crash rate of 2.99 per 100,000 residents during its deadliest month. South Carolina, Kansas, Tennessee, Oklahoma, Mississippi, Kentucky, and Texas also ranked near the top, showing that distraction-related crashes remain a concern in both densely populated and largely rural states.

Distracted driving contributed to 2,955 fatal crashes across the United States in 2024. While total distracted driving crashes have dropped over the last decade, dangerous driver habits persist. In fact, some behaviors have gotten significantly worse. According to NHTSA statistics, instances of drivers manipulating electronic devices doubled between 2015 and 2024.

The Risks of Driving Somewhere New

March’s dominance may partially reflect seasonal travel patterns.

A University of Miami study found traffic fatalities rise in popular spring-break destinations between late February and early April. Researchers observed a 9.1% increase in weekly crash deaths in spring-break counties during that period. Vacation travel often places drivers on unfamiliar roads, relying more heavily on navigation systems and making split-second decisions in unfamiliar environments.

While drunk driving or speeding is a choice, distracted driving tends to be an extension of normal habits that become dangerous when on the road. Glancing at directions, switching songs, answering texts, or talking through voice-activated software does not seem dangerous at the time, but it remains all too common in deadly accidents.

Pedestrian Fatalities Rise During the Darkest Months of the Year

Pedestrian crashes produced perhaps the strongest seasonal concentration of any category examined.

January emerged as the deadliest month for pedestrian-involved fatal crashes in 37 states. November ranked first in seven states, while December led in two. The state-level results point strongly toward winter and late-fall conditions as periods of heightened pedestrian risk.

National totals told a slightly different story. Across all states combined, November recorded the highest number of pedestrian fatalities in 2024, with 728 deaths, followed by October and December.

In 2024, motor vehicle crashes claimed the lives of 7,049 pedestrians nationwide. November was the single deadliest month with 728 fatalities, followed closely by October and December as heightened risks persisted throughout the winter. 

Nebraska recorded the highest pedestrian fatal crash rate during its deadliest month, followed by Tennessee, Mississippi, Nevada, and the District of Columbia. Several of the country’s largest states, including California, Florida, New York, and New Jersey, also saw pedestrian fatalities peak during winter or the months surrounding it.

The pattern is similar to one that traffic safety specialists have noted for many years. The fewer hours of sunlight, the more likely people are to walk or cross streets during periods of poor lighting. With greater holiday travel and increased congestion, the risk for pedestrian accidents becomes particularly high in winter in locations that don’t normally receive much snowfall.

What the Findings Reveal About Roadway Risk

The findings make one thing clear: there isn’t a single time of year when roadway danger is at its highest. Some types of fatal crashes tend to rise during the summer travel season, while others are more likely to peak in the fall or winter.

October was the deadliest month overall in more states than any other month in the study, but that wasn’t the whole story. Speeding crashes, impaired-driving fatalities, distracted driving incidents, and pedestrian deaths each followed their own patterns, often peaking at completely different points in the year.

Taken together, the data shows how much crash risk can change from one season to the next. Where you live, how people travel, and even the amount of daylight available can all influence when roads become most dangerous.

The Human Cost Behind the Statistics

Traffic fatality data can tell us when the risks are highest, but the numbers only tell part of the story. Every crash included in the data affected someone’s life, whether it resulted in a serious injury, a family facing an unexpected loss, or a community dealing with the aftermath of a tragedy.

Many of the factors highlighted throughout the study, including impaired driving, speeding, distracted driving, and pedestrian safety, are issues that continue to shape traffic fatalities across the country. Understanding when these risks are most likely to occur is one small piece of a much larger effort to make roads safer for everyone.

For those involved in a serious collision, the challenges often continue long after the crash scene has been cleared. Medical treatment, insurance claims, lost income, and questions about liability can quickly become difficult to navigate. 

As a firm that works with accident victims and their families every day, Sweet James understands how significant these events can be. In situations like these, speaking with a car accident lawyer can help people better understand their rights and the options available to them.