Sweet James Analysis Finds Fatal Crash Risks Shift Dramatically by Season and State
October was the deadliest driving month in more states than any other month in 2024, but the nation’s most dangerous roadway behaviors followed entirely different seasonal patterns.
An analysis conducted by Sweet James found that fatal crashes involving speeding, impaired driving, distraction and pedestrians each peaked during separate parts of the year. The results show that roadway danger does not rise and fall uniformly. Instead, the most serious risks change as daylight, travel habits, school calendars and social activity shift.
The Five Calendars of Fatal Crash Risk
| Category | Most Common Deadliest Month | Key Finding |
|---|---|---|
| Overall fatal crashes | October | Ranked first in 24 states |
| DUI-involved crashes | September | Ranked first in 18 states |
| Speeding-involved crashes | May | Ranked first in 33 states |
| Distracted-driving crashes | March | Ranked first in 33 states |
| Pedestrian-involved crashes | January | Ranked first in 37 states |
This state-level view differs from national totals in some categories. For example, January was the most common deadliest pedestrian month across individual states, but November recorded the highest combined number of pedestrian deaths nationwide.
The distinction matters because a small number of high-population states can strongly influence national totals, while a state-by-state analysis shows how widespread a seasonal pattern is.
Fatal Crashes Reach Their National High in October
There were 36,297 fatal motor vehicle crashes in the United States during 2024.
October recorded 3,369, the highest monthly total. August followed with 3,342, and September recorded 3,277.
Together, the three-month period accounted for 9,988 fatal crashes, demonstrating how strongly overall roadway deaths were concentrated from late summer through mid-fall.
| Month | Fatal Crashes |
|---|---|
| August | 3,342 |
| September | 3,277 |
| October | 3,369 |
| Three-month total | 9,988 |
October ranked first in 24 states. April and July each led seven states, while June and August each led five.
The South showed the greatest October concentration, with 10 of 16 states recording their highest fatal crash levels during the month. September appeared more often in Midwestern states, while the Northeast was divided more evenly between July and October.
Wyoming Leads October Fatal Crash Rates
The highest crash counts and the highest crash rates were not found in the same places.
Wyoming produced the highest October rate at 2.04 fatal crashes per 100,000 residents. Mississippi, Montana, South Carolina and Alabama also ranked among the five highest.
Smaller populations can make state rates more sensitive to monthly changes, but roadway conditions also matter. Many high-ranking states contain extensive rural networks where crashes occur at higher speeds and emergency assistance may be farther away.
The District of Columbia, Massachusetts, Rhode Island, New York and Utah recorded the lowest October fatal crash rates.
The contrast illustrates how geography and road design can shape crash outcomes. Urban congestion may increase the frequency of minor collisions, while rural speed and distance can increase the likelihood that a crash becomes fatal.
October Combines Darkness, Wildlife and Changing Roads
Fall roadway risks are not always as visible as summer holiday traffic or winter storms.
Approximately 72% of drivers live in states where fall is the leading season for crash damage. October brings rapidly declining daylight, meaning more people commute in darkness.
Road conditions also become less predictable. Wet leaves can reduce traction, rainfall can make lane markings harder to see and colder mornings may affect tire pressure.
Wildlife adds another danger. Nearly half of deer-related collisions occur between October and December.
The month’s risk profile includes:
- More commuting during darkness
- Reduced traction from wet leaves
- Increased deer movement
- Continuing recreational and weekend travel
- Rapidly changing temperatures and weather
- Drivers who may not expect fall to rival summer for fatalities
Impaired Driving Peaks in September and June
Fatal DUI crashes followed a late-summer pattern.
The analysis identified 5,477 fatal crashes involving a driver impaired by alcohol, drugs or medication. September recorded the most, with 534, while June produced 519 and August produced 509.
September led in 18 states. June ranked first in 16.
