List of storms named Guillermo
- California
- Cyclone Guillaume
- Hawaii
- Hurricane Guillermo (1979)
- Hurricane Guillermo (1991)
- Hurricane Guillermo (1997)
- Hurricane Guillermo (2009)
- Hurricane Guillermo (2015)
- Pacific hurricane
- Revillagigedo Islands
- South-West Indian Ocean tropical cyclone
- Tropical Storm Guillermo (1985)
- Tropical Storm Guillermo (2003)
- Tropical Storm Guillermo (2021)