The Atlantic hurricane season runs from June 1 through November 30. The vast majority of storms that form across the basin form within this six-month window. However, it's not uncommon to see pre-season storms, and it's possible to see a storm form or linger into December.

Tropical cyclone activity gradually groans to life once June rolls around. These early-season storms tend to be relatively weak and short-lived. A weak storm doesn't mean it's not dangerous, though—Tropical Storm Allison's flooding killed more than 40 people in 2001.

Most storms during the month of June form close to land in the Gulf of Mexico or just off the coast of the southeastern United States, seeded by decaying cold fronts and clusters of thunderstorms rolling offshore.

The strongest storm to form during the month of June was Hurricane Audrey in 1957, which peaked with maximum sustained winds of 125 mph.

The most named storms to form during the month of June was 3, which occurred most recently in 2024.

Hurricane activity in the Atlantic Ocean begins to pick up in earnest during the month of July. Historically, the bulk of storm formation remains close to the United States, but we can start seeing tropical cyclone development in the Caribbean Sea.

Hurricane Emily in 2005 was the strongest storm to form in July, with peak winds of 160 mph.

The most named storms to form during the month of July was 5, which occurred most recently in 2020.

Oceanic heat and atmospheric conditions become extremely favorable for tropical cyclone development across the entire Atlantic basin once we arrive in August. The month typically sees an influx of tropical waves off the western coast of Africa, giving rise to "Cabo Verde" type hurricanes that can traverse the entire ocean basin before hitting land.

August is home to some of history's most infamous hurricanes. The strongest storm to form during the month of August was Hurricane Allen in 1980. Allen's maximum sustained winds reached 190 mph—which stands as the all-time strongest wind speed measured in a hurricane.

The 2012 hurricane season saw 8 named storms form in August, which stands as the high-water mark for tropical development for the month.

September is the heart of Atlantic hurricane season. The climatological peak of the season arrives on September 10. It's very rare to go more than a few days through an average September without at least one named storm swirling across the Atlantic—and often there are several storms at a time.

Hurricane Gilbert in 1988 remains the strongest storm to form during the month of September with its maximum sustained winds of 185 mph.

The most productive September on record is also the most prolific month ever observed in the Atlantic basin. September 2020 saw the formation of a whopping 10 named storms.

Hurricane activity generally begins to wane a bit once we arrive in October, but conditions still remain conducive for multiple strong hurricanes—especially storms that form in the western Caribbean. Some of the worst hurricane landfalls in recorded history occurred in October, including 2018's Hurricane Michael and 2005's Hurricane Wilma.

Wilma stands as the strongest hurricane recorded during the month of October, packing maximum sustained winds of 185 mph. The storm also had the lowest minimum air pressure ever observed in an Atlantic hurricane, coming in at 882 mb.

The 1950 hurricane season saw the most productive October witnessed in the Atlantic basin when 8 named storms developed.

Tropical cyclone activity drops off in a hurry once we arrive in November, with storm activity beginning to recede back to where the season began—most formations in November occur close to land, just as they did in June.

Even though the season is drawing to a close, it doesn't mean that the basin can't still support a strong storm. An unnamed hurricane that hit Cuba in 1932 is the strongest November storm on record. The storm's winds reached 175 mph.

The most storms we've recorded during the month of November was 3, which occurred most recently during the 2024 hurricane season.

Below is a listing of when the first named storm and the first hurricane formed during each Atlantic hurricane season since the beginning of the satellite era in 1966.

Some of the first "named" storms don't have names because forecasters often reanalyze past data to ensure records are complete and accurate, a process which occasionally reveals a storm missed in the moment, such as a brief tropical storm off the U.S. East Coast on January 16, 2023.

Between 1991 and 2020, the average formation date for the season's first named storm was June 6th, and the average formation date for the season's first hurricane was July 26th.