Tennessee had the highest DUI fatal crash rate, followed by West Virginia, Oregon, Alaska and Connecticut.
| DUI Measure | Result |
|---|---|
| Fatal DUI-involved crashes | 5,477 |
| September crashes | 534 |
| June crashes | 519 |
| August crashes | 509 |
| States led by September | 18 |
| States led by June | 16 |
Football season may be one factor keeping impaired-driving risk high after summer. Labor Day weekend has historically carried a fatal DUI crash risk 53% above the normal daily average, and fall accounts for roughly 26% of DUI-related deaths.
Alcohol-impaired crashes killed 11,904 people in 2024, representing approximately 30% of national traffic deaths. That is equivalent to one death every 44 minutes.
May Is the Clear Speeding Peak
No category produced a more uniform result than speeding.
May was the deadliest speeding month in 33 states. Nationwide, speeding contributed to 10,203 fatal crashes, with May recording the highest monthly total at 962.
Tennessee led the state rate rankings at 1.63 per 100,000 residents. Oregon, Wyoming, Mississippi, Montana and South Carolina followed.
Several high-ranking states contain long rural routes where drivers may maintain higher speeds for extended distances. When crashes occur, those speeds increase impact forces and reduce the time available to react.
May also marks the beginning of the period when teen-driver risks rise. Between Memorial Day and Labor Day, more than 31% of teen-driver deaths occur. Crashes involving teenage drivers killed 860 people in 2023, while speeding contributes to nearly 30% of teen crashes.
Motorcycle traffic also increases as temperatures rise. The combination of more young drivers, motorcycles, vacation travel and higher speeds creates a dangerous transition into summer.
Distracted Driving Rises During Spring Travel
March was the deadliest distracted-driving month in 33 states.
Distracted driving contributed to 2,955 fatal crashes nationwide in 2024. The District of Columbia recorded the highest rate during its peak month, at 2.99 per 100,000 residents.
Other high-ranking jurisdictions included:
- South Carolina
- Kansas
- Tennessee
- Oklahoma
- Mississippi
- Kentucky
- Texas
The timing overlaps with spring break, when drivers travel to unfamiliar destinations and often rely on navigation systems. Research has found a 9.1% increase in weekly traffic deaths in spring-break counties between late February and early April.
Distraction also extends beyond texting. Drivers may look at directions, adjust music, interact with vehicle screens, eat or hold conversations. Instances of drivers manipulating electronic devices doubled between 2015 and 2024, showing that changing technology has not eliminated roadway distraction.
Winter Is the Deadliest Period for Pedestrians
January ranked as the deadliest pedestrian month in 37 states, the strongest state-level concentration in the study.
November led in seven states, while December ranked first in two. Nationally, November recorded 728 pedestrian deaths, more than any other month.
A total of 7,049 pedestrians were killed in motor vehicle crashes in 2024.
Nebraska recorded the highest pedestrian fatal crash rate during its deadliest month, followed by Tennessee, Mississippi, Nevada and the District of Columbia.
Pedestrian visibility becomes more difficult as daylight decreases. Workers, students and shoppers may travel after sunset, even when following routines that took place in daylight only weeks earlier.
Winter risks can be particularly severe in warmer states. Residents may continue walking throughout the year, but darkness arrives earlier even when snow and ice are absent.
The Deadliest Month Is Different for Every Roadway Threat
The Sweet James analysis shows why traffic safety cannot be reduced to one warning season.
October led overall crashes, but each major fatality category followed its own pattern:
- Impaired-driving fatalities concentrated in late summer and early fall.
- Speeding deaths surged in May.
- Distracted-driving fatalities peaked during early spring.
- Pedestrian deaths rose during the darkest months.
- Overall fatal crashes reached their highest level in October.
These findings give drivers a clearer picture of how risk changes throughout the year. They also demonstrate why safe driving requires more than avoiding major holidays. The most dangerous month may arrive quietly, shaped by ordinary commutes, earlier sunsets or familiar behaviors that become deadly behind the wheel.
For those injured in crashes, the effects can include hospitalization, rehabilitation, lost wages, insurance disputes and permanent changes to daily life. Sweet James represents accident victims and families seeking guidance after serious roadway incidents, helping them understand the legal and financial options available following a collision.
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