Guillermo is the 7th name on the 2027 list of East Pacific hurricane names, so it is next scheduled for 2027. It is used that year only if the season reaches the letter G. Since 1985, seven storms have been named Guillermo; the strongest, in 1997, peaked as a Category 5 hurricane.
No. Guillermo is on the 2027 list of East Pacific names, and it is not among the 22 names NHC lists as retired from the eastern and central Pacific (Tropical Cyclone Naming History and Retired Names).
Guillermo is next scheduled for 2027, when the 2027 list is used. The six lists rotate, so each one returns every six years.
A name on the list is used only if the season gets that far. Guillermo is name 7 of 24, and every East Pacific season from 1980 to 2025 got at least that far.
Guillermo formed in the East Pacific in July 2021 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 999 mb. It did not make landfall. The system was tracked for 4 days.
Tropical Storm Guillermo (2021): track and historyGuillermo formed in the East Pacific in July 2015 and peaked as a Category 2 hurricane with maximum sustained winds of 110 mph (175 km/h) and a minimum pressure of 967 mb. It did not make landfall. The system was tracked for 12 days.
Hurricane Guillermo (2015): track and historyGuillermo formed in the East Pacific in August 2009 and peaked as a Category 3 hurricane with maximum sustained winds of 125 mph (205 km/h) and a minimum pressure of 954 mb. It did not make landfall. The system was tracked for 14 days.
Hurricane Guillermo (2009): track and historyGuillermo formed in the East Pacific in August 2003 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 997 mb. It did not make landfall. The system was tracked for 6 days.
Tropical Storm Guillermo (2003): track and historyGuillermo formed in the East Pacific in July 1997 and peaked as a Category 5 hurricane with maximum sustained winds of 160 mph (260 km/h) and a minimum pressure of 919 mb. It did not make landfall. The system was tracked for 25 days.
Hurricane Guillermo (1997): track and historyGuillermo formed in the East Pacific in August 1991 and peaked as a Category 1 hurricane with maximum sustained winds of 80 mph (130 km/h) and a minimum pressure of 983 mb. It did not make landfall. The system was tracked for 7 days.
Hurricane Guillermo (1991): track and historyGuillermo formed in the East Pacific in July 1985 and peaked as a tropical storm with maximum sustained winds of 60 mph (95 km/h). It did not make landfall. The system was tracked for 4 days.
Tropical Storm Guillermo (1985): track and historyNames go in alphabetical order, one per storm, as each storm reaches tropical-storm strength (39 mph, 34 knots), so a storm’s place in its season decides its name.
In each of 2021, 2015, 2009, 2003, 1997 and 1985, Guillermo was the 7th name used in the East Pacific season.
Seasons where our archive is missing an earlier name are left out, because we can’t confirm the count.
The most recent was Tropical Storm Guillermo in 2021, in the East Pacific. It formed on July 17, peaked at 60 mph (95 km/h) and lasted 4 days. It did not make landfall. It was the 7th name used in that East Pacific season. Before that, the name was used in 2015, 2009, 2003, 1997, 1991 and 1985.
Hurricane Guillermo in 1997 was the strongest, peaking as a Category 5 hurricane with winds of 160 mph (260 km/h) and a minimum pressure of 919 mb. It formed in the East Pacific in July. The weakest of the seven, in 2021, peaked at 60 mph (95 km/h).